Celsius WG Herbicide - Questions & Answers

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.

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.

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.

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.

Per the Celcius WG Herbicide product label: MOWING INSTRUCTIONS: Do not mow immediately after treating with this product or before spray has dried. 

Typically you should 1-2 days before and after applying.

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.

Celsius will become rainfast approx. 4-6 hours application. For best results, be sure to mix in a surfactant like Non Ionic Surfactant for Herbicides.

For certain weeds, a second application made 2-4 weeks after the initial application may be needed for complete weed control. Total amount of product applied in a calendar year (365 days) must not exceed 7.4 oz (210 g) of product per acre.

The Celsius on its own will kill the weeds as that is what it is designed to do as an herbicide. If you want accelerated control you can mix a surfactant with the product for better stick.

Celsius, like most herbicides should not be used in temperatures 85F degrees and over.

Celsius is labeled for use on Bermuda grass to control large crabgrass and should not harm the Bermuda as long as you follow the product label.

This product will not work well in a hose end sprayer because those sprayers are not accurate enough to apply the correct amount of product. You will need to use a hand pump sprayer and uniformly spray the product over the specified area.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.

There are conversion charts on page 6 of the product label for Celsius WG Herbicide to convert the label rates to teaspoons. The 0.057 oz amount is equal to ½ teaspoon.

Celsius is a professional product and the manufacturer does gear it toward the professional applicator, including the measuring cup. Unfortunately we have no control over this because we do not manufacture the product. Our other customers have told us that they have been able to get small medicine syringes from the pharmacy to measure the smaller amount that they require.

Celsius WG Herbicide is best applied when rain is not expected within 48 hours after applying.  

Per the Celsius WG Herbicide product label, you can actually add a fertilizer to the finished solution for application. For certain weeds, a second application made 2-4 weeks after the initial application may be needed for complete weed control. Total amount of product applied in a calendar year (365 days) must not exceed 7.4 oz (210 g) of product per acre.

Celsius is labeled to eradicate crabgrass and dallisgrass as a post emergent in most St. Augustine lawns.  You can purchase it right from our website here.

Yes, Celsius WG Herbicide will eliminate spurge in a centipede grass. This is safe for use in centipedegrass and will not harm it. 

With Celsius WG Herbicide, you will use 0.113 oz., or 3.2 g. of product per gallon of water. 

We would recommend that you apply Celsius WG as a post emergent control to treat doveweed in your St. Augustine lawn. Please refer to the product label for more detailed information on treatment.