When it comes to my lawn, I’m pretty much a live and let live kind of guy. If it’s green, it stays — and for decades my policy has worked. I haven’t had to use poisons. Insects and wildlife seem to appreciate the blend of greens and flowering weeds. Most importantly, it’s the one aspect… 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 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.
Nitty Gritty Dirt Man
The incredibly true misadventures of a home gardener.
Dollarweed Makes No Sense
When it comes to my lawn, I’m pretty much a live and let live kind of guy. If it’s green, it stays — and for decades my policy has worked.
I haven’t had to use poisons. Insects and wildlife seem to appreciate the blend of greens and flowering weeds. Most importantly, it’s the one aspect of gardening and home ownership that has remained stress-free.
I refuse to be a suburban slave to my lawn — at least that’s what I said until dollarweed entered my life.
I had never heard of dollarweed — also called pennywort — until I moved to Florida. In my Long Island lawn and garden, I had dandelions, clover, and crabgrass — but never dollarweed.
I first spotted dollarweed on the packaging of a weed-and-feed product. I wasn’t interested in purchasing the stuff, but I thought it strange that a weed was featured so prominently on the front with the words: “Even kills dollarweed.”
Wow, I thought, how bad can a weed be? Is it possible for a weed to be so terrifying and invasive that it could get top billing on the front of a bag of weed-and-feed? If there was such a weed, I breathed a sigh of relief that I didn’t have any in my yard.
There was that one weed — the one I noticed creeping through some of the beds; the one that when I pulled on it, the long, tender stem would break; the one that had roots developing at various points along the length of its stem; the one that I incorporated into my weeding game — just how much length of the weed could I pull out in one try?
Could that be dollarweed?
I compared my weed to the weed on the packaging and to online images — and the more I looked, the more it seemed my yard was awash in dollarweed. It rambled over bromeliads and quickly became kudzu-like in succulent-filled pots.
It appeared in the lawn, where it grew in large patches, weaving its way between blades of grass.
How could it spread so quickly — and one day while I was weeding, the answer was literally in the palm of my hand. Dollarweed seeds are very small and they stick to everything — and while weeding, I noticed them on my fingers, clothes, and sandals.
If the seeds could so easily stick to me, then there was a good chance the seeds were also clinging to the underside of the lawnmower.
I started researching and learned that dollarweed thrives in moist conditions. In fact, its presence in a lawn indicates poor drainage or overlapping sprinkler head zones.
That’s when it all hit me. Dollarweed wasn’t the enemy. I was. I was responsible for spreading dollarweed throughout my yard simply by doing my chores. I had provided the perfect environment for it.
It may as well have been my face on the package of weed-and-feed.
Now that I know I have a sort-of parasitic weed that lives because of me, what was I to do? Adding poison to the lawn went against my long running policy. Besides, one website even described dollarweed as the punch line in the corporate offices of poison producers. The toxins are only a temporary fix for a weed destined to return again and again. It seemed one man’s dollarweed is an industry’s dollar maker.
My solution at the moment is to clean up my gardening act:
- Clean the underside of the mower after every mow;
- Be aware of where I walk so I do not inadvertently transport dollarweed seeds around the yard;
- Use a hand trowel to help remove dollarweed and its runners and roots from the beds;
- Experiment with regular applications of vinegar to problem areas;
- Adjust the sprinkler heads and correct drainage issues.
When it comes to gardening, the last thing I want is to be dollarweed foolish and pennywort unwise.
10 thoughts on “ Dollarweed Makes No Sense ”
Ha, a funny post about what looks like quite a serious weed! Props to you for trying to get rid of it without resorting to chemicals. Good luck!
That weed looked awfully familiar to me so I just checked my well-thumbed copy of Weeds of the Northeast and dollarweed isn’t in the Index. Also checked its alternate nickname of “pennywort”…nope. There’s “pennycress” and “thoroughwort” but no pennywort. Guess it is one of those ‘blessings’ of living in the South?
What I want to know is, when did inflation alter your weed’s nickname from Pennywort to Dollarweed?
Haha. Good one, M’Lady!
I learned about dollarweed around the same time you did. It is also very “popular“ in hungary. My only (temporary) solution is currently weeding with a rake.
How is your experience with it in the last 4 years?
Hi there. What I have found works the best is mowing my lawn at a higher setting. My lawnmower has a recommended height, but I adjusted it to the next height setting. It means that I have to mow more frequently, especially in summer and to keep the weeds from flowering and self-sowing, but keeping my grass longer seems to make it healthier so it chokes out the weeds. In addition, the height also creates deeper shadows in the grass, preventing sunlight from helping to germinate the weed seeds. I hope this helps.
Thank you. This is what I tried also. Unfortunately (fortunately) I’m living in a relatively moist area, therefore in case there is a small shadow on the grass, then there’s just enough water for the dollar weed.
We just had a month of drought combined with my rake, I’m more or less free of it now.
You really did your homework to figure out the weed’s habits! I only wish I could loan Darwin to you for awhile, Kevin. He would absolutely love to chow down on that lovely greenery. I pull spurge and other very “meaty” weeds and feed them to him so at least there’s that as an upside to the otherwise pesky problem of weeds. Dollarweed is an invasive irritant, I understand, but at last it’s kind of pretty!
Hi Debra — so, I need a turtle for my yard. If a turtle can also keep iguanas away, then I’m sold!
I too am a transplant to the south from the NYC area. In coastal Georgia I found it growing in my empty (plant-less) potting plants. I did not know what is was and thought it looked pretty so I let it grow. It’s funny how we humans, decide that a growing plant is a weed and is undesirable and we choose to launch a poison campaign against it’s existence. As the author points out Dandelions are a good example. They are actually quite beautiful and both the flowers and leafs are edible and it makes a great wine. It will however take over your lawn. So, should you desire the perfect suburban lawn it is a nuisance but it can be part an attractive flowering field. Likewise, Dollarweed can often grow where most things cannot and serve as perfect groundcover in the sandy coastal soil under my live-oaks. In addition to being very attractive (like small waterlily) they are also edible and delicious. “These “annoying” plants are quite close to celery in terms of taste, and can be served as a raw delicacy if SHTF [survival, hunting, trapping, fishing]. The leaves can be eaten raw or cooked. Dollar weed is a close cousin of Gotu Kola, which is widely known for its use in traditional Asian cooking and medicine. If you consume dollar weed, make sure you wash it thoroughly to avoid the risk of ingesting herbicides which are widely used to control this plant in lawns and gardens.”
Thanks for commenting, James… In the words of Ralph Waldo Emerson: “What is a weed? A plant whose virtues have never been discovered.”
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:
Avoid excess moisture. Pennywort thrives in wet areas. Improved drainage may help to prevent infestation of pennywort.
Use a postemergent broadleaf herbicide appropriately labeled for the turfgrass species.
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.
For optimum control, make your herbicide application when pennywort (dollarweed) is actively growing and in the one leaf to flower stage of growth.
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.
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.