Broadleaf Weeds - St Augustine Lawn - Corn Speedwell
BES-TEX Weed ID Guide · Broadleaf Weeds
Corn Speedwell
Veronica arvensis
Winter annual Broadleaf
Common Name
Corn Speedwell
Latin Name
Veronica arvensis
Family
Plantaginaceae
Life Cycle / Type
Winter annual · Broadleaf
What Is It?
Corn speedwell is a low-growing winter annual broadleaf weed with small, rounded, slightly hairy leaves and tiny blue to lavender flowers. It grows close to the ground and commonly appears in thin turf, compacted soils, and cool-season conditions, often going unnoticed until flowering.
Soil Temperature & Germination
Corn speedwell germinates as soils cool in the fall.
Below 55°F
Germination begins
Cool winter soils
Continued establishment and growth
Decision Question
Is the weed visible above the soil right now?
Why This Weed Comes Back
Missed fall pre-emergent timing
Thin or compacted turf
Bare or disturbed soil
Learn the Basics
A healthy, thick lawn is the best defense against weeds.
