Don’t wait any longer. March/April is the optimal time to apply crabgrass pre-emergent for crabgrass prevention in the Denver area of Colorado.
According to Colorado State Extension:
“Preemergent herbicides kill very young weed seedlings but not seeds, so they must be “in place” prior to weed seed germination to be effective. One half to one inch of water from precipitation or irrigation is needed following application to move the herbicide off foliage and onto the soil surface, where weed seeds are germinating. Preemergent products should be applied during March or early April. Sites that warm earlier in the spring like southern exposures and turf near sidewalks should be treated in early to mid-March.”
I best get busy!
Last 3 posts by Andrea Kalli
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