Free toolkit

How much chemical goes in my tank?

Pick the product, type the area you are spraying and your tank size. The answer appears underneath as you type.

Always follow the label on your bottle. This tool never adjusts a published rate.

Tell it three things.

Surge is pre-selected as the worked example.

The area you are actually spraying, not the whole property.

The capacity you actually fill to, not the size moulded into the tank.
Optional — the water you spray per 1,000 sq ft (currently 1 gallon)

This is already filled in with 1 gallon per 1,000 sq ft, which is what most lawn sprays use — about 40 mL per square metre, or 3.785 litres per 1,000 sq ft. Leave it as it is unless the label on your bottle states its own spray volume. It is here because the amount for one tank cannot be worked out without it, and it never blocks the answer above.

Your own sprayer's figure beats the default. The “Checking your sprayer” section below shows how to measure it.

Optional — where you are, and who is spraying

The rates on this page are published label rates of US EPA-registered products. A US registration is not a Canadian or Australian registration, and commercial application is regulated differently from spraying your own ground. This control adds a note about that. It never hides a product, never removes a rate and never changes the arithmetic.

Free and standalone: no account, no sign-up, no plan, and nothing you type leaves your browser.

A worked example, so you can check the tool.

These are the values the page starts with: Surge Broadleaf Herbicide for Turf, 5,000 sq ft, a 2-gallon tank, and the water field left at its default of 1 gallon per 1,000 sq ft. The answer on screen is this one until you change a field.

  1. Product for the job. The source prints 1.2 fl oz per 1,000 sq ft for this product. 5,000 sq ft is five thousand-square-foot units, so 1.2 × 5 = 6 fl oz. That is 177.4 mL.
  2. Water for the job. 1 gallon per 1,000 sq ft × 5 = 5 gallons. That is 18.93 litres.
  3. Tank loads. 5 gallons ÷ 2 gallons = 2.5 tank loads: two full tanks plus a 1-gallon part load.
  4. Product in one full tank. 6 fl oz ÷ 2.5 tank loads = 2.4 fl oz in each full 2-gallon tank. The part load takes 1.2 fl oz in 1 gallon, which is the same proportion.
  5. Area one full tank covers. 2 gallons ÷ 1 gallon per 1,000 sq ft = 2,000 sq ft per tankload.
  6. In metric. Enter 464.5 m² instead of 5,000 sq ft and the same arithmetic applies: the product is unchanged at 177.4 mL, and the water is 18.93 litres. The rate itself stays at 1.2 fl oz per 1,000 sq ft, because that is what the label prints.

Notice what did not happen: nothing was multiplied up for the weather, the weeds or the season, and nothing was added to the rate. 6 fl oz over 5,000 sq ft is exactly the published rate applied to that area.

The arithmetic, in full.

There is no hidden step. This is every equation the tool contains, and the constants it uses.

1. Product for the area

Product = label rate × area. If the rate is per 1,000 sq ft: 1.2 fl oz per 1,000 sq ft over 5,000 sq ft = 1.2 × 5 = 6 fl oz. If the rate is per acre: 7 pt per acre over 2 acres = 14 pt. Both are the same statement in different units, and the tool keeps the rate in the unit the source printed, so the amount comes out in that unit too. The rate is never converted into another unit and shown as a label rate, and it is never adjusted.

2. Water for the area

Water = water per 1,000 sq ft × area. One gallon per 1,000 sq ft over 5,000 sq ft = 5 gallons. The pre-filled value of 1 gallon per 1,000 sq ft is typical for lawn spraying, and it is about 40 mL per square metre, or 3.785 litres per 1,000 sq ft. Your own label may state a different spray volume, and if it does, use your label's figure in the optional field. The water number never changes the label rate: it changes how much solution carries the product, so it changes the number of tankloads and the amount that goes into each one — not how much product the area needs.

3. Tankloads and the amount per tank

Tankloads = water ÷ tank size. 5 gallons ÷ 2 gallons = 2.5 tankloads. Product in one full tank = product ÷ tankloads: 6 fl oz ÷ 2.5 = 2.4 fl oz. That is exactly the same proportion as the water — a full tank holds 2 of the 5 gallons, so it holds 2 ÷ 5 of the product. A final part load takes its own share, and the tool states that share rather than rounding the product up, because rounding a rate up is the thing this page exists to refuse. Area one tank covers = tank size ÷ water per 1,000 sq ft: 2 gallons ÷ 1 gallon per 1,000 sq ft = 2,000 sq ft.

