Spurge is one of the most aggressive broadleaf weeds—its thick, mat-forming habit and milky sap make it a bully in flower beds and turf grass alike. Nuking it without damaging your lawn or ornamentals demands a selective formula that targets the root system on contact.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I spend my days dissecting label data, cross-referencing active ingredient concentrations, and studying aggregated owner feedback to find what actually works against tough broadleaf species like spurge, oxalis, and creeping charlie.
Whether you are fighting prostrate spurge or spotted spurge in a fescue, bluegrass, or Bermuda lawn, the right herbicide for spurge must combine a proven root-killing agent like dicamba or triclopyr with a formula that stays rainfast and won’t scorch your turf.
How To Choose The Best Herbicide For Spurge
Spurge is a warm-season annual that germinates fast and spreads flat against the soil. A successful treatment requires the right chemistry, application method, and timing. Here is what matters most when selecting a product.
Active Ingredient Profile
The most effective spurge-specific herbicides rely on dicamba, triclopyr, or quinclorac as the primary active ingredient. Dicamba and triclopyr are systemic auxin mimics that force the weed to grow itself to death from the roots up. Avoid relying on 2,4-D alone—spurge often shrugs it off.
Selectivity and Lawn Safety
Choose a formula labeled for your specific turf type. Fescue, Kentucky bluegrass, Bermuda, and Zoysia each have different tolerances to herbicide chemistry. A non-selective killer like glyphosate will kill spurge but also everything green around it—only reach for it in bare-soil areas.
Formulation and Coverage
Ready-to-use spray bottles offer convenience for spot treatment, while concentrate formulas deliver better economy for large lawns. Check the coverage per container: a gallon of ready-to-use might cover 10,000 square feet, whereas a small concentrate bottle can require a tank sprayer but treat a much larger area.
Rainfastness and Speed of Results
Look for a rainfast window of 15 minutes to 2 hours. Products that resist wash-off after a brief dry time give you flexibility during unpredictable weather. Visible wilting within hours signals a fast-translocating chemistry, though full root death may take a week.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| ferti-lome Weed Free Zone | Premium | Spurge control on established turf | Dicamba-based concentrate | Amazon |
| ferti-lome Weed-Out with Crabgrass Killer RTS | Premium | Broadleaf + grassy weed combo | Dicamba + Quinclorac RTS | Amazon |
| Ortho WeedClear Lawn Weed Killer Comfort Wand | Mid-Range | Easy spot treatment for lawns | 20,480 sq ft coverage | Amazon |
| Bonide Chickweed, Clover & Oxalis Killer | Mid-Range | Selective control without killing grass | Dicamba + Triclopyr | Amazon |
| Spectracide Weed and Grass Killer Concentrate | Budget | Non-selective hardscape use | Diquat Dibromide concentrate | Amazon |
In‑Depth Reviews
1. Fertilome Weed Free Zone (32 oz)
The Fertilome Weed Free Zone is built specifically for tough broadleaf weeds including spurge, thistle, and chickweed. With dicamba as the primary active ingredient, this concentrate delivers systemic translocation that attacks the entire root system—critical for spurge’s sprawling growth habit.
Owner feedback consistently mentions visible injury within hours of application and complete weed collapse within a week, even on mature prostrate spurge mats. The formula is labeled safe on Kentucky bluegrass, Bermudagrass, Bahiagrass, and Zoysiagrass when used at the recommended dilution rate.
Being a concentrate, it requires a tank sprayer for mixing, which gives you flexibility to treat large areas without buying multiple ready-to-use jugs. This is the go-to option for homeowners who want professional-grade chemistry without a commercial applicator license.
What works
- Fast systemic action visible within hours
- Safe on multiple common turf grasses
- Concentrate format offers excellent value per square foot
What doesn’t
- Requires a separate tank sprayer for application
- Must be mixed precisely to avoid turf damage
2. Fertilome Weed-Out with Crabgrass Killer RTS (32 oz)
This ready-to-spray formula combines dicamba with quinclorac—giving you a one-two punch against both broadleaf weeds like spurge and grassy weeds like crabgrass and foxtail. The 32 oz bottle treats up to 2,500 square feet when connected to a garden hose.
The quinclorac component is what sets this apart: spurge often grows alongside crabgrass in thin turf, and this product handles both without requiring multiple passes. The ready-to-spray mechanism auto-mixes as you water, eliminating measuring errors.
Label instructions recommend application in spring or early summer when weeds are small and actively growing. Users report excellent results on young spurge, but mature, thick mats may need a second application after two weeks.
What works
- Controls both broadleaf and grassy weeds in one pass
- Hose-end sprayer eliminates mixing guesswork
- Safe on Bermuda, Buffalo, and Kentucky Bluegrass
What doesn’t
- Coverage limited to 2,500 sq ft per bottle
- Less effective on mature, woody spurge stems
3. Ortho WeedClear Lawn Weed Killer Ready-to-Use with Comfort Wand (1 gal)
The Ortho WeedClear with the battery-powered Comfort Wand takes the physical labor out of spot treatment. The wand delivers a targeted stream directly onto spurge leaves, reducing overspray onto desirable grass. One gallon covers an impressive 20,480 square feet of lawn area.
