What Is A Pre-Emergent And Why Should You Apply It To Your Lawn? Our Master Gardener Weighs In
To prevent weeds year-round, you’ll need to spread pre-emergent in late summer and fall before seeds have a chance to germinate. You can use the same product for every season since pre-emergents are indiscriminate –- they will prevent every kind of seed from sprouting. In the spring, if you are already seeing early weeds, you have waited too long. The same is true for climates where hardy weeds grow throughout the winter.
The kinds of weeds that will be affected by your application of pre-emergent depends on your region. For those in northern climates, early spring application will prevent cool weather plants like henbit, annual bluegrass, purple deadnettle, and chickweed. For those further south, these weeds germinate and grow all winter. Fall application of pre-emergent before the temperatures start to drop will keep those same weeds from growing. Applying in both seasons in any climate will help prevent warm-weather weeds like crabgrass, dandelions, spurge, and much more.