Corn speedwell is a small, hairy winter annual with tiny blue flowers that's common in thin, dormant lawns.
- Scientific name
- Veronica arvensis
- Type
- Winter annual broadleaf
- Most visible
- February–May
How to Identify Corn Speedwell
- Small, rounded, toothed leaves
- Hairy stems
- Tiny blue flowers
- Low, branching growth
When It Shows Up in Oklahoma Lawns
Germinates in fall and flowers in early spring.
How to Control Corn Speedwell
- Apply a fall pre-emergent
- Spot-treat with a selective herbicide labeled for the weed and safe for your grass type, following the label exactly
- Keep turf thick with proper mowing height, watering, and feeding so seedlings can't establish