The creeping stems of dollar weed laugh at most grocery-store sprays. You need a formula that attacks the waxy leaf cuticle and penetrates the root system, or you will be re-spraying the same patch in two weeks. The gap between a product that merely sings the leaves and one that eradicates the rhizomes is where most buyers waste their money.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I study herbicide chemistry labels, compare active ingredient ratios, and analyze thousands of verified owner reports to separate the effective dollar-weed killers from the diluted disappointments.
Whether you are fighting a few scattered dime-sized leaves or a full invasion taking over your St. Augustine, this guide breaks down the five formulations that deliver real results. My goal is to help you confidently choose the right best dollar weed killer for your specific lawn type and infestation level without wasting a single spray.
How To Choose The Best Dollar Weed Killer
Dollar weed (Hydrocotyle umbellata) is not like other broadleaf weeds. Its thick, waxy, rounded leaves repel water-based sprays the same way a raincoat sheds water. If your herbicide lacks the right surfactant or adjuvant system, the liquid simply beads off and leaves the weed untouched. Choosing the right product means understanding three critical factors.
Active Ingredients That Beat the Wax
The most effective dollar weed killers rely on a combination of 2,4-D, dicamba, and MCPP — the three-way herbicide mix often called “Three-Way” or “Trimec.” This trio works synergistically: dicamba penetrates the waxy cuticle, MCPP attacks the growth nodes, and 2,4-D disrupts the root system. Products that list only one of these ingredients will struggle against established dollar weed patches.
Selective vs. Non-Selective: Lawn Safety Matters
If your dollar weed is growing inside your lawn — especially in Bermuda, Zoysia, or St. Augustine — you need a selective herbicide that kills the broadleaf weed without damaging the turf. Non-selective formulas (those containing glyphosate or pelargonic acid) kill everything they touch, making them suitable only for patios, driveways, or bare dirt areas. Always check the label for the words “safe for lawns” before spraying over grass.
Application Format: Ready-to-Spray vs. Concentrate
Ready-to-spray bottles with hose-end applicators offer convenience for large lawns up to 6,000 square feet — you simply attach the bottle to a garden hose and walk. Ready-to-use trigger sprayers work best for spot-treating small patches or garden beds. Concentrates require mixing and a dedicated sprayer but deliver the lowest cost per square foot for heavy infestations across large properties.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Scotts Turf Builder Plus 2 | Lawn Fertilizer + Weed Killer | Feeding the lawn while killing dollar weed | 32 oz covers 4,000–6,000 sq. ft. | Amazon |
| Ortho Nutsedge Killer | Selective Spot Spray | Tough nutsedge and dollar weed patches | 24 oz ready-to-use trigger spray | Amazon |
| Spectracide Weed & Grass Killer | Non-Selective Fast Killer | Driveways, patios, and walkways | 32 oz (pack of 2), kills in 3 hours | Amazon |
| Pulverize Brush & Vine Killer | Total Vegetation Killer | Large areas, brush, and English ivy | 128 oz ready-to-use, non-staining | Amazon |
| RM18 Fast-Acting Weed Killer | Fast-Acting Concentrate | Quick knockdown on tough weeds | 32 oz ready-to-use, rainfast quickly | Amazon |
In‑Depth Reviews
1. Scotts Liquid Turf Builder with Plus 2 Weed Control
The Scotts Turf Builder Plus 2 is the rare two-in-one that actually performs both jobs well. The 32-ounce bottle contains a three-way herbicide mix (2,4-D, dicamba, MCPP) alongside a quick-release nitrogen fertilizer. This combination means you kill the dollar weed while simultaneously greening up the surrounding grass — handy when the weed has already thinned out your turf. Owners report visible wilting of dollar weed within 48 hours, with full kill in about a week.
The hose-end applicator simplifies coverage enormously. One bottle covers up to 6,000 square feet on warm-season lawns (4,000 on cool-season), which is enough for the average suburban front and back yard combined. The fertilizer component helps the grass fill in the bare spots left behind as the weeds die, preventing new weeds from germinating in the open soil. This is especially valuable for St. Augustine lawns recovering from dollar weed infestations.
