Veronica arvensis
broadleaf weedUSDA zones 3–9Active: spring, winterWinter annual speedwell with tiny blue flowers. One of the most common lawn speedwells. Germinates in fall, blooms in spring, dies in summer.
Very small, hairy, triangular leaves; tiny blue 4-petaled flowers; low upright growth; heart-shaped seed capsules.
Dense fall turf prevents corn speedwell germination. This winter annual germinates in fall.
When: Overseed in early fall
Shallow-rooted and easy to pull. Remove in early spring.
When: Pull in early spring before seed set
More effective than 2,4-D on speedwell species.
When: Apply in fall or early spring when actively growing
Active ingredient: Triclopyr — e.g. T-Zone
Grass safety: always match herbicides to your grass species — products safe on Kentucky bluegrass can kill St. Augustine or centipede. Lawn Guardian checks this automatically against your lawn profile.
Lawn Guardian turns this guidance into a schedule timed to your USDA zone and this week's actual weather — and adapts every time you log what you've done.
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