Dollarweed Control: How to Get Rid of Dollarweed

This page is a general Dollarweed control guide. Using the products and methods suggested, you will get control of Dollarweed. Follow this guide and use the recommended products, and we guarantee 100% control of dollarweed.

Living in an area with warm temperatures and access to bodies of water is the perfect environment for dollarweed. Commonly known as pennywort, dollarweed gets its name from the shape it takes. The round leaves are glossy and similar in size to a silver dollar. This weed can float and be tricky to deal with.

You're most likely dealing with dollarweed issues because there is too much water in your lawn. This can be caused by several things such as soil not draining properly, too much rain, or thin turf. One factor that makes dollarweed hard to control is the way it spreads. This weed uses both seeds and underground roots to spread, which means treatment needs to be effective to completely remove dollarweed from your lawn.

If you are dealing with a dollarweed outbreak in your yard, follow our DIY guide for professional product suggestions and expert instructions for quick and effective removal.

Identification

It is important to make sure that the weed infesting your lawn is dollarweed. Misidentification can lead to using the wrong products and methods to effectively remove it, costing your time and money.

• Dollarweed, also known as pennywort, is a perennial warm-season weed that gets its name from the silver dollar-like shape of its leaf.
• Dollarweed is dark green and resembles a tiny lily pad.
• Dollarweed grows small, white flowers that bloom in the summertime between July and August.
• Dollarweed is commonly mistaken for another weed called dichondra. You can tell the two apart by taking a look at their stems. While dichondra stems are found at the edge of their leaves, the stem from dollarweed can be spotted from the center of the leaf.
• Dollarweed is a water-loving plant and can float.
• When it is found in St. Augustine grass, this is usually an indication of high levels of moisture in the turf.
• The creeping stems of dollarweed root into wherever their nodes come in contact with the soil, increasing the number of weeds in a very short amount of time.

Use the description and image above to make sure the weeds in your lawn are dollarweed. If you are not entirely sure, contact us and we will help you with proper identification.

Inspection

After correctly identifying dollarweed, take a closer look at your turf to find spots where this weed is most active. This will help you to figure out where to focus your herbicide treatment.

Where to Inspect

Search areas in your lawn with high moisture content. Sections where the soil has too much water will be a perfect spot for dollarweed to emerge. Spots where your grass is cut too short is also a popular area for this weed.

What to Look For

Keep an eye out for a weed that looks like a small lilypad. Its leaves will be glossy and green with wavy edges. Dollarweed will most likely be grouped together.

Treatment

After you have inspected your yard for dollarweed, you can proceed with treatment. Be sure to wear the proper personal protective equipment (PPE) before handling or applying any product.

To effectively get rid of dollarweed, we recommend using either msm turf herbicide or Fahrenheit herbicide.

Msm turf herbicide is a selective herbicide that will not harm your grass. It can cover up to one acre of turf. You can apply this product with a hand pump, hose-end, or backpack sprayer.

Fahrenheit is water soluble granule that offers more application variety and can also be used for large volume applications, like treating acreage.

For most average applications, we recommend using either herbicide with a 1 gallon pump sprayer so you can make targeted spot applications easily.

Step 1 - Measure the Area For Treatment

Before applying product, calculate the square footage of the area you want to treat. You can do this by multiplying the length and width together (length x width = square footage). This will determine how much product you will need to mix with water.

The mix rate for msm turf herbicide is 0.5 to 1 oz. per acre. For example, if you wanted to treat a 2,000 square foot area, you would mix 1 oz. of msm turf herbicide with 16 ounces of water in a hose-end sprayer. Each solution can only contain 1 oz of msm turf herbicide. If you needed to treat more than 2,500 square feet, you would need 2 separate solutions with 1 oz of msm turf herbicide each.

For applications with Fahrenheit, use 6 to 12 oz. of product per acre.

Step 2 - Mix Herbicide

After calculating the amount of msm turf herbicide you will need, you can begin to create your solution. Fill your pump sprayer with a half gallon of water and then mix the measure amount msm turf herbicide into the sprayer. Add the remaining half gallon of water to the sprayer and then agitate the sprayer until the solution is well mixed.

To mix Fahrenheit, use the supplied measuring cup to measure out how much product you need. Simply attach the mouth of the cup to mouth of the bottle, and flip the bottle upside down to fill the measuring cup without spilling product.

Step 3 - Apply Herbicide Solution to Dollarweed

Now that you've mixed your herbicide, you can begin to spray the area you want to treat. Use a fan spray setting in order to get even coverage.

Spray your grass until it is wet, but not to the point of runoff. Move at a steady pace when treating your lawn.

Do not water your lawn for 24 hours to allow the weeds to absorb the product. You should see results in 2 weeks. You may need to reapply after 21 days.

Prevention

After treating your lawn, you want to make sure that dollarweed does not return. Here are some preventative steps to protect your turf.

• Because dollarweed is attracted to thin grasses, thickening your turf is a great way to prevent this weed from returning.
• Be sure to have a good mowing height, as turf with low height can become susceptible to being invaded by weeds. St. Augustine grass are best when mowed at 3 to 4 inches. Zoysiagrass and centipede lawns do best when mowed at 2 to 3 inches, and bermuda lawns prefer a 1.5 to 2 inch height.
• Make sure that your lawn is not too saturated with water. You can avoid this by introducing an irrigation system or aerating your soil.

Key Takeaways

What is Dollarweed?

• Dollarweed is an invasive perennial weed identified by its silver dollar-shaped leaves, which is why their name is coined as such.
• Dollarweed leaves are round, bright green, fleshy and look like smaller versions of lily pads measuring 1-2 in diameter with a scalloped edge. It tends to grow low to the ground and can be spread via seeds, rhizomes and tubers.
• Dollarweed is usually found in areas that were very wet or anywhere there was excessive moisture. This weed spreads through a root system and by seeds, which makes it difficult to control.

How To Get Rid of Dollarweed

• Handpulling dollarweed is largely ineffective so using chemical methods of control is the best way to remove dollarweed from your lawn.
• Mix msm turf herbicide or fahrenheit with water to control dollarweed. Use a fan-spray setting on a hand pump sprayer for best results.

How To Prevent Dollarweed

• Because dollarweed tends to survive in parts of landscapes that are very damp and moist, the best way to treat dollarweed is through addressing moisture issues in the areas where they are growing with practice such as proper mowing and watering.
• Prevent the re-emergence of dollarweed by keeping your lawn at a taller height and aerating your soil.