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How To Control Dollarweeddollarweed

If you live in a warmer climate such as in the south, you may be familiar with dollarweed, which is distinctive of its appearance with lily pad like leaves. When you are trying to keep a neat and uniform lawn, dollarweed can stick out like a sore thumb and ugly up you yard.

Dollarweed is attracted to moisture and can be quite tough to control once it becomes well established. It doesn’t help matters that dollarweed is able to quickly spread throughout the lawn and other areas by seed and rhizomes.

By arming yourself with knowledge about this invasive plant as well as professionally recommended herbicides, you can be able to control dollarweed and make sure the plant doesn’t make a return.

View our selection of herbicides which are listed to specifically target dollarweed and scroll further to learn more about dollarweed and what the best techniques are for cultural and chemical control.

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How To Get Rid of Dollarweed: Solutions 4 Step Process

Step One: Identification. Before you proceed with control and removal, it’s important to make sure that the weed you are experiencing on your lawn is in fact dollarweed and not some other similar looking invasive weed. Proper identification of the weed you wish to remove from your lawn will help you to understand what the weeds tendencies and characteristics are and can also point you in the right direction of which products can best treat that particular weed.

This is important because some common lawn weeds have a high tolerance or resistance to particular herbicides and control methods and are specifically labeled for certain weeds and not for others. If you misdiagnose the weed on your lawn as dollarweed when it isn’t, you may purchase a herbicide not meant to tackle it and it will lead to disappointing results and overall, a waste of money.


Dollarweed can be easily identified by it’s 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 can often be mistaken with another weed known as dichondra. One way to tell the difference between the two is by observing the leaf stem and where it is placed. Dollarweed has a stem located in the center of the leaf while dichondra’s stem is located at the edge.


As always, if you are unsure of what weed you have, you can contact us at identification@solutionsstores.com and send us a photo of your weed and we will identify it for you and suggest treatment options.


Step Two: Inspection. Once the plant has been properly Identified, you can then move to the inspection process. Dollarweed thrives on lawns that have excessive amounts of moisture. So ask yourself some of these questions: Are you overwatering your lawn? Does your lawn have drainage issues? If so then these are large contributing factors to the presence of dollarweed.


Scope out the areas that have the dollarweed growing and address the moisture issues as a start and dollarweed will start losing its grip on your lawn. If you only have a small amount of dollarweed, pulling them out by hand may suffice, any larger and the job becomes tedious. If it is particularly problematic infestation of dollarweed you are dealing with in your yard, then chemical control will be your best bet over hand-pulling.


Step Three: Control. There are a number of different herbicides you can use to control dollarweed. What you choose largely depends on where dollarweed happens to be growing. If dollarweed is appearing on your lawn, it is best to use a quality herbicide in the late spring when the weeds are younger and smaller. Herbicides are less effective the older and more mature the weed gets.


Our top recommendation is any product which contains atrazine. Atrazine can be applied to St. Augustinegrass and centipedegrass up to two times a year. For best results, Atrazine 4L Herbicide should be applied once in the fall and again in late spring (after spring green-up). Atrazine has a pre- and post-emergent effect on weeds, which means it helps to control both emerged weeds and weed seed.


The atrazine we carry are restricted use pesticides so if you aren’t able to use atrazine we recommend a three-way herbicide containing 2,4- D (2 4-D Amine Selective Weed Killer) or dicamba (3-D Herbicide Triplet Alternative). These products should be applied at a reduced rate to lessen the chances of damaging your desired grass. If a second application is needed, apply the herbicide in spot treatments. Repeated applications of a three-way herbicide should be spaced according to label directions. On flowerbeds, spot treatment with glyphosate will do just fine.


Step Four: Prevention. As noted earlier, dollarweed thrives in thinning turf that isn’t getting good nutrients and there is too much moisture. The best defense against dollarweed making a comeback is promoting a thick lawn that is well fertilized and maintained and moisture issues are addressed. Implement proper cultural lawn care maintenance practices such as infrequent watering, mowing high and fertilizing will go a long way and keeping your lawn strong enough to withstand dollarweed and other invasive weeds during the growing season.


Have Some Grassy Weeds You Want Gone? View Our Grassy Weed Control Section


Learn More About Dollarweed dollarweed on white

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. It spreads by seeds, rhizomes and tubers. Dollarweed grows small, white flowers which bloom in the summertime between July and August.


