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Managing Dollarweed in Perennial Peanut Groundcover

The Challenge

Dollarweed (pennywort) thrives in moist, shady conditions—same as perennial peanut. No selective herbicide exists that kills dollarweed without harming peanut.

Organic Strategies

Hand-pulling: Persistent but effective if done regularly before seeding.
Improve drainage: Dollarweed loves wet soil; aerate, add organic matter.
Mulch heavily: Coarse wood chips suppress emergence.
Spot-treat with vinegar: 20% acetic acid on dollarweed only; shield peanut.
Flame weeding: Quick pass with propane torch on seedlings.

Research Note

New herbicides for peanut systems are in development (Hay & Forage Grower), but not yet widely available for home use.

Organic Gardens: Why Weed & Feed Is a Toxic Trap — And How to Have a Great Lawn Without It; Timing Glyphosate Application When Planting Spring Bulbs: Spray First, Then Plant; Accidental Weed and Feed Damage to Flower Beds: Why It Happens and What to Expect; Quick Organic Controls for Slugs, Caterpillars, and Weeds; Weed & Feed on Mixed St. Augustine and Bermuda: Label Must List Both; Timing Crabgrass Control After Spring Seeding; Dollarweed Encroachment and Algae on Walkways; Core Aeration and Overseeding for NC Lawns; Overseeding Thin Areas and Eradicating Invasive Warm‑Season Grass in Massachusetts; Understanding Weed-and-Feed Timing in Florida and an Organic Sugar Alternative

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