Pre-Emergent Guides by State

When to apply pre-emergent herbicide depends on where you live. Find your state below for local timing, recommended grass types, and expert resources.

Quick Links

Warm-Season States

Apply pre-emergent early (Jan-Mar). Warm-season grasses dominate.

Cool-Season States

Apply pre-emergent later (Apr-May). Cool-season grasses dominate.

Transition Zone States

Both warm and cool-season grasses grow. Timing varies by grass type.

Dry / Western States

Dry climate with lower weed pressure. Timing varies by elevation.

Get Precise Timing

State-level guides give you a general window, but your exact timing depends on local weather conditions. Use our GDD tracker with your ZIP code for the most accurate recommendation.

Check Your ZIP Code