Pre-emergent applications are applied twice a year, up to 3 times a year in some regions, sometime in late fall and early spring. Please contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region.
Ferti-Lome Winterizer and Weed Preventer II 10 - 0 -14 is applied to a dry lawn and does need to be watered in after application by irrigation or rainfall per the product label.
Ferti-Lome Winterizer and Weed Preventer II For Southern Grasses could be used after a post-emergent application as it is a pre-emergent herbicide and winterizer.
Ferti-Lome Winterizer and Weed Preventer II For Southern Grasses is only available in 16 lb bags. This will cover up to 4,500 sq. ft.
Ferti-Lome Winterizer and Weed Preventer II For Southern Grasses is labeled for established Zoysia lawns. It is also great for prevention of prostrate spurge, garden spurge and spotted spurge.
Ferti-Lome Winterizer and Weed Preventer II 10 - 0 -14 is safe for pets if used as directed. They should not be present during application and while surfaces are wet. Once completely dry, it is safe for their return to the treated areas.
Ferti-Lome Winterizer and Weed Preventer II 10 - 0 -14 is safe to use on St Augustine and does not have a restriction for Floratam.
We would suggest consulting with your county cooperative extension office for proper identification of the cause of brown spots prior to applying any fertilizer. These spots could be from lawn disease or insects in the soil so a positive id would be best.
The Cooperative Extension Office can also perform soil tests to determine your soil nutrient needs for fertilizing the turf.
Per the product label, Ferti-Lome Winterizer and Weed Preventer II 10 - 0 -14 can be applied in the early fall, in August and up to November but that depends on soil temperatures and when you're expecting the first frost. In the north, typically between August and September is best, especially because this product is also a pre-emergent, but we do also recommend checking with your local extension office for the best time to make an application.
As long as the centipede grass has become established and has been mowed at least twice, you can safely use a pre emergent such as the Ferti-Lome Winterizer and Weed Preventer II 10 - 0 -14 without harm.