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Specific Weeds

What is Dollarweed and How Do I Control It?

Whether you call it dollarweed or pennywort, it’s an aggressive weed that loves to spread through moist shady areas of lawns and gardens.

Dollarweed growing in a lawn.

By Lorenzarius - Own work, CC BY-SA 3.0, Pennywort

Whether you want to call it dollarweed or pennywort, this perennial loves the water and thrives in warm temperate regions. Dollarweed is recognizable by its bright green, rounded leaves with wavy margins. Small, white flowers bloom from July to August. But they aren’t as innocent as they may look. Dollarweed spreads by creeping roots (rhizomes). They grow in moist shady lawns, gardens, and unplanted areas.

SEND DOLLARWEED PACKING: GET RID OF IT IN 3 STEPS

Illustration of dollarweed.
  1. Keep your lawn luscious

    The best way to get rid of dollarweed is to avoid it in the first place. Regular feedings, 2-4 times per year, provide the nutrients your lawn needs to grow thick to help crowd out dollarweed. Mowing at the height best for your lawn allows the grass to grow thick and develop a deep root system.

  2. Easy on the H2O

    Dollarweed is a water-loving plant and your lawn may not need as much water as you’d think. An inch of water per week is all that it needs. So see what Mother Nature has in store before turning on the sprinkler.

  3. Reach for Roundup® For Lawns

    Apply when the weed is young and actively growing for best results.

Getting Rid of Dollarweed in Garden Beds

For dollarweed growing in your garden beds, use Roundup® Ready-To-Use Weed & Grass Killer III with Sure Shot® Wand to kill them when they are young and actively growing.

Roundup® For Lawns Ready-to-Use
Roundup® For Lawns4 Ready-to-Use
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Roundup® For Lawns Concentrate
Roundup® For Lawns5 Concentrate
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Roundup® For Lawns Ready-to-Spray
Roundup® For Lawns6 Ready-to-Spray
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RoundupForLawns1 Ready-to-Use
Roundup® For Lawns1 Ready-to-Use
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Related Articles

Whether you are just starting out, maintaining or troubleshooting, you'll find advice and answers here for all your weed control needs.

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2021-01-17
2021-01-17
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The information on this site refers to Roundup® Weed & Grass Killer products and is for homeowner use. Always read and follow label directions.

*Consumer Guarantee: If for any reason you are not satisfied after using this product, simply send us original proof of purchase, and we will refund the purchase price.

Always read and follow label directions. Roundup, Roundup & design, FastAct, Roundup Extended Control and X design, Roundup® Precision Gel™, Pump 'N Go, Sure Shot and Draw the Line are trademarks of Monsanto Technology LLC. © 2020 Monsanto Company, worldwide rights reserved.