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Controlling Crabgrass After It Sprouts

If crabgrass appears despite a spring pre-emergent application, a second pre-emergent treatment now can still suppress it. Dithiopyr is unique in also killing small, emerged crabgrass seedlings.

Strategy

Apply a second pre-emergent immediately.
Repeat pre-emergent every March.
If seedlings are visible, use dithiopyr for early post-emergent control.

Consistent annual timing is key to long-term management.

About Gardening: Organic Crabgrass Prevention: Corn Gluten Timing and Mowing Practices; Weed Control After Overseeding: Timing and Strategy for a Healthy Lawn; Corn Gluten Meal for Crabgrass Control: Does It Work and When to Apply?; Crabgrass Control: Prevention, Cultural Practices, and Herbicide Strategy; How to Propagate Ferns from Spores: A Patient Gardener's Guide; Crabgrass Control in the Vegetable Garden; Avocado Seedling Care: Pinch for Bushiness; Crabgrass Identification and Prevention in Bermuda Lawns; Crabgrass in Bahia Grass: Pre-Emergent Only Option; How Siduron Controls Crabgrass Without Harming Fescue

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