The formula is designed to be fast-acting and effective against crabgrass, dandelion, clover, and creeping charlie—broadleaf weeds that share similar growth habits with spurge. Owners appreciate that it won’t harm lawn grasses like fescue, ryegrass, and Zoysiagrass when used as directed.
Because it’s a ready-to-use formula, there is zero mixing or measuring. You simply squeeze the trigger and spray. The trade-off is that the active ingredient profile may be less potent on deeply rooted spurge compared to premium concentrate options.
What works
- Comfort Wand enables precise, ergonomic application
- Massive 20,480 sq ft coverage per gallon
- Ready-to-use convenience with no mixing
What doesn’t
- May require multiple applications for tough spurge
- Wand batteries need periodic replacement
4. Bonide Chickweed, Clover & Oxalis Killer (128 oz)
Bonide’s weed killer pairs dicamba with triclopyr—two active ingredients with complementary modes of action that are particularly effective against oxalis, clover, and spurge relatives. The 128 oz ready-to-use bottle covers up to 10,000 square feet with no mixing required.
The triclopyr component gives this formula an edge on spurge varieties that have developed partial resistance to straight 2,4-D. Users report excellent results on established spurge in fescue and bluegrass lawns, with minimal yellowing of the surrounding turf.
Being a larger ready-to-use format, the Bonide is a solid mid-range pick for homeowners who want to cover a decent area without moving to a concentrate. The lack of a wand means you’ll need either a sprayer attachment or a pump sprayer, which is a small extra step.
What works
- Dual active ingredients enhance weed resistance management
- Large 128 oz bottle covers 10,000 sq ft
- Very gentle on lawn grasses
What doesn’t
- Does not include an integrated spray wand
- Slower visible results compared to concentrated formulas
5. Spectracide Weed and Grass Killer Concentrate (32 oz)
The Spectracide Weed and Grass Killer uses diquat dibromide, a contact herbicide that provides visible results within 3 hours. It’s non-selective, meaning it kills everything it touches—perfect for driveways, walkways, fence lines, and other areas where no vegetation is desired.
The Accumeasure cap makes measuring the concentrate simple and mess-free. Mix it with water in a tank sprayer and spray to completely cover the target leaves. It becomes rainfast in just 15 minutes, so a passing shower won’t ruin your work.
This is not a lawn-friendly option—it will scorch turf grass just as readily as spurge. Use it for spot treatment in landscape beds, gravel paths, and cracks in pavement where spurge emerges between pavers.
What works
- Lightning-fast results visible in hours
- Rainfast in 15 minutes—very weather-tolerant
- Accumeasure cap simplifies mixing
What doesn’t
- Non-selective—kills all vegetation it touches
- Contact killer only, less root translocation
Hardware & Specs Guide
Dicamba
An auxin-disrupting herbicide that mimics natural plant hormones, causing uncontrolled cell growth that kills broadleaf weeds from the inside. Dicamba is the backbone of most premium spurge-specific formulas due to its excellent root translocation and residual soil activity.
Triclopyr
A systemic herbicide absorbed through leaves and roots. Triclopyr is especially effective against woody and waxy-leafed weeds, making it a strong complement to dicamba for tough spurge varieties. It degrades quickly in soil, reducing risk to nearby ornamentals.
Quinclorac
Originally developed for crabgrass control, quinclorac also works on certain broadleaf weeds. It inhibits cellulose synthesis in target plants. When combined with dicamba, it provides broader coverage for mixed weed infestations that include spurge and grass weeds.
Diquat Dibromide
A fast-acting contact herbicide that disrupts photosynthesis, causing rapid desiccation. Diquat is non-selective and has no residual soil activity—ideal for hardscape weed control but unsuitable for lawn applications where selective killing is required.
Concentrate vs. Ready-to-Use
Concentrates require mixing with water and a tank sprayer but deliver more total volume per dollar. Ready-to-use formulas (RTU and RTS) offer convenience for spot treatment with zero measurement—but the convenience comes at a higher cost per square foot.
Rainfast Window
The time a herbicide needs to dry on leaf surfaces before rain or irrigation can wash it off. Formulations with a 15-minute window (like diquat-based) are very weather-resilient, while systemic formulas often need 1-2 hours. Always check the label before applying if rain is forecast.
FAQ
Can I use a general weed killer on spurge or does it need a special formula?
Will herbicide for spurge also kill my grass?
How long does it take for spurge to die after spraying?
What time of year is best to spray for spurge?
Can I pull spurge by hand instead of using herbicide?
Final Thoughts: The Verdict
For most gardeners, the herbicide for spurge winner is the ferti-lome Weed Free Zone because its dicamba-base delivers the systemic root kill that spurge requires, and the concentrate format provides excellent coverage per dollar. If you want a ready-to-spray option that also handles crabgrass, grab the ferti-lome Weed-Out with Crabgrass Killer. And for fast-acting non-selective control on hardscapes, nothing beats the Spectracide Weed and Grass Killer Concentrate.