4. Units

You enter area in sq ft, acres, m² or hectares, and the tank in gallons or litres. Internally the tool converts to square feet and millilitres with exact factors: 1 acre = 43,560 sq ft, 1 m² = 10.763910416709722 sq ft, 1 hectare = 10,000 m², 1 US gallon = 3.785411784 litres, 1 US fluid ounce = 29.5735295625 mL, 1 ounce (weight) = 28.349523125 g. Those conversions exist so you can use the units you have, and so the same amount can be shown in the other common unit beside the answer. They are not a rate conversion: the label's own unit is always the primary figure.

5. What the tool will not do

It does not increase a rate — not for heat, not for heavy weeds, not for brush, not for anything, and there is no input that could. Several of the labels in the sources say do not apply when the air temperature is above 90 °F, so the answer for hot conditions is the label's answer: do not apply. It does not choose a rate for you, does not combine products, and gives no tank-mix recipe, no mix order and no compatibility advice. It does not tell you that a use is registered where you live. One product, one rate, one area, and the label on the bottle decides.

Checking your sprayer (only if you want to)

You do not need any of this to use the tool. The pre-filled water figure is a sensible default that most lawn labels sit close to. If you would rather use your own sprayer's real output, here is how to measure it, and here is what it changes.

The 1/128-acre method

Mark out a rectangle 18.5 ft × 18.5 ft, which is 340 sq ft — one 128th of an acre. Fill the tank with water only. Spray the marked area at the speed, pressure and nozzle height you will actually use, keeping the nozzle on. Measure how much water it takes to refill the tank to the same mark. That figure in gallons is your application rate in gallons per acre directly, because you sprayed exactly 1/128 of an acre: 1 gallon used = 128 gallons per acre. Repeat it twice and average the three runs. Source: the 1/128-acre method as taught in University of Wisconsin–Extension calibration material.

Converting to gallons per 1,000 sq ft

The tool's water field is per 1,000 sq ft, so divide your gallons per acre by 43.56: gal per 1,000 sq ft = GPA ÷ 43.56. That divisor is just arithmetic — 43,560 sq ft in an acre ÷ 1,000 = 43.56. The formula method and that divisor are published by Pesticide Environmental Stewardship. Worked: 44 gal per acre ÷ 43.56 = 1.01 gal per 1,000 sq ft. In metric, 1 gallon per 1,000 sq ft is the same spray volume as 40.7 mL per square metre, or 3.785 L per 92.9 m².

What a wrong water figure does and does not change

It does not change the label rate, and it does not change how much product your area needs: that is rate × area, and nothing else. It changes how much water that product goes into, so it changes the number of tankloads and the amount in each one. If you enter a much higher water figure than you really spray, the job will look like more tankloads than it needs, and each tank will be told to carry less product than it should for that volume. That is why the field is there, and why your own measurement beats a default when the label states a spray volume of its own.

Professional detail

Carrier volume, spray pressure, nozzle selection, droplet size, drift management and the order in which a tank is filled are all label and equipment matters. This tool publishes no mix order and no tank-mix recipe, and it publishes no personal protective equipment, re-entry interval or buffer zone values, because those are read off the label of the product in your hand. The rate reference below records the restrictions the cited sources do give — temperature limits, application intervals, reseeding and mowing windows, turf species limits, and buffer and clippings rules.

Every rate this tool can use, and its source.

Twenty-five products and twenty-seven rate statements, quoted as printed from the PNW Weed Management Handbook and the UC Statewide IPM Program turfgrass table. A product appears in the dropdown above only because one of these rates exists for it, and no rate appears without its source. Where the source prints a range, the tool uses the lowest figure and the rate as printed is shown here in full. Where the source did not give an EPA registration number, the row says so rather than guessing.

  • Trimec Classic Broadleaf Herbicide

    2,4-D + mecoprop-p (MCPP-p) + dicamba

    Group 4 synthetic auxins (dicamba is a benzoate; still Group 4) · Liquid concentrate (amine salt)

    Maximum 4.0 pt product per acre per application; maximum 8.0 pt per acre per year. Maximum 2 applications per year, at least 30 days apart.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 2217-543
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Label sites include ornamental lawns and turf on institutional, ornamental and residential/domestic sites, and sod farms. The source states the product is intended to be applied by lawn care operators and landscape personnel.

    Licence: The cited source describes this product as intended for application by lawn care operators and landscape personnel. Applying any pesticide for compensation is commercial application and is regulated as such.

