Product Features

  • Post-emergent herbicide for warm season turfs
  • Controls over 120 broadleaf & grassy weeds
  • Available in single packs that cover 2,000 sq ft at the high rate

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Average Rating

4.5 out of 5 stars Rating: 4.3

48 Reviews | 184 Q&A

Product Overview

CELSIUS WG Herbicide is a postemergent foliar-applied herbicide containing three active ingredients that provide a broad spectrum of weed control. Celsius controls more than 120 annual and perennial broadleaf weeds and grasses in warm-season turf types, such as St. Augustinegrass, Bermudagrass, Centipedegrass, and Zoysiagrass.  Celsius herbicide is not labeled for use on cool-season grasses.

Coming in an easy-to-use wettable granular formulation, this weed killer is intended for use on residential lawns, commercial lawns, golf courses, sports fields, parks, campsites, recreational areas, roadsides, school grounds, cemeteries, sod farms.  After applying Celsius WG Herbicide, weed growth ceases within a matter of hours.  The weeds will progress from yellowing or turning red or purple to necrosis, resulting in the plant death within 1 to 4 weeks after application.  The speed of symptom development varies with temperature and will be faster at warmer temperatures. For best results to control mature weeds, apply when the daily average temperature is above 60° F. Make applications to actively growing weeds. Weed control may be reduced if application is made in the presence of heavy dew, fog, and mist/rain or when weeds are under stress due to drought.

Dallisgrass:    Please note that Celsius is labeled for suppression of dallisgrass only and can only be used for dallisgrass when tank mixed with another herbicide such as MSMA or Revolver (which are not for residential use).

Available Sizes:

  • 10oz Bottle – treats up to 2 acres.
  • Single Dose 0.226 oz pack - treats up to 2k sq ft. at the high rate and 4k sq ft at the low rate

Features and Specs

Active Ingredient Dicamba 57.4%, Iodosulfuron-methyl-sodium 1.9%, Thiencarbazone-methyl 8.7%
Target pests Annual and Perennial Broadleaf Weeds and Grasses
For use in Warm-Season Turf Types Only (St. Augustinegrass, Bermudagrass, Centipedegrass, Zoysiagrass) listed in this label in Commercial and Residential Sites NOT FOR USE on bahiagrass or cool-season turf types, including tall fescue, fine fescue, Kentucky bluegrass, perennial ryegrass, or creeping bentgrass
Pet safe Yes, when used according to the labeled instructions.
CT, VT, WA (Restricted To Licensed Applicators Only)
Due to state tax laws, Washington residents must purchase their specific state option when adding the 10 oz size to your cart.
Coverage Area 10 oz bottle: treats up to 2 acres. Single Dose 0.226 oz packs: treats up to 4k sq ft
Shipping Weight 0.78 lbs
Manufacturer Envu (Formerly Bayer) (Mfg. Number: 79714858)
EPA Registration 432-1507


This product has been tested and can be used on the following types of turfgrass and their cultivars:

  • St. Augustinegrass (Floratam, Palmetto, Bitter Blue, Common, Amerishade, Raleigh, Sapphire, Delmar, Captiva)
  • Bermudagrass (Tifway 419, Common, Tifsport, Discovery, Celebration, Sahara)
  • Centipedegrass (Tifblair)
  • Zoysiagrass (Meyer, Empire, Crown, Palisades, Cavalier, Zorro, DeAnza, Zenith)
  • Buffalograss (Legacy, Cody)
  • Crested hairgrass (Barkoel)
  • Russian wildrye (Bozoisky)
  • Sporobilis
  • Blue Grama (Elma)

Other turfgrasses and their cultivars may be tolerant to this product. However, tolerance testing should be done prior to use. Some temporary discoloration of certain warm-season grasses may occur when this product is mixed with other herbicides.


