Dollar weed is one of the clearest signs that a Florida lawn is holding too much moisture. If you are wondering how to get rid of dollar weed lawn growth for good, spraying the visible leaves is only part of the answer. The long-term fix involves treating the weed, correcting the conditions it likes, and helping your turf become thick enough to compete.
Also called pennywort, dollar weed has round, shiny leaves that resemble small coins. It spreads through seeds and creeping stems, so a few scattered leaves can become a noticeable patch after a wet Tampa Bay summer. It is common in St. Augustinegrass, bermudagrass, zoysiagrass, and centipede lawns throughout Clearwater, St. Petersburg, Bradenton, Sarasota, and surrounding Gulf Coast communities.
Why Dollar Weed Keeps Coming Back
Dollar weed thrives in damp, poorly drained areas. It often appears where irrigation runs too long, rainwater collects, downspouts empty into the lawn, or heavy soil stays wet after a storm. Florida’s humidity and frequent summer rain give it plenty of opportunities to spread.
That does not mean every lawn with dollar weed is overwatered. A low spot, compacted soil, a leaking irrigation head, shade, or poor drainage near a patio can create a wet pocket even when the rest of the yard is managed well. The location of the weed tells you a great deal about the underlying problem.
Dollar weed also takes advantage of thin turf. When grass is stressed by insects, disease, improper mowing, too much shade, or nutrient issues, sunlight reaches the soil and gives weeds room to establish. That is why a one-time weed treatment can look successful at first, then fail when the lawn remains thin or soggy.
How to Get Rid of Dollar Weed in a Florida Lawn
The best approach combines moisture management with a selective weed treatment that is labeled for your grass type. Start by checking whether the problem is concentrated around irrigation heads, gutters, low areas, or shady spots. Those areas should be addressed before expecting lasting weed control.
Adjust Irrigation Before Treating
A healthy established Florida lawn generally benefits from deep, less frequent watering rather than short daily cycles. Frequent light watering keeps the soil surface damp, which is exactly what dollar weed prefers.
Turn off or reduce irrigation after meaningful rainfall, and check your controller seasonally. A schedule that worked during a dry spring may be excessive during the summer rainy season. If a particular zone stays wet while nearby grass dries normally, inspect for a broken head, poor coverage pattern, or a valve issue.
In low-lying areas, drainage may need more than an irrigation adjustment. Regrading, redirecting a downspout, improving runoff, or addressing compacted soil can make a significant difference. These are not always quick fixes, but they prevent dollar weed from returning to the same place year after year.
Use the Right Selective Herbicide
Dollar weed can be controlled with post-emergent herbicides, but the product must be approved for the specific turfgrass in your yard. This matters in Florida because St. Augustinegrass, one of the region’s most common lawns, can be injured by products that may be appropriate for bermudagrass or zoysiagrass.
Some products are formulated specifically for dollar weed control in certain warm-season grasses. Others rely on active ingredients such as atrazine, bentazon, sulfentrazone, or three-way broadleaf herbicide blends. Each has different turf tolerances, temperature restrictions, application timing, and repeat-treatment instructions.
Read the entire label before applying anything. Do not assume a weed killer is safe because it is sold for lawns. The label should specifically list both dollar weed and your grass type. Follow the labeled mixing rate, avoid spraying stressed turf during extreme heat, and keep children and pets off the treated area until the product has dried or the label says it is safe to reenter.
Expect established dollar weed to require more than one application in some cases. Mature patches and rainy weather can make control slower. Applying more product than directed will not make the treatment work better, and it can damage the lawn you are trying to protect.
Treat at the Right Time
Treat dollar weed while it is actively growing and before it has spread across a large area. In the Tampa Bay and Gulf Coast region, this often means addressing it in spring, summer, or early fall when the weed is actively producing new growth. Rain can complicate timing, so apply only when the product label allows enough dry time for the treatment to remain on the leaf surface.
Avoid mowing immediately before or after application if the label advises against it. You want enough leaf area present for the herbicide to be absorbed. A professional lawn technician can also identify whether the lawn is dealing with a look-alike weed, since several Florida weeds have round leaves but require different treatment plans.
Help Your Grass Crowd Out Dollar Weed
Weed control works best when the lawn is healthy enough to fill in after treatment. Mow at the proper height for your grass type and never remove more than one-third of the grass blade in a single mowing. Scalping weakens turf, exposes soil, and creates the open space dollar weed needs.
Proper fertilization is equally important, but more fertilizer is not automatically better. Florida lawns need nutrients based on grass type, soil conditions, season, local regulations, and the lawn’s current health. Overfertilizing can create fast, weak growth and contribute to runoff, while underfeeding leaves turf thin and vulnerable.
Watch for other stresses that can prevent recovery. Chinch bugs, sod webworms, armyworms, fungal disease, and shade can all leave bare or thinning areas behind. If dollar weed is appearing in a lawn that is yellowing, wilting, or thinning, the weed may be a symptom rather than the main problem.
What Not to Do With Dollar Weed
Hand-pulling can help with a few isolated plants, especially after rain when roots release more easily. But it is rarely a full solution for a widespread infestation because creeping stems and root pieces may remain in the soil. Pulling without correcting wet conditions usually leads to new growth.
Do not rely on pre-emergent weed control alone. Pre-emergent products are useful for preventing certain annual weeds, but dollar weed is a perennial weed that often spreads through established plant material. It typically needs a targeted post-emergent treatment along with moisture control.
Avoid broad, repeated spraying without diagnosing the turf first. A lawn that receives the wrong herbicide, an excessive rate, or a treatment during heat stress can develop more bare areas. That gives dollar weed and other weeds even more opportunity to move in.
When Professional Lawn Care Makes Sense
If dollar weed is scattered across the property, returns after treatment, or grows alongside thinning grass, a professional evaluation can save time and prevent turf damage. The right plan should look beyond the weed itself and assess irrigation, drainage, grass health, insects, disease pressure, and the herbicide options appropriate for your lawn.
Forever Green Lawn & Pest provides Florida-specific lawn care programs designed around the conditions homeowners face in this region. With recurring care, the goal is not simply to knock back dollar weed for a few weeks. It is to build a healthier lawn that can stand up to rain, heat, pests, and seasonal weed pressure.
A dollar weed problem is often your lawn’s way of pointing to excess moisture or thinning turf. Address that message early, and you can turn a recurring weed patch into a stronger, more attractive lawn that is easier to maintain through every Florida season.