    Restrictions recorded in the cited source:

    • Do not apply when air temperature exceeds 90 °F.
    • Do not apply to newly seeded turf until after the second or third mowing.
    • Wait 3 to 4 weeks after application before seeding new turfgrass.
    • Minimum 30 days between applications; maximum 2 applications per year.
    • Annual maximum 8.0 pt per acre.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Surge Broadleaf Herbicide for Turf

    2,4-D + mecoprop-p + dicamba + sulfentrazone

    Group 4 synthetic auxins plus sulfentrazone (Group 14 PPO inhibitor) · Liquid concentrate

    Broadcast: 3.25 to 4 pt per acre in 10 to 200 gal water per acre, or 1.2 to 1.5 fl oz per 1,000 sq ft in 0.23 to 5 gal water per 1,000 sq ft. Spot: 1.2 to 1.5 fl oz per 1,000 sq ft in 1 gal water per 1,000 sq ft.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 2217-867
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Residential/domestic sites, ornamental sites, institutional sites, noncropland sites and agricultural sites. Tolerant grasses listed include Kentucky bluegrass, perennial ryegrass, bentgrass, fescues, bermudagrass, zoysiagrass, bahiagrass and buffalograss.

    Licence: Sold as a professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not broadcast this product when temperatures are above 90 °F.
    • Do not apply to carpetgrass, dichondra, St. Augustinegrass, golf course greens, tees and collars, or lawns with desirable clovers or legumes.
    • Delay application to grass seedlings until after the second or third mowing, or 28 days after emergence.
    • For newly sodded, sprigged or plugged grasses, delay 3 to 4 weeks.
    • Do not irrigate for 24 hours. Delay mowing 2 days before and 2 days after application.
    • Leave clippings from the first three mowings on the treated area; do not use them as mulch or compost.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Power Zone Broadleaf Herbicide for Turf

    carfentrazone-ethyl + MCPA + MCPP + dicamba

    Carfentrazone-ethyl Group 14 PPO inhibitor; MCPA, MCPP and dicamba Group 4 synthetic auxins · Emulsifiable concentrate

    1.3 to 1.8 fl oz per 1,000 sq ft.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 2217-834
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Institutional, ornamental and residential sites, sod production, and noncropland (rights-of-way, roadsides, medians, airports and military installations).

    Licence: The cited label includes residential sites, so it can legitimately be applied on a home lawn. Applying it for compensation still makes the work commercial application.

    Restrictions recorded in the cited source:

    • Do not apply when air temperature exceeds 90 °F.
    • Spray solution must be above pH 5 and below pH 8.
    • Do not apply to bentgrass greens, carpetgrass, dichondra, legumes, or lawns with desirable clovers.
    • Do not apply to new grass seedlings until after the second mowing.
    • Wait 3 to 4 weeks before applying to newly sodded, sprigged or plugged areas.
    • Treated areas may be reseeded 2 weeks after application.
    • Do not irrigate turfgrass within 24 hours after applying. Delay mowing 1 to 2 days before and after.
    • Do not apply to any body of water, wetlands, irrigation ditch banks or shorelines.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Q4 Plus Turf Herbicide

    2,4-D + quinclorac + dicamba + sulfentrazone

    Group 4 synthetic auxins (quinclorac is Group 4/29) plus sulfentrazone (Group 14) · Liquid concentrate

    7 to 8 pt per acre, or 2.6 to 3 fl oz per 1,000 sq ft. Carrier 50 to 220 gal per acre (1.2 to 5.0 gal per 1,000 sq ft), spray pressure 20 to 40 psi.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 2217-930
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Residential/domestic sites, ornamental sites, institutional sites, noncropland sites and agricultural sites.

    Licence: The cited label includes residential/domestic sites. Commercial application for compensation still requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not broadcast this product when temperatures are above 90 °F.
    • Sequential applications, whether broadcast or spot, should be made 14 to 21 days after the initial application.
    • Do not apply to bahiagrass, carpetgrass, centipedegrass, dichondra, St. Augustinegrass, golf course greens, tees and collars, or lawns with desirable clovers or legumes.
    • Delay application to grass seedlings until after the second or third mowing, or 28 days after emergence.
    • For newly sodded, sprigged or plugged grasses, delay 3 to 4 weeks.
    • Do not apply immediately before rainfall or irrigation and do not irrigate for 24 hours after application.
    • Delay mowing 2 days before and 2 days after application; leave the first three mowings on site.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Escalade 2 Herbicide

    2,4-D + fluroxypyr + dicamba

    Group 4 synthetic auxins · Liquid concentrate

    2 to 3 pt in 20 to 240 gal water per acre, or 0.73 to 1.1 fl oz in 0.5 to 5.5 gal water per 1,000 sq ft. On bentgrass cut at fairway height: maximum 2 pt per acre, or 0.73 fl oz per 1,000 sq ft. If grass is under stress: 1 to 1.5 pt per acre, or 0.36 to 0.55 fl oz per 1,000 sq ft.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 228-442
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Kentucky bluegrass, fescue, perennial ryegrass and bentgrass turf, excluding golf greens and tees.