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.


Dollarweed is believed to originally be from Asia and was introduced to the mid-atlantic region from the country via imports and travel. There are a number of different species of dollarweed or pennywort such as coastal plain pennywort, water or many-flowered pennywort and whorled pennywort. No matter the species, all are aquatic dicot perennials with round bright leaves which appear to have scalloped edges.


Have A Lawn Issue That Isn’t Take All Root Rot ? Check out Our Lawn Care Main Category!

How to Conduct a Dollarweed Inspection

To inspect for dollarweed, you will need to watch out for erect, long-stalked, rounded, bright green, shiny leaves with veins originating from the leaf center. The round leaves look like tiny versions lily pads and have scalloped edges which look kind of like rounded teeth. The petiole in center of leaf resembles an umbrella. In the summertime, white flowers appear and are arranged as elongated spikes or as rounded umbels at the top of a long stalk. The fruit is greenish, rounded and somewhat flattened.


Dollarweed is usually found in areas that were very wet or anywhere there was excessive moisture. Dollarweed produces seed, but also has rhizome and tuber plant parts that aid in its propagation. Dollarweed is native to North America and can be found from Maine, south into Florida, and west to Minnesota and Texas, Utah, Arizona and California.


Better Safe Than Sorry: Equip Yourself With Protective Safety Equipment Before Spraying

dollarweed thrives in moist areasControl Methods To Remove 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.  You should also improve any drainage issues that may be present.


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.

Water less frequently

If you have a particularly large dollarweed issues, hold off on watering your lawn for at least two weeks. You grass will likely be able to tolerate this temporary dry spell, but dollarweed will not be able to. With the lack of moisture, dollarweed weakens, which makes it vulnerable to control herbicide products


After addressing and eliminating dollarweed using our recommendations, start up watering, but have a less frequent watering schedule and water less in general. Make it so your lawn only receives about an inch of water a week, either via rainfall or watering. Make sure that if it has rained that you don’t water soon after. This will give the water adequate water while still allowing it to dry out so dollarweed doesn’t thrive.


Dry soil conditions assist your lawn in developing deeper roots, helping it to better choke out weeds that are attempting to invade. Improving the drainage in your soil to help eliminate the wet soil conditions will also help reduce or eliminate future dollarweed issues.


Make Sure You Have The Right Equipment For The Job. SHOP For Sprayers and Other Lawn Care Essentials

Mow On A Higher Setting

Mowing at the height best for your lawn allows your turf to grow thick and develop a deeper root system to fight off invading weeds like dollarweed. 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.


Don’t Handpull Dollarweed

Handpulling may seem like a good idea, especially if you only have a small outbreak of dollarweed, but it may very well be a waste of time because if you only miss a portion of the plant when pulling, it will just grow back.


You may think you’ll take your chances and pull anyways but the problem is that dollarweed lives primarily below the ground. At least 90% of the plant is under the soil. You likely will need a chemical herbicide which can travel all the way down to the root system to kill the entire plant and prevent the possibility of regrowth.

Don’t Use Home Improvement Store Herbicides

It can be easy to just take a trip to your local gardening center or aisle of your nearest big box stores to try to find a herbicide to eliminate dollarweed, but getting this general generic weed killers will provide little help and may just leave you disappointed.


This is because weed products in these stores are a much more watered down products. You’re essentially just paying for the label and packaging and not getting the punch that you want to really deal damage to dollarweed like our concentrated professional herbicides do.


Another reason is that dollarweed and other weeds can be resistant to these weaker quality consumer herbicides and will not be strong enough to translocate--in other words, move throughout the entire plant. It will just knock the top off that you see visibly out of the ground while the underground 90 percent remains intact and before you know it the dollarweed has returned.


Persistency, consistency and a professional quality herbicide is the best combination of tools needed to control dollarweed. A persistent “never give up attitude” is required when the dollar weed seems to reappear after each application.


Repetitive consistent effort is the only way to defeat the underground dollarweed roots and stems and keep them from regenerating on your lawn. For more expert advice and tips, you can always contact us at askapro@solutionsstores.com, call us by phone or live chat with a representative who is standing by and eager to help!


Additional Dollarweed Resources:

Killing Dollar Weeds: Tips For Getting Rid Of Dollar Weed


Foraging Texas: Dollarweed


Auburn University Turfgrass Management | Pennywort or dollarweed

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