Yes, Celsius herbicide is safe for use on St. Augustine grass.
Most herbicides including Celsius WG are not as effective for weed control when the temperatures are below 55 degrees and the weeds are not actively growing.
Celsius WG Herbicide is not labeled for tumblegrass. Unfortunately, we are not aware of any products on our website labeled for this type of grassy weed. You may want to reach out to your local Cooperative Extension office for recommendations on controlling this plant in your landscape.
No, Celsius WG Herbicide is not labeled for eradication of Poa Annua.
The Celsius WG Herbicide Product Label does not list a specific seeding interval for centipede grass like it does other grass species, however we would recommend giving the same time frame between application and seeding as it suggest for bermuda and zoysia. You would need to wait 90 days after an application of Celsius WG before putting down centipede seed. Otherwise if you seed first, you would need to give at least 3-4 weeks before applying Celsius, and ideally the new grass should have come up and been mowed at least twice if possible.
The label states that you will have to wait 90 days before overseeding after treating with Celsius WG Herbicide. If you have already overseeding, wait until 4 weeks after seeding or after your second mowing to apply to newly sprigged grass.
It is recommended to wait 90 days to overseed after applying Celsius WG Herbicide.
If the new St Augustine lawn has started to become established or been mowed at least once you can carefully spot treat with the Celsius WG on the newly laid sod. Anytime herbicides are used its best to wait 4-6 weeks or until the grass has been mowed 1-2 times.
Celsius WG Herbicide is labeled to control lawn burweed (spurweed). Please be sure to carefully read the product label before applying the product.
Celsius WG Herbicide is applied at 0.113 oz per 1000 sq ft for Virginia Buttonweed on St. Augustine lawns.
For spot treatments, mix 0.057-0.113 oz (1.6-3.2 g) of Celsius WG Herbicide per gallon and apply until weeds are wet. One gallon of spray solution will treat up to 1000 sq ft. Per the product label, a second application of this product may be needed for control. If weeds are showing signs of recovery, make a second application 2-4 weeks after the first.
Since Celsius WG Herbicide is not safe for cool season turfgrasses per the product label. It would be difficult to say for certain to what extent the inury could be to your lawn. Factors such as the mix rate that is was applied, weather temperatures and the overall health of your turfgrass If your turfgrass does not recover from the treatment, you can try reseeding after 28 days otherwise you would want to wait 90 days to reseed those areas.
People and pets should be out of the area while applying Celsius WG Herbicide until it has a chance to dry completely. This normally takes 4-6 hours depending on weather. While it is not an insecticide to kill insects, they could be injured if sprayed directly. It would be best to apply when they are not in the area, early morning or later in the evening.
To decrease the effects of Celcius WG Herbicide injuring the lawn, you could have possibly used an activated charcoal product within hours of the application and watered the area a lot. At this point, it may be too late, and only time will tell. We would recommend watering the area very well and contacting the manufacturer (Bayer) directly at 800-331-2867 for more information.
Celsius Herbicide should not cause fungus in your lawn when used as directed on the product label. For more information, we would recommend contacting the manufacturer (Bayer) directly at 800-331-2867.
With an herbicide like Celsius WG and many others, if sodding is not stated specifically on the label we recommend waiting at least 3-4 weeks after an application of Celsius before putting down the new zoysia sod.
In general the Celsius WG Herbicide is safe for people and pets so long as you keep them out of the area while applying the chemical, and until the product has had plenty of time to dry (normally a few hours). If your cat has any sensitivities we would recommend consulting your vet, otherwise the cat should be safe to eat the grass as long as its dry.
We would recommend storing Celsius WG Herbicide in it’s original container if possible as we do not have any information on transferring the product and the effectiveness and shelf life in another container. For more information, Bayer can be reached directly at 1-800-331-2867.
The seeding interval will vary depending on what type of turf you have. To rake you should wait until the weeds are completely dead. You should review the product label for specific directions for your turf. For example:
"Seeded Bermudagrass: This product may be applied to Bermudagrass up to 90 days prior to seeding without a significant reduction in Bermudagrass stand."
"Seeded Zoysiagrass: This product may be applied to zoysiagrass up to 90 days prior to seeding without a significant reduction in zoysiagrass stand."
