Weed Control for Cool Season Lawns
Don't use granular weed-killing products or 'weed and feed' combos — they don't work well. Prefer liquid weed killers. Always read the label. Most weed killers should NOT be applied above 85°F or during heat stress. Process: identify weeds first using Weed Alert / Weed ID, then use ready-to-spray hose-end bottles from most stores.
Frequently Asked Questions
Why are liquid herbicides better than granular?
Liquid herbicides coat the weed leaf surface evenly for better absorption. Granular weed-and-feed products rely on granules sticking to wet leaves, which is inconsistent and often leads to poor coverage.
What temperature is too hot to spray herbicide?
Most broadleaf herbicides should not be applied when temperatures exceed 85 degrees F. High heat increases the risk of lawn damage and reduces herbicide effectiveness. Early morning application is safest.
How long after spraying herbicide before I can mow?
Wait at least 24-48 hours after spraying before mowing. The herbicide needs time to translocate through the weed plant. Mowing too soon removes the treated leaf tissue.
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