Best Time to apply pre-emergent herbicide for weed control?
In Northern Utah, the best time to apply pre-emergent herbicide for weed control depends on soil temperature. You should apply it when soil temperatures reach around 50-55°F for a few consecutive days. This typically happens:
- Spring Application: Mid-to-late March to early April (depending on weather conditions)
- Fall Application (optional, for winter annuals like poa annua): Late August to mid-September
Ferti-lome Crabgrass Preventer 32 LBS. $56.99
Covers 10,000 SQ. FT.
broadcast or drop spreader on a dry lawn. Lightly water within 24–48 hours to activate the herbicide but avoid heavy rainfall and soil disturbance like raking or aerating. For season-long control, apply a second treatment 8–10 weeks later.
Ferti-lome Crabgrass Preventer 16 LBS. $34.99
Covers 5,000 SQ. FT.
broadcast or drop spreader on a dry lawn. Lightly water within 24–48 hours to activate the herbicide but avoid heavy rainfall and soil disturbance like raking or aerating. For season-long control, apply a second treatment 8–10 weeks later.
Caution for Overseeding
If you plan to overseed, avoid applying Ferti-lome Crabgrass Preventer at the same time. This product prevents seed germination, including grass seed. Wait at least 8–12 weeks after application before overseeding or use a seed-friendly pre-emergent if needed. Always check the product label for specific reseeding intervals.