    Licence: Professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not apply when air temperature exceeds 90 °F.
    • For turf, do not exceed two broadcast applications per year; to limit damage, wait four weeks before a second application.
    • Do not apply to golf greens and tees, centipedegrass, St. Augustinegrass, dichondra, legumes, or lawns with desirable clovers.
    • Do not apply to new grass seedlings until after the second mowing. Wait 3 to 4 weeks for newly sodded, sprigged or plugged areas.
    • Do not reseed for 3 to 4 weeks after applying.
    • Do not irrigate turfgrass within 24 hours after application. Delay mowing 1 to 2 days before and after.
    • Avoid contact with exposed feeder roots of ornamental trees and shrubs.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Super Trimec Broadleaf Herbicide

    2,4-D + 2,4-DP (dichlorprop-p) + dicamba

    Group 4 synthetic auxins · Liquid concentrate; available in amine salt and ester formulations

    Maximum 3.0 pt of product per acre per application. Maximum seasonal rate 6.0 pt of product per acre.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 2217-758
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Turf and lawn sites per the product label; the cited source lists this product among the 2,4-D + 2,4-DP mixtures for turf.

    Licence: Professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Maximum 3.0 pt per acre per application.
    • Maximum 6.0 pt per acre per season.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Triamine Herbicide

    2,4-D + 2,4-DP (dichlorprop-p) + MCPP

    Group 4 synthetic auxins · Liquid concentrate; available in amine salt and ester formulations

    3 to 4 pt per acre. Do not apply more than 9 pt per acre per application or 18 pt per acre per season, excluding spot treatments. Applications must be 30 days apart.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 228-178
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Turf and lawn sites per the product label; the cited source lists this product among the 2,4-D + 2,4-DP mixtures for turf.

    Licence: Professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Maximum 9 pt per acre per application; 18 pt per acre per season, excluding spot treatments.
    • Applications must be at least 30 days apart.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Tri-Power Selective Herbicide

    MCPA + MCPP + dicamba

    Group 4 synthetic auxins · Liquid concentrate; available in amine salt and ester formulations

    Do not apply more than 3.87 pt of this product per acre per application. Do not apply more than 7.74 pt per acre per year, including all broadcast and spot treatments combined.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 228-262
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Turf and lawn sites per the product label; the cited source lists this product among the MCPA + MCPP + dicamba mixtures for turf.

    Licence: Professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Maximum 3.87 pt per acre per application.
    • Maximum 7.74 pt per acre per year, counting broadcast and spot treatments together.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Quincept Herbicide (also listed as Lesco Momentum Q)

    2,4-D + quinclorac + dicamba

    Group 4 synthetic auxins (quinclorac is Group 4/29) · Liquid concentrate

    7 to 8 pt per acre in 20 to 300 gal water per acre. Spot: 2.6 to 2.9 fl oz per 1,000 sq ft in 0.5 to 6.9 gal water per 1,000 sq ft. Maximum two applications per year.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 228-531
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Residential and nonresidential turfgrasses, including grounds or lawns around residential and commercial establishments, parks, schools, athletic fields, cemeteries, golf courses and sod farms.

    Licence: Sold as a professional turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Maximum of two applications per year.
    • Do not exceed 1.5 lb active ingredient quinclorac per acre per year.
    • Do not apply to newly seeded grass until after the third mowing or 4 weeks after emergence.
    • Do not mow for 2 days before or after applying.
    • Do not apply by air or through any type of irrigation system.
    • Do not use on golf course greens, tees or collars, or on lawns with desirable clovers or legumes.
    • Application to established creeping bentgrass must be in two to three split applications.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • 2,4-D Amine 4 (2,4-D Weed Killer)

    2,4-D, dimethylamine salt

    Group 4 synthetic auxin · Liquid concentrate (amine salt)

    2 to 3 pt per acre, per the Nufarm Weedar 64 label quoted in the source. Do not exceed a maximum of 6 pt per acre per season, excluding spot treatments.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA Reg. No. 34704-120
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Turf and lawn sites per the product label; the cited source discusses it as a turf broadleaf herbicide.

    Licence: Amine formulations of 2,4-D are widely sold at retail for home lawn use. The cited source also records that in parts of the Pacific Northwest, phenoxy hormone-type herbicides including 2,4-D and dicamba distributed in counties east of the Cascade crest are classified restricted-use.

    Restrictions recorded in the cited source:

    • Maximum 6 pt per acre per season, excluding spot treatments.
    • May injure sensitive grasses such as bentgrass (turf) and roughstalk bluegrass at high rates or during environmental stress.
    • The cited source records that in Washington, phenoxy hormone-type herbicides including 2,4-D are classified restricted-use in counties east of the crest of the Cascade Mountains. Check the current state rule for formulation and application timing.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Tenacity Herbicide

    mesotrione

    Group 27 HPPD inhibitor · Liquid suspension concentrate

    4 to 8 fl oz per acre in 30 gal water per acre for both pre-emergence and early post-emergence control. For bentgrass control, 5 fl oz per acre in 30 gal water. For new seedlings, 5 to 8 fl oz per acre. Spot treatment: 1 gal of solution per 1,000 sq ft. Do not apply more than 16 fl oz per acre per year.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA Reg. No. 100-1267
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Golf courses (not putting greens), sod farms, athletic fields, parks, residential and commercial properties, cemeteries, airports and lawns.

