When should I apply a preemergent herbicide?
When is the best time to apply a preemergent herbicide in the spring?
Sussex County Delaware
To control summer annual weeds in you lawn, apply a pre-emergent herbicide in Mid-March to mid-April. Depending on your location and spring rainfall you may need to make an additional application within 60 days. To ensure environmental and personal safety follow the application and personal protection directions on the container. For fuller information about maintaining a healthy lawn see http://extension.udel.edu/factsheet/weed-control-in-turf/