Quick answer
Dollarweed (pennywort) thrives in soil that stays wet. Cutting back on watering, fixing drainage, and keeping turf thick do more to stop it than any single spray.
Why It Appears
Dollarweed loves damp, low spots and lawns that get short, frequent watering. It's often the first sign that a sprinkler schedule is running too often.
How to Reduce It
- Water deeply but less often so the surface dries between cycles
- Check for leaking heads or low spots that stay soggy
- Mow at the right height so turf shades out weeds
- Spot-treat with a selective herbicide labeled for your grass type, following the label
Long-Term Fix
If an area stays wet after every rain, a drainage fix is usually the real answer. Weeds return when the conditions that favor them stay the same.