  • Barnyardgrass

  • Blackseed plantain
  • Bracted plantain
  • Broadleaf plantain, common plantain
  • Buckhorn plantain, narrowleaf plantain
  • California burclover
  • Carolina falsedandelion
  • Carpetweed, Indian chickweed
  • Dandelion
  • Common chickweed
  • Common millet,
  • Common ragweed 
  • Common sunflower 
  • Common vetch
  • Creeping beggarweed 
  • Curly dock 
  • Cutleaf evening primrose
  •  Dandelion 
  • Eastern black nightshade 
  • Field madder 
  • Field violet, wild pansy 
  • Giant foxtail 
  • Giant ragweed
  •  Green foxtail 
  • Ground ivy, Creeping Charlie 
  • Hairy bittercress 
  • Hairy nightshade 
  • Henbit Lamium
  • Horse purslane 
  • Johnsongrass
  • Lawn burweed, spurweed 
  • Oxeye daisy 
  • Palmer amaranth
  • Pennsylvania smartweed 
  • Pitted morningglory
  • Quackgrass
  • Rabbitfoot clover 
  • Red sorrel Rumex
  • Redroot pigweed 
  • Shattercane
  • Spiny sowthistle 
  • Stinkgrass 
  • Switchgrass 
  • Tansy mustard
  • Velvetleaf 
  • Venus looking-glass 
  • White clover 
  • White mustard 
  • Wild buckwheat 
  • Wild carrot
  • Wild oat 
  • Wild onion
  • American burnweed Fireweed
  • Asiatic hawksbeard 
  • Black nightshade 
  • Broadleaf signalgrass 
  • Browntop millet 
  • Canada thistle 
  • Canada toadflax 
  • Carolina dichondra, Dichondra
  •  Carolina geranium, wild geranium
  •  Carpetgrass
  • Chamberbitter 
  • Common lambsquarter
  • Common purslane
  • Common waterhemp 
  • Corn speedwell 
  • Creeping speedwell 
  • Dalligrass:  Please note that Celsius is labeled for suppression of dallisgrass only and can only be used for dallisgrass when tank mixed with another herbicide such as MSMA or Revolver (which are not for residential use).  
  • Dogfennel
  • Dollarweed, Pennywort
  •  Entireleaf morningglory 
  • Facelis, trampweed 
  • Fall panicum
  • Field pepperweed 
  • Field sandbur 
  • Fleabane 
  • Florida betony
  • Gophertail lovegrass
  • Green kyllinga 
  • Heartwing sorrel 
  • Heath aster
  • Horseweed, marestail 
  • Ivyleaf morningglory
  • Knawel
  • Lady’s Mantle 
  • Mouse-ear chickweed 
  • Paleseed plantain 
  • Parsley piert
  • Pokeberry 
  • Poorjoe
  • Prickly sida
  • Prostrate knotweed 
  • Red fescue
  • Rescuegrass
  • Russian thistle
  • Shepherd's purse
  • Sicklepod 
  • Slender aster 
  • Sprawling horseweed 
  • Swinecress 
  • Tall fescue 
  • Texas panicum 
  • Thin paspalum, bull paspalum
  •  Virginia dwarf dandelion 
  • White sweet clover 
  • Wild garlic, field garlic 
  • Wild lettuce, tall lettuce 
  • Wild mustard 
  • Yellow foxtail 
  • Yellow rocket
  • Yellow woodsorrel, Oxalis
  • Annual lespedeza 
  • Birdseye pearlwort 
  • Black medic , hop medic 
  • Dallisgrass
  • Doveweed 
  • Florida pusley 
  • Hemp sesbania 
  • Large crabgrass
  • Prostrate spurge 
  • Purple cudweed 
  • Ryegrass (clumpy) 
  • Virginia buttonweed
  • Western ragweed 
  • Whiteleaf sage
Review Search   
Sort Reviews
  • 4 of 5 Stars

    worth the price

    By Rpc on 12/12/2011

    Verified Purchase

    Was hesitant to buy given the price but the Floratam lawn was being overrun with weeds, dollar weed in particular. The product has worked well - kills the weeds without harming the lawn. Only a small amount of the product is needed to create a gallon of spray so the cost will be amortized.

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    115 of 120 people found this review helpful

  • 5 of 5 Stars

    By by crabgrass....

    By Marcus on 07/23/2012

    I wasn't sure at first that this product will work. But as soon as I applied the Celsius to my lawn the crabgrass stop growing and over the course of 4 weeks the crabgrass was dying and almost completely gone,my Bermuda choke it out...

