Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Dollarweed laughs at most weed killers because it thrives in the same wet, sunny spots your grass loves. The real battle is finding a herbicide that kills the penny-shaped invader without scorching St. Augustine, Bermuda, or centipede lawns. This guide breaks down three proven formulations built for warm-season turf, so you can spot the right one for your yard before you mix a single batch.
I’m Rikta — the founder and writer behind Lawn Gear Lab. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
You need a selective post-emergent that targets dollarweed while leaving your lawn intact, and this herbicide for dollarweed rundown compares the top contenders for warm-season grasses.
Our Picks at a Glance
How To Choose The Best Herbicide For Dollarweed
Dollarweed signals a lawn that stays too wet, so the first fix is drainage. But even after you dry things out, the established plants need a targeted chemical to finish the job. The right pick depends on your grass type, your patience, and how you like to spray.
Match the Chemistry to Your Turf
Warm-season grasses like St. Augustine and centipede are sensitive to many broadleaf killers. You need a selective formula that targets dollarweed, Virginia buttonweed, and doveweed while leaving your turf unharmed. Check the label for your grass species before buying, because a product that works on Bermuda can badly damage St. Augustine.
Understand the Formulation
Some dollarweed killers come as wettable granules you mix into water, while others are ready-to-use liquids. Granules usually offer more concentrated coverage per ounce and store easily, but they demand precise measuring. Liquids are simpler to pour but often need a surfactant (a soap-like additive that helps the spray stick to waxy leaves) for best results.
Plan for Temperature and Timing
Heat stress is a real risk when spraying weeds in summer. Look for products that perform well in high temperatures, since some herbicides yellow your lawn when the mercury climbs. Dollarweed responds best to post-emergent treatment during active growth, so plan to spray when the weed is growing, not during drought dormancy.
Quick Comparison
| Model | Best For | Formulation | Active Ingredient | Unit Size | Amazon |
|---|---|---|---|---|---|
| Bayer Celsius WG★ Best Overall | Heat-proof all-in-one control | Wettable granule | Thiencarbazone-methyl, odosulfuron-methyl-sodium, Dicamba | 10 oz | Amazon |
| Blindside Herbicide WDG | Fast visible control on St. Augustine | Dispersible granule | Sulfentrazone | 8 oz | Amazon |
| Liquid Harvest Quinclorac | Broadleaf and grassy weed combo | Liquid | 18.92% Quinclorac | 8 fl oz | Amazon |
In-Depth Reviews
1. Bayer Celsius WG 10 oz
Our pick — over 4.5★ from 450+ verified ratings; the strongest balance of quality and price.
The heat-proof granule that erases dollarweed without yellowing your warm-season lawn
This is the heavy hitter for southern lawns, and it earns its reputation the hard way. The 10 oz wettable granule (a powder you mix with water) combines three active ingredients — Thiencarbazone-methyl, odosulfuron-methyl-sodium, and Dicamba — to take down dollarweed alongside Virginia buttonweed, chamberbitter, doveweed, and large crabgrass. Buyers report it “Kills Virginia buttonweed in St. Augustine without yellowing, even in 94°F heat,” which makes it a rare summer-safe option when other products force you to wait for cooler weather.
It’s built for warm-season turf like centipede, Bermuda, and St. Augustine, and it also kills bahia grass and carpetgrass that invade those lawns. The trade-off is precision: this is not a hose-end sprayer product, so you need a backpack or pump sprayer with constant agitation to keep the granules suspended. A single 10 oz bottle stretches a long way at the label rate of 1.6 to 3.2g per 1,000 sq ft, so the upfront cost softens into roughly two seasons of spot treatments for many owners.
The catch is that you must know your grass type and your weeds, because this formula won’t kill everything. Some owners found it slow on Dallasgrass and crabgrass, noting that patience — up to three weeks — is part of the deal. The crowd favorite here holds a 4.6-star score across 400+ owners, and the recurring advice is simple: follow the label, watch a tutorial, and let it work.
What wins people over
- Works in extreme heat without stressing St. Augustine
- Three active ingredients cover a wide weed spectrum
- Concentrated formula lasts multiple seasons for spot sprayers
Know before you buy
- Requires a backpack sprayer with agitation, not a hose end
- You must identify your grass and weeds to dose correctly
- Slow on some tough grasses like Dallasgrass
Reach for this if: you run a warm-season lawn in a hot climate and want one selective product that handles dollarweed plus a wide range of stubborn weeds.
Look elsewhere if: you want a simple hose-end application or you aren’t willing to learn your grass and weed types first.
2. Blindside Herbicide WDG 8 oz
A dual-action granule that shows visible weed control within a week
If your yard is St. Augustine and you’ve been burned by “safe” products that still damaged the turf, this is the formula to trust. Blindside is built around Sulfentrazone and works through both foliar (leaf) and root uptake, which means it hits dollarweed from two directions for faster results. The maker claims visible signs of control in about a week, and owners confirm it: “Kills my tough weeds and crab grass without harming the St. Augustine.”
