Dollar weed is one of the most persistent and unsightly invaders in warm-season lawns, spreading rapidly through stolons and choking out desirable turf. Without a targeted herbicide, hand-pulling only makes the problem worse, as broken stems regenerate into new plants.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I’ve spent years studying chemical formulations, reading hundreds of owner reports, and comparing the real-world knockdown rates of dozens of post-emergent and pre-emergent herbicides to find what actually works on stubborn dollar weed and similar broadleaf intruders.
After analyzing coverage areas, active ingredient profiles, and multi-season user feedback from five leading products, I’ve built this guide to help you select the best dollar weed herbicide for your specific lawn type and infestation level.
How To Choose The Best Dollar Weed Herbicide
Dollar weed thrives in moist, shady areas and develops waxy leaves that repel many standard broadleaf sprays. A herbicide that works on dandelions or clover may not penetrate dollar weed’s leaf cuticle. Focus on three specific factors when evaluating products.
Active ingredient match
Products containing a trimec blend (2,4-D, MCPP, dicamba) offer broad, reliable post-emergent control across most turf types. Mesotrione-based herbicides provide pre- and post-emergent action but require careful rate management—over-application can temporarily bleach desirable grasses. Dollar weed treated with mesotrione shows white, bleached foliage within days before complete die-off.
Turf-grass tolerance list
Bermudagrass, centipede, St. Augustine, and zoysia all respond differently to the same chemistry. Trimec blends are safe on most warm-season grasses except St. Augustine during active growth. Mesotrione is labeled for Kentucky bluegrass, tall fescue, and centipede but can injure bentgrass and kikuyugrass. Always check the label before buying.
Application method and rainfast window
Ready-to-use hose-end bottles are convenient for spot spraying but often cost more per square foot. Concentrates give you control over mixing ratios and stretch farther per dollar. Pay attention to the rainfast window—some products require only 15 minutes before a rain, while others need two hours. Dollar weed’s waxy leaves demand a surfactant (non-ionic) to break surface tension and improve coverage.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Southern Ag 13503 | Concentrate | Lawn spot treatment | 32 oz treats 5,000 sq ft | Amazon |
| Ortho GroundClear Super Concentrate | Concentrate | Hardscape & path clearing | 32 oz treats 1,120 sq ft | Amazon |
| Ortho Max Nutsedge Killer RTU | Ready to Use | Sedge & grassy weeds | 24 oz, two-pack, no mixing | Amazon |
| Spectracide Weed & Grass Killer | Concentrate | Fast non-selective kill | 32 oz treats 1,350 sq ft | Amazon |
| Liquid Harvest Mesotrione | Concentrate | Pre & post emergent control | 8 oz, 46 weed species | Amazon |
In‑Depth Reviews
1. Southern Ag 13503 Lawn Weed Killer with Trimec
Southern Ag 13503 relies on a patented combination of three proven weed killers — 2,4-D, MCPP, and dicamba — making it a highly effective trimec-based solution for dollar weed, clover, spurge, and chickweed in warm-season lawns. Its liquid concentrate format works with both conventional tank sprayers and hose-end applicators, giving you flexibility in coverage method. Users report visible wilting within 48 to 72 hours after application.
The 32-ounce bottle covers up to 5,000 square feet when mixed at the standard rate, which is significantly more coverage per ounce than most competitors. Adding a non-ionic surfactant is recommended to improve adhesion on dollar weed’s waxy leaves, and reviewers who paired the two noted faster knockdown. The formula is labeled for nine turf types including bermudagrass, centipede, zoysia, and tall fescue.
Customer feedback highlights strong results on onion grass, dandelions, and clover, but multiple users note that regrowth can occur within a few weeks, especially on mature dollar weed stands. Repeated applications every 21 days are often necessary to fully exhaust the weed’s root system. The product has a mild odor compared to some non-selective herbicides.