Where it falls short is speed on dollar weed specifically. Several reviewers noted that tough, well-established dollar weed patches required a second application after two weeks. The product also will not kill crabgrass, so if your lawn has mixed weed issues, you may need a separate crabgrass preventer. But for a single-bottle solution that feeds while fighting dollar weed, this is the strongest all-around performer.
What works
- Dual-action: kills weeds and fertilizes grass at the same time
- Generous coverage up to 6,000 sq. ft. per bottle
- Quickly kills dollar weed, clover, and dandelions
What doesn’t
- Tough dollar weed may need a second application
- Does not control crabgrass
- Cool-season lawns get lower coverage
2. Ortho Nutsedge Killer Ready-to-Use
Though the label emphasizes nutsedge, Ortho’s selective herbicide is equally effective on dollar weed — especially for spot-treating small patches that appear in flower beds or along driveway edges. The 24-ounce trigger spray bottle gives you precise control, letting you soak individual dollar weed leaves without overspray onto desirable plants. The active chemistry (sulfentrazone) works by disrupting photosynthesis in the weed, causing it to yellow and collapse over 5 to 10 days.
One of the strongest points in favor of this product is its lawn safety. Owners report spraying directly over Bermuda and Zoysia with no visible damage to the turf. The formula is rainfast within a few hours, meaning you do not have to worry about an afternoon shower washing away your effort. For dollar weed growing in tight spaces — between pavers, around landscape fabric, or near prized shrubs — this trigger spray is far more practical than a hose-end broadcast.
The trade-off is coverage. One 24-ounce bottle treats only a limited area, making it expensive for whole-lawn infestations. You will also need to be patient: the selective action is slower than non-selective killers, and some varieties of dollar weed may require a second application after two weeks. But for precision spot treatment that protects your lawn, the Ortho Nutsedge Killer delivers reliable results.
What works
- Precise trigger spray for spot treatment
- Safe on common lawn grasses when used as directed
- Effective on dollar weed and tough nutsedge
What doesn’t
- Small bottle covers only limited area
- Slow visible results compared to non-selective products
- Some weeds need a second spray
3. Spectracide Weed & Grass Killer (Pack of 2)
When you need dollar weed gone within 24 hours — and you are not worried about collateral damage to surrounding plants — the Spectracide Weed & Grass Killer is the fastest trigger you can pull. This non-selective formula combines diquat (a contact herbicide that shreds leaf tissue on contact) with glyphosate (a systemic that travels to the roots). The result: visible wilting in as little as three hours, and complete necrosis within two days.
The pack-of-two configuration gives you 64 total fluid ounces, which is economical for clearing patios, walkways, gravel driveways, and fence lines where dollar weed often thrives. The ready-to-use sprayer works straight out of the bottle — no mixing, no measuring, no sprayer cleanup. Owners consistently praise the speed, with many noting that a single application eliminates dollar weed clumps that had survived multiple rounds of weaker products.
The serious downside is selectivity — this product kills any green vegetation it touches. If you accidentally overspray onto lawn grass, that grass will die too. The label also warns against using it in flower beds or near desirable shrubs. For targeted dollar weed removal inside the lawn, you are better off with a selective formula. But for hardscape areas where total vegetation removal is the goal, this pack is hard to beat for speed and price.
What works
- Visible results in as little as 3 hours
- Kills roots, preventing regrowth
- Rainfast in 15 minutes
What doesn’t
- Non-selective: kills any plant it touches
- Small 32-oz bottles for the price
- Not safe for use on lawns or near desired plants
4. Pulverize Brush & Vine Ready to Use Weed Killer
The Pulverize Brush & Vine Killer is the heavy artillery in this lineup — a full gallon of ready-to-use herbicide designed to tackle not just dollar weed but also woody vines, English ivy, and bittersweet. The active ingredient, maleic hydrazide, works as a growth inhibitor that prevents cell division in the weed’s meristematic tissue. This makes it particularly effective on dollar weed that has established deep rhizomes in hard-to-reach spots like retaining walls and under shrubs.
