A pre-emergent is a weed killer that targets the weed seeds already in the soil from the previous year. To get ahead of those summer weeds applying a pre-emergent in early March or once your soil temperature reaches about 52 degrees, will destroy the weed seeds. The pre-emergent MUST be applied before the weeds emerge. Once the weeds have emerged a pre-emergent will not have any effect on the weeds.
Pre-emergent applied in the early spring will control weeds such as, crabgrass, dandelions, foxtails, goose grass, clover, plantains and many more. Be sure to read the label on the pre-emergent to verify what type of grass it is safe for, the types of weeds it destroys and the proper application instructions. A pre-emergent will not harm Amazoy zoysia grass because it does not propagate from seed.
Multiple applications will best control the wide variety of weeds and their varying germination periods.
This simple step can save you a lot of aggravation, time and energy allowing you to enjoy a more beautiful lawn.