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    72 of 80 people found this review helpful

  • 2 of 5 Stars

    Turf damage warning - Bayer has issued product update

    By Scott on 06/20/2012

    Following the label directions for spot treatment caused moderate and even some small spots of severe damage with clumps of grass (St. Augustine) falling out at the crown. In the update Bayer now recommends against surfactant for spot treatment. Basically, spot treating is not worth the risk due to damage from higher application rates as you focus the spray. The good news is my grass seems to be slowly recovering and the dollarweed and beggarweed were killed within days. The label lists kyllinga but it is still alive where the grass has died back. One weed which Manor/blade kills but this does not is Asiatic Dayflower. I have had some luck getting this to knock back blanket crabgrass but it grows back.

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    61 of 69 people found this review helpful

  • 5 of 5 Stars

    Celsius WG Herbicide works great

    By Pete on 10/11/2012

    Verified Purchase

    It seems like this has worked really well on my lawn trying to get rid of Dollarweed. I've tried Atrazine and Image in the past with minamal results. It did not hurt my Saint Augustine grass at all. I would definitely recommend this product. The only thing I would say is that a 10oz bottle is probably a 10 year supply. So I sprayed my neighbors yard and my mother-in laws yard as well.

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    58 of 60 people found this review helpful

  • 5 of 5 Stars

    Creeping beggarweed in St. Augustine at bay house in Texas.

    By Betty on 06/27/2012

    Verified Purchase

    Creeping beggarweed was taking over my St. Augustine grass at my bay house in Rockport, Tx. Other herbicides I tried did not even phase this weed. I followed the mixing instructions in 1 gal. sprayer with the sufficant added. I used about 6 gallons initially on June 15th and within 5 days the beggarweed was dead or dying. I mixed another gallon this week and spot sprayed the weed where I missed the first time. Thank goodness Celsius kills this obnoxious interloper. Of course, I would like it even more if it was less expensive but under the circumstances I was thrilled to find something so effective on this pest.

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    53 of 53 people found this review helpful

See all 48 customer reviews

Questions & Answers

Have a question about this product?
Sort Questions
You indicate not to spray Celsius above 85 degrees.

Can Celsius be sprayed at 85 degrees even the temperature is rising and will be above that in an hour or two? In other words can I spray in the morning when it is 75 degrees and an hour later the temperature is over 85 degrees?

As long as the temperature during the application of the Celsius is not 85 degrees or above, then it does not matter what temperature it reaches mid day. The best time to apply herbicides is either early morning when dew is still fresh on the ground or late afternoon when the lawn and weeds are under less stress from the environment. The less stress the weeds are under the better they will absorb the product being used.

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310 of 331 people found this answer helpful

Is there an herbicide that kills Virginia Button Weed and does not harm St. Augustine grass?
Celsius Herbicide is the most recommended product to treat Virginia Buttonweed in St Augustine grasses. Virginia buttonweed is notoriously hard to control and may require a second application after 2-4 weeks.

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181 of 189 people found this answer helpful

Is Celsius WG Herbicide safe for dogs?

Do I need to wait a certain amount of time before I can let the dogs back into the yard?

According the Celsius WG Herbicide label, you should keep children and pets off of the treated area until it has a chance to dry completely. This normally takes 2-3 hours depending on weather.

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160 of 178 people found this answer helpful

What is the shelf life of Celsius WG? How long is the shelf life in a typical hot garage?

Calculating the labeled max/yr and my lot size, I figure one bottle would be 4+ years worth.

Celsius should not be stored in a hot garage. Storing chemicals in hot temperatures will degrade the active ingredient and greatly reduce the efficacy of the product. When stored properly, out of extreme temperatures and out of direct sunlight, you can expect Celsius to last for about 3 years from the date of purchase.

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141 of 150 people found this answer helpful

How many applications (gallons) does a bottle of Celsius make?

How many applications (gallons) can you get from a single bottle of Celsius?

As with most herbicides the exact volume of water is not very important, you just need to be sure you are getting the correct amount of product on a specific area. Celsius may be applied at three different rates depending on the weeds to be controlled. For the appropriate rate and species consult USE RATES FOR WEED CONTROL section on the Celsius product label. For spot applications, add the specified product rate of 0.057-0.113 oz (1.6-3.2g) to enough water to create approximately 1 gallon spray solution. One gallon of spray solution will treat up to 1,000 sq ft. For maximum weed control with broadcast applications, add non-ionic surfactant.

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120 of 151 people found this answer helpful

See all 184 customer questions

Celsius WG Herbicide 4.5 out of 5 stars Rating: 4.3 (48 Reviews / 184 Q&A)

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