    Licence: The cited label includes residential and commercial properties and lawns. Commercial application for compensation still requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not exceed 16 fl oz per acre per year.
    • Do not apply to newly germinated turfgrass until it has been mowed twice, or about 4 weeks after emergence. When applying after seeding, wait until the turf has been mowed twice or four weeks after emergence, whichever is longer.
    • Do not exceed 5 fl oz per acre per application to perennial ryegrass or fine fescues, or to mixed stands containing more than 50% perennial ryegrass and/or fine fescue.
    • Maintain a 5 ft buffer between treated areas and putting greens.
    • Do not plant any crop other than turfgrass species for 18 months after the last application.
    • Do not apply an organophosphate or carbamate insecticide within 7 days of application.
    • Do not apply by air or through any type of irrigation system. Restricted-entry interval is 12 hours.
    • Tenacity may temporarily whiten turfgrass foliage.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Drive XLR8 Herbicide

    quinclorac

    Group 4/29 synthetic auxin · Liquid suspension concentrate

    0.367 oz per 1,000 sq ft, or 0.75 lb active ingredient per acre. On creeping bentgrass, 0.5 to 1 oz per 1,000 sq ft, or 0.25 to 0.50 lb active ingredient per acre in 2 to 3 applications.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA Reg. No. 7969-272
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Turf and lawn sites per the product label; the cited source describes it as a selective turf herbicide with pre-emergence and post-emergence activity.

    Licence: Quinclorac is widely sold at retail for home lawn crabgrass and broadleaf control. Commercial application for compensation still requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not mow 2 days before or after applying Drive 75DF, to maximise weed control.
    • Do not irrigate for 24 hours after applying; irrigation 2 to 7 days after application is recommended.
    • Do not apply within 4 weeks after perennial ryegrass or Kentucky bluegrass seedlings emerge.
    • Fine fescues and creeping bentgrasses are only moderately tolerant; colonial bentgrass is highly susceptible.
    • Do not apply to golf course collars or greens.
    • Do not allow drift to desirable plants, especially tomatoes, eggplants and peppers.
    • Do not use clippings as mulch or compost around flowers, ornamentals or trees, or in vegetable gardens.
    • Mulch clippings on site for the first three mowings after applying.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Defendor Specialty Herbicide

    florasulam

    Group 2 ALS inhibitor · Liquid suspension concentrate

    4 fl oz per acre, quoted in the source as 0.25 pt per acre or 0.09 fl oz per 1,000 sq ft. Do not apply more than 12 fl oz per acre per annual growing season.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA registration number not given in the cited source
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established cool-season and warm-season grasses. The cited source states that only perennial ryegrass and tall fescue are listed on the label and that other grasses are listed as not having been evaluated.

    Licence: Professional specialty turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not apply more than 12 fl oz per acre per annual growing season.
    • Do not make additional applications within 4 weeks of a previous application.
    • Do not apply to golf course greens.
    • Do not allow the product to sit in the tank overnight or for prolonged periods without agitation before use.
    • Do not apply through any type of irrigation system.
    • Do not use treated clippings for mulch around edible plants.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Sapphire Specialty Herbicide

    penoxsulam

    Group 2 ALS inhibitor · Liquid suspension concentrate

    0.25 to 0.5 pt per acre, per the source. Under heat stress conditions, use only 0.25 pt per acre on perennial ryegrass and tall fescue.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA registration number not given in the cited source
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Bentgrasses, tall fescue and perennial ryegrasses on golf courses, lawns, general turf, school outdoor areas and sod farms.

    Licence: Professional specialty turf product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Under heat stress conditions use only 0.25 pt per acre on perennial ryegrass and tall fescue.
    • The cited source records no annual maximum for this product. Check the current label before planning a season.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Basagran T&O Herbicide

    bentazon

    Group 6 photosynthesis II inhibitor (contact, for sedges) · Liquid concentrate

    2 pt per acre in 40 to 80 gal water, or 0.75 fl oz per 1,000 sq ft in 1 to 2 gal water. No more than 4 pt per acre or 1.5 fl oz per 1,000 sq ft in one season.Source: PNW Weed Management Handbook — Nutsedge and Perennial Grasses

    EPA Reg. No. 7969-326
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established turfgrass for sedge control. The cited source marks this product separately as NON-Homeowner.