It’s approved for virtually all warm-season grasses, including St. Augustinegrass, plus Kentucky Bluegrass and Tall Fescue for transition-zone flexibility. The 8 oz dispersible granule comes in a tip-and-measure package with a dosing chamber, so you can accurately treat 1,000 sq ft at low or high rates without a scale. Each half-pound package covers over 50,000 sq ft, which is massive value for anyone with a bigger property.
The honest limits are worth noting: it won’t touch Dallis grass, and it’s not an overnight fix — owners stress patience as the weeds brown over a week or more. Mixing requires a little research and a hand pump, and some call the chemical pricey, though the results on tough broadleaf weeds keep people coming back for a sixth bottle.
Speed and selectivity: Visible results in about a week, and it’s proven safe on St. Augustine, which is the pickiest warm-season grass.
One gap to know: Dallis grass survives this treatment, so pair it with something else if that weed is in your yard.
Best for: St. Augustine owners who want fast, visible dollarweed control without turf damage and who don’t mind hand-mixing.
Think twice if: you’re battling Dallis grass or you want a grab-and-go spray bottle rather than a mix-it-yourself granule.
3. Liquid Harvest Quinclorac 8 oz
The budget liquid that hits dollarweed and crabgrass without emptying your wallet
This is the affordable entry point that still delivers professional-grade chemistry. The 8 fl oz liquid concentrates a hefty 18.92% Quinclorac, and the label lists dollarweed (pennywort) among the broadleaf weeds it controls, alongside clover, dandelion, and ground ivy. It also takes on grassy weeds like crabgrass, foxtail, and barnyardgrass, making it a rare two-in-one for yards with mixed weed problems. Owners mention “Effective crabgrass killer; yellowing by day 3, dead by day 5” when mixed at 1.5 oz per gallon per 1,000 sq ft.
The value story is strong, but the experience is mixed. Owners who follow the label exactly — adding a surfactant (a soap-like additive that helps spray stick to waxy leaves) and spraying a fine mist — see discoloration within a day and dead weeds within four. Those who skip the surfactant or rush the application find it underwhelming, and some established, widespread crabgrass in Bermuda needs multiple reapplications to finish the job.
It’s a smart pick if you’re willing to experiment with mixing ratios and timing, and it’s gentler on fescue and bluegrass than many grass-safe sprays. Just don’t expect it to be a one-and-done solution for a badly neglected lawn, and note that a few owners find the price high for the 8 oz bottle despite the concentration.
Why it earns a spot
- Dual action on broadleaf dollarweed and grassy crabgrass
- Visible results in days when mixed with a surfactant
- Safer on fescue and bluegrass than many alternatives
The trade-offs
- Effectiveness drops fast if you skip the surfactant
- Established weeds may need multiple applications
- Some owners feel the 8 oz bottle is pricey
Grab it if: you want the most affordable way to tackle both dollarweed and crabgrass and you’re comfortable fine-tuning your mix.
Pass if: you want a low-maintenance spray with zero mixing research involved.
Understanding the Specs
Active Ingredients
The chemical cocktail inside the bottle determines what dies and what survives. Bayer Celsius combines Dicamba with two sulfonylurea herbicides for wide-spectrum control, while Blindside relies on Sulfentrazone for dual foliar and root uptake. Quinclorac, the active in the Liquid Harvest pick, is famous for crabgrass but also lists dollarweed on its label.
Wettable Granule vs Liquid
Granules like Celsius and Blindside are powders you mix into water, offering concentrated coverage per ounce but requiring precise measuring and constant agitation in your sprayer. Liquids like the Quinclorac option pour and mix more easily, but they typically need a surfactant added to help the spray coat waxy dollarweed leaves effectively.
Coverage and Concentration
Blindside’s dosing chamber accurately treats 1,000 sq ft at low or high rates, and each half-pound package covers over 50,000 sq ft. Bayer Celsius works at a lean 1.6 to 3.2g per 1,000 sq ft, so a 10 oz bottle lasts a long time for spot sprayers. The Quinclorac liquid concentrates 18.92% active ingredient in just 8 fl oz.
Temperature Tolerance
Heat stress is the silent killer of summer weed control. Bayer Celsius specifically earns praise for working in 94°F heat without yellowing St. Augustine, while Blindside can be applied in warmer temperatures without adding turf stress. Check the label for temperature limits, because many cheaper products force you to wait for cooler weather.
FAQ
Will these herbicides kill dollarweed in St. Augustine grass?
What is the difference between Celsius and Blindside for dollarweed?
Does Quinclorac kill dollarweed or just crabgrass?
Can I use a hose-end sprayer with these dollarweed killers?
How long does it take to see dollarweed die after spraying?
Will these products harm Bermuda or centipede grass?
Do I need to add a surfactant to these herbicides?
Why does dollarweed keep coming back after I spray?
Final Thoughts: The Verdict
For the majority of shoppers, the herbicide for dollarweed winner is the Bayer Celsius WG because it combines three active ingredients into one heat-proof granule that handles dollarweed plus a wide weed spectrum without stressing warm-season turf. If you want the fastest visible control on St. Augustine, grab the Blindside Herbicide WDG and enjoy results in about a week. And for an affordable one-two punch against both dollarweed and crabgrass, the Liquid Harvest Quinclorac is the one to reach for when you’re willing to fine-tune your mix.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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