The one-gallon volume is the clear advantage here. Most ready-to-use weed killers come in 24- or 32-ounce bottles, forcing you to buy multiple units for large areas. The Pulverize gallon covers serious ground — owners report spraying fence lines, overgrown garden beds, and large brush patches with a single bottle. The non-staining formula means you can spray it on concrete or brick without leaving ugly residue.
The reliability of the sprayer mechanism is a recurring complaint. Several owners reported that the included spray wand malfunctioned or leaked before the bottle was empty. The company responds quickly to replacement requests, but the initial quality control is inconsistent. Additionally, like any non-selective herbicide, this product will kill grass and flowers if overspray occurs. For large-scale vegetation clearing where dollar weed is just one of many targets, the Pulverize gallon delivers excellent value per ounce.
What works
- Large 128-ounce bottle covers extensive areas
- Non-staining formula safe on hardscapes
- Effective on woody vines and established dollar weed
What doesn’t
- Spray wand has inconsistent quality control
- Non-selective: kills all vegetation
- Some users needed reapplication for stubborn weeds
5. RM18 Fast-Acting Weed & Grass Killer Herbicide
The RM18 Fast-Acting formula earns its name by delivering visible damage to dollar weed within hours of application. This ready-to-use spray relies on a proprietary blend of contact and systemic active ingredients that burn through the waxy leaf surface quickly while still translocating to the root system. Owners consistently report that dollar weed patches begin yellowing by the evening of the same day, and full kill occurs within 48 to 72 hours.
One of the standout features of RM18 is its residual effect. Many users note that treated areas stay weed-free for three months or longer after a single application. This makes it an especially good option for long gravel driveways, fence lines, and patio edges where dollar weed returns season after season. The formula also performs well in cooler weather — it remains effective even when nighttime temperatures dip into the 50s, which is when many other herbicides lose potency.
The main drawback is the same selectivity issue that applies to most fast-acting killers: RM18 kills grass and ornamentals on contact. You cannot use this inside your lawn without creating dead spots. And the 32-ounce bottle goes quickly when spraying large areas. For targeted, long-lasting dollar weed control on hardscapes and non-turf areas, however, the RM18 is one of the most reliable options available.
What works
- Fast visible results within hours
- Long residual control up to 3 months
- Effective in cooler temperatures
What doesn’t
- Non-selective: kills grass and ornamentals
- Small 32-oz bottle for the price
- Not ideal for large lawn areas
Hardware & Specs Guide
Active Ingredient Chemistry
The success of any dollar weed killer hinges on the active ingredient mix. Three-way herbicides combining 2,4-D, dicamba, and MCPP are the gold standard for selective broadleaf control in lawns. Non-selective formulas typically use glyphosate (systemic root kill) or diquat (contact burn). Products like Spectracide and Pulverize use these non-selective chemistries for total vegetation removal.
Coverage and Concentration
Coverage varies dramatically between product formats. A 32-ounce hose-end bottle (like Scotts) can cover up to 6,000 square feet, while a 32-ounce ready-to-use trigger bottle (like RM18) covers only about 300–500 square feet. Concentrates give the lowest cost per square foot but require a separate sprayer. Always calculate the square footage of your target area before choosing a bottle size.
FAQ
Why does dollar weed keep coming back after I spray?
Can I use a selective dollar weed killer on my St. Augustine lawn?
How long should I wait before mowing after applying dollar weed killer?
What is the best time of year to treat dollar weed?
Final Thoughts: The Verdict
For most gardeners, the best dollar weed killer winner is the Scotts Liquid Turf Builder with Plus 2 Weed Control because it fertilizes the lawn while killing dollar weed, covering up to 6,000 square feet with a single bottle. If you need precise spot treatment inside a lawn, grab the Ortho Nutsedge Killer. And for non-selective knockdown on driveways and patios, nothing beats the Spectracide Weed & Grass Killer pack for speed.