    Licence: The cited source marks this product as NON-Homeowner. It is a professional product and is not presented here as available for home lawn use.

    Restrictions recorded in the cited source:

    • No more than 4 pt per acre or 1.5 fl oz per 1,000 sq ft in one season.
    • Do not apply to turf under stress from drought, cold or other herbicides.
    • Do not apply to newly seeded turf.
    • Do not use on putting greens or collars.
    • Note the rate restrictions for perennial ryegrass on the label.
    • Rain after application reduces activity.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Celero Herbicide

    imazosulfuron

    Group 2 ALS inhibitor (sedge control) · 75% water-dispersible granule

    0.38 to 0.66 lb active ingredient per acre, quoted in the source as 8 to 14 oz per acre.Source: PNW Weed Management Handbook — Nutsedge and Perennial Grasses

    EPA Reg. No. 59639-155
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established turfgrass: golf course fairways, tees and roughs, home lawns, sod farms, roadsides, sports fields. The source states Celero is safe on all warm- and cool-season turfgrasses.

    Licence: Professional sedge product. Commercial application for compensation requires applicator certification where the state requires it. A granular retail sedge product is a different product with a different label.

    Restrictions recorded in the cited source:

    • Use a 0.25% v/v nonionic surfactant concentration for broadcast applications.
    • For sedges: treat in the 3- to 8-leaf stage; a second treatment may be required 6 to 10 weeks later.
    • The cited source records no annual maximum for this product. Check the current label before planning a season.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Dismiss Turf Herbicide

    sulfentrazone

    Group 14 PPO inhibitor (sedge control) · Liquid concentrate

    4 to 12 fl oz per acre. Rates lower than 12 fl oz per acre will generally control sedges for at least 60 days. For purple nutsedge, an initial 4 to 8 oz per acre followed by a second application.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA Reg. No. 279-3295
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established turf, including residential and institutional lawns, athletic fields, commercial sod farms, golf course fairways and roughs.

    Licence: Professional sedge product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • Use of surfactants is not recommended; the result may include temporary discoloration of some turf types.
    • High temperatures and high relative humidity may increase the risk of temporary discoloration.
    • Do not apply to turfgrass weakened by weather, mechanical, chemical, disease or other related stress.
    • Do not apply to sod within 3 months of harvest or 3 months of establishment.
    • The cited source notes a California-registered alternative product. Check the current registration for your state.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Dismiss NXT Herbicide

    sulfentrazone + carfentrazone-ethyl

    Group 14 PPO inhibitors · Liquid concentrate

    0.117 to 0.350 fl oz per 1,000 sq ft. For purple nutsedge, 0.117 to 0.234 fl oz per 1,000 sq ft initially, followed by a second application when actively growing purple nutsedge is visible.Source: PNW Weed Management Handbook — Mixtures without Triclopyr

    EPA Reg. No. 279-3383
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established turf, including residential and institutional lawns, athletic fields, commercial sod farms, golf course fairways and roughs.

    Licence: Professional sedge product. Commercial application for compensation requires applicator certification where the state requires it.

    Restrictions recorded in the cited source:

    • The cited source flags this product Not Registered for Use in California. Registration status differs by state and must be checked.
    • Use of surfactants is not recommended; the result may include temporary discoloration of some turf types.
    • Do not apply on turfgrass weakened by weather, mechanical, chemical, disease or other related stress.
    • Avoid applications in late fall or early spring; discoloration may be more severe in shaded or low-lying areas where frost persists.
    • Do not apply to sod within 3 months of harvest or 3 months of establishment.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Tenacity Herbicide (turf establishment use)

    mesotrione

    Group 27 HPPD inhibitor · Liquid suspension concentrate

    5 to 8 fl oz per acre in at least 30 gal water per acre prior to seeding or after seeding of tolerant turfgrass species listed on the label, except fine fescue.Source: PNW Weed Management Handbook — Nutsedge and Perennial Grasses

    EPA Reg. No. 100-1267
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Golf courses (not putting greens), sod farms, athletic fields, parks, residential and commercial properties, cemeteries, airports and lawns.