What works
- Trimec blend provides broad spectrum control on dollar weed
- 5,000 sq ft coverage per bottle is excellent value
- Safe on 9 common turf types when used per label
What doesn’t
- Requires repeat applications every 3 weeks for tough weeds
- Surfactant purchase adds an extra step and cost
- Container design can make measuring messy without a separate cup
2. Ortho GroundClear Weed and Grass Killer Super Concentrate
Ortho GroundClear Super Concentrate is a fast-acting non-selective herbicide built for clearing vegetation around patios, walkways, fences, and landscape beds. Its active ingredients — 2,4-D and dicamba — penetrate root systems to kill weeds down to the taproot, and the formula is rainfast in just 15 minutes, making it a reliable choice for unpredictable weather.
The 32-ounce bottle treats up to 1,120 square feet when mixed at the highest rate, though users report stretching it further by adjusting the dilution ratio. It is designed for tank sprayer application and works best when temperatures stay above 60°F. Dollar weed, crabgrass, clover, dandelion, and oxalis are all listed on the label. Many reviewers note seeing full kill within 24 to 48 hours on broadleaf weeds.
One important caveat: this is a non-selective formula, meaning it will damage or kill any desirable grass it contacts. Use it for targeted spot treatment on dollar weed growing in cracks, patios, or areas where lawn grass is not present. The concentrate format makes it economical for larger hardscape areas, and the fast rainfast window gives you application flexibility.
What works
- Visible results in 24 to 48 hours on dollar weed
- Rainfast in 15 minutes — excellent for unpredictable weather
- Concentrate format delivers great coverage per dollar
What doesn’t
- Non-selective — cannot use on lawn turf
- Volatile above 80°F, risk of drift damage to nearby plants
- Price per bottle fluctuates frequently
3. Ortho Max Nutsedge Killer RTU, 24 fl.oz. (2 Pack)
Ortho Max Nutsedge Killer is a ready-to-use formula that targets yellow and purple nutsedge, kyllinga, wild onion, garlic, and over 50 other listed weeds including broadleaf plantain and dandelion. No mixing or measuring is required — simply attach the hose-end sprayer and apply directly to dollar weed and sedge-infested areas. The two-pack gives you 48 total fluid ounces of product.
This product is designed to kill weeds without harming Northern and Southern turf grasses, making it a safer option for spot treatment in established lawns. The active chemistry works by being absorbed through the leaf surface, then translocating to the root system to prevent regrowth from underground tubers — which is critical for dollar weed control since stem fragments left by pulling regenerate quickly. Reviewers report seeing die-off within 5 to 7 days.
While effective on nutsedge, several reviewers note that dollar weed may require two or three applications spaced 10 to 14 days apart for complete eradication. The RTU format is convenient but limits your ability to adjust concentration for heavier infestations. The 2-hour rainfast window is adequate but less flexible than some concentrates.
What works
- No mixing or measuring — ready to spray out of the box
- Safe on both Northern and Southern lawn turf types
- Two-pack provides a generous 48 fl oz total
What doesn’t
- Multiple applications needed for dollar weed stands
- 2-hour rainfast window is slower than competitors
- Cannot adjust concentration for tough infestations
4. Spectracide Weed and Grass Killer Concentrate, 32 oz
Spectracide Weed and Grass Killer uses diquat dibromide as its active ingredient, a contact herbicide that produces visible results as fast as three hours after application. This speed makes it a top choice for homeowners who want immediate visual confirmation that a treatment is working. The 32-ounce concentrate treats up to 1,350 square feet and is rainfast in just 15 minutes.
The included Accumeasure cap is designed to simplify measuring, though several experienced users found it less precise than a standard measuring cup and simply replaced it with the old-style lid. The formula is non-selective, so it will kill any vegetation it contacts — ideal for dollar weed on driveways, walkways, fence lines, and flower bed borders where you want bare ground. It does not translocate to roots as deeply as systemic herbicides, so regrowth from established dollar weed stolons is possible.
Users report that adding a slightly higher concentration than the label suggests can improve knockdown on tough waxy-leaved weeds like dollar weed, but this also increases the risk of turf injury if accidentally over-applied. The product is best used for spot treatments on hardscape areas rather than broadcast lawn spraying. Safety gear (gloves, long sleeves, eye protection) is recommended during mixing.
