Dollar Weed Seeds

Dollarweed (Pennywort) Pennywort, also called dollarweed, is a summer perennial weed. The leaves of pennywort are round in shape, approximately 1 inch in diameter. The dark green leaves are why expose yourself and your family to pesticides when simply managing irrigation will fix the problem of dollarweed. Dollar weed,is a perennial weed that commonly pops up in moist lawns and gardens. This weed is often difficult to control once it becomes well established. Find out how to control it here.

Dollarweed (Pennywort)

Pennywort, also called dollarweed, is a summer perennial weed. The leaves of pennywort are round in shape, approximately 1 inch in diameter. The dark green leaves are glossy, with scalloped edges and are on long slender petioles. The petiole of pennywort is attached to the center of the leaf, not to be confused with dichondra in which the petiole is attached to the edge of the kidney shaped leaf.

The pennywort flower is small with 5 white petals and forms in clusters on the end of long stems. Pennywort spreads by seed and rhizomes.

Pennywort is found along the Atlantic coast from Maine to Florida and westward to Minnesota, Texas, Utah, Arizona and California. Pennywort is also found in Nova Scotia, British Columbia, the West Indies, Mexico, Central and South America and Southern Europe and Tropical Africa.

Integrated Pest Management Control Recommendations:
Cultural Practices:

Avoid excess moisture. Pennywort thrives in wet areas. Improved drainage may help to prevent infestation of pennywort.

Herbicide Use:

Use a postemergent broadleaf herbicide appropriately labeled for the turfgrass species.

Recommendations

For post-emergent clover, chickweed and other broadleaf weed control, especially in sensitive warm-season turfgrass areas on golf courses, residential and commercial lawns, sports turf and park and recreation areas.

Trimec Southern is designed for high tolerance in sensitive southern turfgrasses. But that doesn’t mean it won’t control tough weeds anywhere else. In fact, recent research has shown that Trimec Southern is the most effective amine Trimec complex for clover control, equaled only by our Super Trimec ester product.

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For optimum control, make your herbicide application when pennywort (dollarweed) is actively growing and in the one leaf to flower stage of growth.

Gardening in Florida: How do I get rid of dollarweed?

Q: Reading your clover article reminded me of my problem with dollarweeds growing throughout my yard. I’ve looked at various things to apply without killing the grass. Do they really work? What would you recommend applying in those random areas?

— Pete

A: Dollarweed is a vexing problem and is always found in wet or constantly moist conditions. Known as pennywort and Hydrocotyle umbellate to horticulturists and scientists, this interesting plant is native from Maine to Florida, and west and south to Minnesota, Texas, Utah, Arizona and California. It is also found in Nova Scotia, British Columbia, the West Indies, Mexico, Central and South America and Southern Europe and Africa.

Dollarweed is an endangered species in Connecticut and Ohio, but here in Florida it is a prolific and tenacious weed. It is an herbaceous perennial found in its native habitat in aquatic or wet locations. Leaves are peltate which means the leaf stems attach in the middle of the leaf, round with scalloped edges, bright green, 1 to 2 inches in diameter. The flowers are small, star-shaped with five white petals which produce an abundance of tiny seeds.

The plant spreads throughout stressed and over-watered lawns by means of seeds and running underground stems known as rhizomes. Dollarweed can and often does eventually form large mats of vegetation. It can also be brought to the landscape via mowing equipment, but will only take root if conditions are right for growth; dollarweed is an aquatic plant.

The best control for dollarweed, as it is for most lawn weeds, is prevention. A healthy, thriving turf, including appropriate irrigation will produce an environment where ddollarweed is unlikely to grow.

Best management practices for Florida lawns include mowing right, for most St. Augustine varieties 3.5 to 4 inches tall, fertilize when needed, 2 – 4 times year with a slow-release product, plenty of sun 6 to 8 hours per day, and water only when the turf needs it.

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It is often said if a lawn has dollarweed, there is too much water. New research has finally put this adage to test. In one trial, the plots that received irrigation only when the grass was extremely wilted, averaging about one application per quarter had less than 2% cover of dollarweed. The plot, which received daily applications of water had in excess of 30% cover of dollarweed.

Using recommended irrigation practices can reduce the incidence of dollarweed. Apply irrigation only when the turf needs it and then apply enough water to fully wet the soil. As a guideline, start by applying ½ to ¾ of an inch of water 2-3 times per week in summer and every 10 – 14 days in winter. Watch the lawn to fine-tune the application looking for signs of wilt, turf thinning, and an increase weed growth.

There are herbicides which will control dollarweed, check the University of Florida publication about dollarweed for recommendations at http://edis.ifas.ufl.edu/pdffiles/EP/EP38900.pdf.

However, why expose yourself and your family to pesticides when simply managing irrigation will fix the problem.

Carol Cloud Bailey is a landscape counselor and horticulturist. Send questions to [email protected] or visit yard-doc.com for more information.

Eliminate Dollar Weed – How To Kill Dollar Weed

Dollar weed (Hydrocotyle spp.), also known as pennywort, is a perennial weed that commonly pops up in moist lawns and gardens. Similar in appearance to lily pads (only smaller with white flowers), this weed is often difficult to control once it becomes well established. In fact, it can quickly spread throughout the lawn and other areas by seed and rhizomes. Nonetheless, there are several options available to treat dollar weed should it become a problem for you.

Getting Rid of Dollar Weed Naturally

Since this weed thrives in overly moist areas, the best way to treat dollar weed is by reducing moisture in the affected area with proper mowing and irrigation. You should also improve any drainage issues that may be present.

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In addition, dollar weed can be easily pulled up by hand, though this can be tedious and in larger areas, it may not be feasible. Organic control involves methods that may work for some while not others, but it’s always worth a try to see if one will work for you before resorting to chemicals. These methods include the following:

  • Boiling water – Pouring boiling water on areas with dollar weed will quickly kill the plants. However, care should be taken not to get any on other nearby plants or grass, as boiling water will kill anything it comes into contact with.
  • Baking soda – Some people have had luck with using baking soda for killing dollar weeds. Simply wet down the dollar weed foliage and sprinkle baking soda over it, leaving it overnight. This is supposed to kill the weeds but be safe for the grass.
  • Sugar – Others have found success with dissolving white sugar over the weed. Spread the sugar over the area and water it in thoroughly.
  • Vinegar – Spot treating dollar weed with white vinegar has also been deemed effective as a dollar weed herbicide.

How to Kill Dollar Weed with Chemicals

Sometimes chemical control is necessary for killing dollar weeds. Most types of dollar weed herbicide are applied in spring while the plants are still young, though repeat applications may be needed. Monument, Manor, Blade, Image, and Atrazine have all been found to effectively eradicate this weed. They are also safe for use on Zoysia, St. Augustine, Bermuda, and Centipede grasses (provided you carefully follow instructions).

Note: Chemical control should only be used as a last resort, as organic approaches are safer and much more environmentally friendly.