    Licence: The cited label includes residential properties and lawns. Commercial application for compensation still requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Do not exceed 16 fl oz per acre per year.
    • Do not apply to newly germinated turfgrass until it has been mowed twice, or about 4 weeks after emergence, whichever is longer.
    • Tenacity may reduce the density of fine fescue seedings. It can be used on grass seed blends containing less than 20% by weight of hard or fine fescue.
    • Do not apply an organophosphate or carbamate insecticide within 7 days of application.
    • Do not apply by air or through any type of irrigation system. Restricted-entry interval is 12 hours.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Dimension 2EW Specialty Herbicide

    dithiopyr

    Group 3 microtubule assembly inhibitor (pre-emergence, with limited post-emergence activity) · Emulsifiable concentrate

    0.25 to 0.5 lb active ingredient per acre, applied as 1 to 2 pt of Dimension 2EW per acre.Source: UC Statewide IPM Program — Turfgrass Herbicide Treatment Table (UC ANR Publication 3365-T)

    Use 0.19 to 0.38 lb acid equivalent per acre. Do not apply more than 0.5 lb active ingredient per acre per application or 1.5 lb active ingredient per acre per year in split or sequential applications.Source: PNW Weed Management Handbook — Chemical Control of Broadleaf Weeds in Turf

    EPA Reg. No. 62719-542
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Most turfgrass sites including residential lawns, per the cited source table. Do not use on golf course putting greens.

    Licence: Dithiopyr is sold at retail in granular weed-and-feed and stand-alone home lawn products. The cited source also records granular and professional formulations under the same active ingredient.

    Restrictions recorded in the cited source:

    • Do not apply more than 1.5 lb active ingredient per acre per year in split or sequential applications.
    • Do not apply within 3 months of seeding, overseeding or sprigging.
    • Do not use on golf course putting greens.
    • Do not use on seedling turf; injury will be severe.
    • Do not apply to turf under environmental stress.
    • The two cited sources state different rate ranges for this active ingredient. Both are shown. Your product label governs.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Arkon Herbicide

    pyrimisulfan

    ALS inhibitor (sedge and kyllinga control) · Liquid concentrate

    1.2 to 1.7 fl oz of product per 1,000 sq ft, quoted in the source as 3.4 to 4.7 pt per acre. Do not apply more than a total of 2.5 fl oz per 1,000 sq ft per year.Source: PNW Weed Management Handbook — Nutsedge and Perennial Grasses

    EPA Reg. No. 2217-1072
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Established cool-season grasses. The source states it is safe on all established cool-season grasses, and that not all cultivars of bentgrass have been tested.

    Licence: Professional product. Note the label requirement recorded in the source that a commercial applicator must notify affected residences in writing. That requirement falls on the contractor, not the homeowner.

    Restrictions recorded in the cited source:

    • Maximum 2.5 fl oz per 1,000 sq ft per year.
    • Do not retreat within 30 days of the initial application.
    • Ground application only; aerial applications are prohibited.
    • Do not apply through any type of irrigation system.
    • Seeding interval: 2 weeks for Kentucky bluegrass and perennial ryegrass. Sodding, sprigging or plugging: 3 weeks after application.
    • Do not use on carpetgrass, dichondra, legumes, or turfgrass where desirable clovers are present.
    • Do not collect grass clippings for mulch or compost for 3 weeks after treatment. The applicator must notify the appropriate residences or individuals in writing when this product is applied by a lawn service or commercial applicator.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Glyphosate (Roundup WeatherMax example)

    glyphosate, potassium salt

    Group 9 EPSPS inhibitor · Liquid concentrate

    2 to 4 lb active ingredient per acre, applied as 1.7 to 3.5 qt per acre of the example product. Use the lower rate for annual weeds and the higher rate for perennial weeds. The cited table gives 4 hours as the agricultural re-entry interval, and until dry for non-agricultural use.Source: UC Statewide IPM Program — Turfgrass Herbicide Treatment Table (UC ANR Publication 3365-T)

    EPA registration number not given in the cited source
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Pre-plant, non-selective application before seedbed preparation. The cited source states glyphosate will eliminate nearly all established weeds and turf species from a site before seedbed preparation.

    Licence: Glyphosate products are widely sold at retail. Use on a client site is commercial application and requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Non-selective: it will kill the turf as well as the weeds. This is a renovation or bare-ground product, not a spot spray for a lawn you intend to keep.
    • No pre-emergence activity on emerging weeds or turf species.
    • Apply to actively growing weeds that are not stressed. Summer applications are often ineffective because of poor translocation.
    • The cited source records resistance in some Conyza species, such as horseweed and hairy fleabane, and only partial control of little mallow, burning nettle and filarees.
    • Registered product names, EPA registration numbers and maximum annual rates differ by product and by state. The label of the example product governs.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

  • Glyphosate (Roundup Pro example)

    glyphosate, isopropylamine salt

    Group 9 EPSPS inhibitor · Liquid concentrate

    The same 2 to 4 lb active ingredient per acre basis quoted in the cited table, applied as 2.66 to 5.33 qt per acre of the example product. The cited table gives 4 hours as the agricultural re-entry interval, and until dry for non-agricultural use.Source: UC Statewide IPM Program — Turfgrass Herbicide Treatment Table (UC ANR Publication 3365-T)

    EPA registration number not given in the cited source
    Where the label allows it, the licence position, and the restrictions in the source

    Where the label allows it: Pre-plant, non-selective application before seedbed preparation.