What works
- Visible weed kill in as fast as 3 hours
- Rainfast in 15 minutes for flexible application timing
- Accumeasure cap reduces mixing mess
What doesn’t
- Non-selective — kills any grass it contacts
- Contact mode of action may miss deep root systems
- Accumeasure system criticized by experienced users
5. Liquid Harvest Mesotrione 8 oz Concentrate
Liquid Harvest Mesotrione is a highly concentrated selective herbicide that works both pre-emergently and post-emergently on 46 broadleaf and grass weed species including dollar weed, clover, crabgrass, and barnyardgrass. The 8-ounce bottle packs significant chemical muscle — users typically mix just 1 teaspoon per 2 gallons of water for post-emergent applications, making this one of the longest-lasting concentrates available per ounce.
Mesotrione works by inhibiting photosynthesis, causing a characteristic whitening or bleaching of the weed foliage before die-off occurs over 10 to 14 days. It is labeled for cool-season grasses like tall fescue, Kentucky bluegrass, perennial ryegrass, and fine fescue, as well as warm-season centipede grass and St. Augustine (sod only). It is not safe on bentgrass, zoysiagrass, or bermudagrass during active growth. Activation requires 0.15 inches of rainfall or irrigation within 24 hours of application.
Users praise its effectiveness on stubborn dollar weed and crabgrass, but caution that over-application will bleach and damage desirable turf. Using a battery-powered backpack sprayer with a dye indicator is recommended to prevent overlap. The product is seed-safe, meaning it can be applied near new seedings without preventing germination, which is a rare advantage among post-emergent herbicides.
What works
- Pre- and post-emergent action for season-long dollar weed control
- Extremely concentrated — small bottle goes a very long way
- Seed-safe, can be used near new turf seedlings
What doesn’t
- Can temporarily bleach desirable turf if over-applied
- Requires 0.15 inches of water within 24 hours for activation
- Not safe on zoysia, bermudagrass, or bentgrass
Hardware & Specs Guide
Active Ingredient Chemistry
The type of active ingredient determines how a dollar weed herbicide kills and what turf it can safely touch. Trimec blends (2,4-D + MCPP + dicamba) are systemic broadleaf specialists that translocate to roots. Diquat dibromide is a fast-contact killer with no root translocation. Mesotrione inhibits photosynthesis and offers both pre- and post-emergent action. Select chemistry based on your weed pressure and turf species.
Concentrate vs Ready-to-Use
Concentrates require mixing with water in a tank sprayer but deliver far more coverage per dollar and let you adjust strength for tough dollar weed stands. Ready-to-use (RTU) formulas come pre-mixed in a hose-end bottle and offer convenience at a higher cost per square foot. For large infestations, a concentrate with a backpack or pump sprayer is the most efficient and economical route.
Rainfast Window
The rainfast window is the time after application before rainfall or irrigation will wash off the herbicide. Products range from 15 minutes (Ortho GroundClear, Spectracide) to 2 hours (Ortho Nutsedge Killer). A shorter window gives you more schedule flexibility, especially during humid, unpredictable months when dollar weed thrives. Always check the label before spraying if rain is forecast.
Coverage Area
Coverage per bottle varies dramatically: Southern Ag 13503 treats 5,000 sq ft at standard rates, while Ortho GroundClear only covers 1,120 sq ft at max rate. The Liquid Harvest Mesotrione 8 oz bottle, mixed at 1 tsp per 2 gallons, can treat over 10,000 sq ft. For large lawns with persistent dollar weed, prioritize high-coverage concentrates to minimize reordering.
FAQ
What is the best time of year to apply a dollar weed herbicide?
Can I use a trimec-based herbicide on my St. Augustine lawn?
Why does dollar weed come back after I spray?
Final Thoughts: The Verdict
For most gardeners, the best dollar weed herbicide winner is the Southern Ag 13503 with Trimec because its three-ingredient blend provides broad-spectrum control across nine turf types and offers the best coverage per ounce. If you need a non-selective option for hardscapes and fast visual results, grab the Spectracide Weed and Grass Killer. And for pre- and post-emergent protection that is seed-safe, nothing beats the Liquid Harvest Mesotrione.