Bayer Advanced Southern Lawn Concentrate Weed Killer is labeled for St. Augustine but is NOT to be used on Floratam version of St. Augustine. If you are uncertain of which type of St. Augustine grass you have, we recommend you contact your Master Gardener here for proper identification. Both of these types of turf lawns are very sensitive and can be damaged very easily.
Below are some characteristic differences between the two versions of Saint Augustine Grass.
Saint Augustine Grass:
This broad-bladed, medium-green turf grass thrives in sunny locations, but unlike some sun-loving grasses, it also has a high shade tolerance. Common St. Augustine grass grows quickly during summer, but more slowly in fall and spring. It is a salt- and drought-tolerant grass that requires moderate maintenance.
Floratam Saint Augustine:
Floratam is coarse-textured grass, but a distinguishing feature of Floratam is its longer and wider leaf blades. This dark-green cultivar grows rapidly in both spring and summer. It is less cold and shade tolerant than other St. Augustine grass cultivars and can suffer from freeze damage when temperatures stay below freezing for an extended period of time. Floratam needs plenty of sunshine and will perform poorly if it receives less than six hours of sunlight a day.
Bayer Advanced Southern Lawn Concentrate Weed Killer rates are as follows depending on your grass type:
Fescue, Kentucky Bluegrass, and Perennial Rye: 2 oz. (4 tbsp.) per gallon of water per 500 sq. ft.
Bermuda, Buffalo and Zoysia: 2 oz. (4 tbsp.) per gallon of water per 500 sq. ft.
Bahia, Centipede, and St. Augustinegrass: 1 oz. (2 tbsp.) per gallon of water per 500 sq. ft.
Bayer Advanced Southern Lawn Concentrate Weed Killer is not labeled to control sandspurs. Per the product label bare spots may be seeded 3 to 4 weeks after application. You can use a product called HI Yield Atrazine Killer which is labeled to treat for Sandspur and can be used in Centipede and St Augustine lawns. Please let us know if you have a different type of grass and we can recommend a different product.
Bayer Advanced Southern Lawn Concentrate Weed Killer can be used now if you have weeds that are actively growing now and the lawn is established. The product label states that it is safe to use on St. Augustine grass (except for the Floratam variety).
Yes, Bayer Advanced Southern Lawn Concentrate Weed Killer is labeled to eradicate dogfennel. The dilution will depend on the turfgrass that you have. Please refer to the product label for complete mixing and application instructions.
As listed on the Bayer Advanced Southern Lawn Concentrate Weed Killer product label the max rate used is 1-2 oz per gallon of water per 200 sqft depending on your turf grass.
You should keep pets out of the treatment area while using Bayer Advanced Southern Lawn Concentrate Weed Killer and until the application is completely dry, usually about 1-2 hours.
Bayer Advanced Southern Lawn Concentrate Weed Killer is labeled for use on St. Augustine grass without harm.
Unfortunately, the Bayer Advanced Southern Lawn Concentrate Weed Killer is not labeled to kill sandspur. Youmay want to consider a product called HI Yield Atrazine Killer instead.
Bayer Advanced Southern Lawn Concentrate Weed Killer should be applied when the targeted weeds are actively growing, temperatures are below 90 degrees and there is no rainfall expected for 24 hrs following the application.
Bayer Advanced Southern Lawn Concentrate Weed Killer has a shelf life of 3-5 years if left in a cool dry area.
It can take up to 14 days to start seeing results after application of Bayer Advanced Southern Lawn Concentrate Weed Killer