    Licence: Glyphosate products are widely sold at retail. Use on a client site is commercial application and requires certification where the state requires it.

    Restrictions recorded in the cited source:

    • Non-selective: it will kill turf as well as weeds. Renovation or bare-ground use, not a spot spray for a lawn you intend to keep.
    • The two example products in the cited table have different quart-per-acre figures on the same active-ingredient basis. Use the figure printed on the bottle you hold.
    • Registered product names, EPA registration numbers and maximum annual rates differ by product and by state.

    No product-specific personal protective equipment, re-entry interval or buffer zone value is published on this page, because no product label section was retrieved for it. Read those off your own label.

Sources.

Every rate, restriction and registration number on this page traces to one of these documents. Last checked against the live sources: 11 September 2026. Where two cited sources give different ranges for the same active ingredient, both are shown in the reference above and your label governs.

What this page does not claim
  • Where a source did not print an EPA registration number for a product, the row says the number was not given in that source. It is not guessed and it is not borrowed from a similar product.
  • No product-specific personal protective equipment, re-entry interval or buffer zone value is published here, because no product label section was retrieved. Read those off your own label.
  • Retail availability is not inferred from a product name. The cited sources are extension reference tables, not retail catalogues, so the page reports what each label permits and what the licence position is. The one exception is Basagran T&O, which the source itself marks NON-Homeowner.
  • No Australian or Canadian label rate is published, and no US rate was converted into one. The rates here are the published label rates of US EPA-registered products.
  • State, provincial and territorial rules are not modelled. The optional context control states the registration position; it does not decide what is permitted where you are.
  • This is not legal advice, not agronomic advice, and it does not establish that any use is registered or permitted where you are.

Questions this page answers.

How much chemical do I put in my tank?
Pick the product, enter the area you are spraying and the size of your tank. The tool takes the label rate published for that product, multiplies it by your area to get the product for the whole job, multiplies the water you spray per 1,000 sq ft by the same area to get the water, and divides the product by the number of tank loads to give what goes into one tank. The answer is shown as an amount of product and an amount of water, with the arithmetic in one line underneath so you can check it.
Where does the label rate come from, and can the tool change it?
Every rate is quoted from a named source — the PNW Weed Management Handbook or the UC Statewide IPM Program turfgrass table — and the source is shown under the product, in the reference table and in the sources list. Where a source prints a range, the tool uses the lowest figure and says so. It never increases a rate: there is no heat factor, no weed-density factor and no brush factor, and no field to enter one. Applying above the labelled rate is a violation of federal law.
Why does it ask for the water I spray per 1,000 sq ft?
Because a label rate is a product amount per area at a stated water volume, so product per tank cannot be worked out without it. The field is already filled in with 1 gallon per 1,000 sq ft, which is what most lawn sprays use, and that is about 40 millilitres per square metre. Leave it alone unless your label says otherwise. It is optional and it never blocks the answer.
Does the tool increase the rate for hot weather, heavy weeds or brush?
No, never. Multiplying a label rate up is illegal, whatever the conditions. The labels in the sources say do not apply when the air temperature is above 90 degrees Fahrenheit, so the correct answer for heat is not to spray, not to spray harder. This tool has no condition input, no severity input and no brush mode, and it cannot compute a figure above the published rate.
Can it combine two products, or tell me a mix order?
No. It takes one product, one rate and one area at a time. It gives no tank-mix recipe, no mix order and no compatibility advice, because that is label content for the products involved and, where the labels are silent, a question for the manufacturer.
Does it work in metric?
Yes. Enter the area in square metres or hectares and the tank in litres, and the arithmetic is done correctly in those units. The label rate stays in the unit the label printed, because that is the label rate, and the amount of product is shown in both units — fluid ounces with millilitres, or ounces with grams — so both are usable. A US rate is never converted and presented as another country's label rate.
What if the rate on my bottle is different from the one shown?
Then your bottle is right and this page is wrong. The rates here are quoted from two university extension sources and the tool uses the lowest figure the source prints for the product. Your own label governs: if it differs, follow the bottle and do not use this page's figure.
Why is there a question about where I am and who is spraying?
Because the rates here are published label rates of US EPA-registered products, and a US registration is not a Canadian or Australian registration. The question is optional. It adds a note explaining that, and it never hides a product, never removes a rate and never changes the arithmetic.
Do I need a licence to spray these products, and is this free?
Applying a pesticide for payment is commercial application, and many states and provinces require certification to use any pesticide commercially, not only restricted-use products. Check what your state, province or territory requires. The tool itself is free: no account, no sign-up, no plan, and it runs entirely in your browser, so nothing you type is sent anywhere.