Many homeowners searching for the best weed killer for oxalis quickly discover that oxalis is one of the most persistent broadleaf weeds to eliminate. Its underground bulbs and aggressive growth habit allow oxalis to return repeatedly unless an effective herbicide is used.
Selecting the right herbicide for oxalis involves more than choosing the strongest formula available. The active ingredients, selectivity, application timing, and residual control all play an important role in achieving long-lasting oxalis control.
Experts recommend using a herbicide specifically suited to the area where oxalis is growing, whether in lawns, flower beds, driveways, or sidewalks. Treating oxalis at the correct growth stage improves herbicide performance while reducing the risk of future infestations.
In this guide, we review the best weed killer for oxalis based on herbicidal effectiveness, active ingredients, coverage, ease of application, safety, and overall value against oxalis. Our expert recommendations will help you choose the most effective herbicide for reliable, long-term oxalis control.
Reviews: 7 Best Weed Killer For Oxalis 2026
1.Primesource Meso 4 SC Select- Best Oxalis Killer
Primesource Meso 4 SC Select, a non-selective herbicide for oxalis (yellow wood sorrel), is also a five star rated weed killer. It has Mesotrione 40.0%, which makes it a perfect strategy for controlling oxalis in Residential turf-grass, Cemeteries, Athletic Fields, driveway, and parking lot.
By being a safe pest post-emergence and pre-emergence oxalis killer, Primesource Meso also can eradicate other weeds such as Yellow Nutsedge, Henbit, Dandelion, and Marestail on contact.
- Not For Sale to AZ, OR, WA, NM, MT, ID, WY, NV, AK,HI
- Provides post-emergent control of tough-to-control weeds
The only downside we found about Primesource oxalis herbicide is that it is not available for sale in states such as HI, AK, WY AZ, NV, NM, and WA. Unless used with other agricultural products such as fertilizer or tree stump removers, Primesource Meso works effectively when used as a pre-emergent weed killer.
Consider maintaining a Primesource application rate of 4 or 8 fluid ounces, approximately 30 gallons, to kill oxalis per acre for effective and quick results. By being a systemic weed killer, Primesource kills oxalis by inhibiting their photosynthesis.
- inhibits photosynthesis
- fast-acting
- pre- and post-emergent oxalis herbicide
- eco-friendly
- Budget-friendly
- non-staining formula
- comes with a measuring syringe
- Non-selective weed killer
2.Roundup Concentrate Oxalis Killer &Weed Preventer II-Runner Up
Does roundup kill oxalis? Or wondering what is the best Herbicide to control oxalis in sidewalks, parking lot, or even in driveway cracks? Well, Roundup Concentrate, which is a non-selective herbicide, has a glyphosate ingredient that instantly kills oxalis on contact.
Furthermore, roundup concentrate has a dual-action formula made possible by the 18% glyphosate ingredient, covering over 17,000 square feet of lawn with oxalis. Therefore, Roundup Concentrate is an outstanding product for killing new and preventing dead oxalis from re-emerging after death.
- Dual-action formula kills existing weeds and prevents new ones from growing for up to 4 months
- Kills weeds to the root. Guaranteed. Consumer Guarantee: If for any reason you are not satisfied after using this product, simply send us original proof of purchase and we will replace the product or refund the purchase price.
By also being rainproof for 20 minutes, roundup concentrate kills oxalis in both warm and cool-season region .more over it is ready to use product which does not require prior mixing, assembly or measuring.
Round up for a decade has gained popularity from both homeowners and landscapers as it can kill oxalis to their roots. The 18% glyphosate ingredient in a roundup concentrate is equally effective as it can get rid of oxalis in a lawn.
Additionally, it also prevents oxalis from growing or re-emerging for over four months after the first formulation schedule.
- Has 18% glyphosate
- Prevents oxalis for over four months
- Kills other weeds
- Covers over 17,000 square feet
- Fast-acting
- Contact oxalis killer.
- Non-selective oxalis killer( kills all vegetation on contact)
3.RM18 Fast-Acting Weed & Grass Killer Herbicide, 32-ounce-best weed killer for oxalis in lawn
When killing oxalis in flower beds, consider going for a fast-acting product, such as the RM18 Herbicide, 32-ounce. This oxalis flowerbed killer can eradicate both and weeds and grass from your flower bed.
- Makes up to 42 gallons to ready-to-use spray solution
- Treats up to 12, 600 Square feet
To easily kills all the oxalis on contact, the manufacturer recommends wetting your target weed foliage roots and leaves with RM18. Despite being an efficient oxalis eradicator, if RM18 comes into contact with your mouth, consider washing your mouth thoroughly with running water.
With 18% of the total ingredient as glyphosate, RM18 can kill oxalis in a yard or lawn or approximately 3, 000 Square Feet. Moreover, RM18it is a quick-acting herbicide as the glyphosate ingredient present gives visible results in the first 12 hours after formulation.
Other vital ingredients present in RM18, such as salts and diquat dibromide, boost its power, making it an effective herbicide for killing wild blackberry, Kudzu, poison oak, poison ivy, and crabgrass in flower beds.
- fast-acting
- easy to use
- covers 3 000 Square Feet
- gives results In 12 Hours
- Non-staining formula
- Ready to use
- Pet-friendly
- Non- selective
4.Fertilome Lawn Clover And Oxalis Killer For Lawns
Fertilome took the fourth and top position of best weed killer for creeping oxalis in lawns. Being a selective weed killer, Fertilome selectively kills all the oxalis and other broadleaf weeds from your property, leaving behind healthy grass.
The liquid formula allows you to use fertilome as foliar weedkiller killer or by drenching it directly to the soil to prevent oxalis seeds from e-emerging. Additionally, the liquid formula is the reason why fertilome is a non-staining oxalis killer for a lawn. Therefore, fertilome is an outstanding product for eliminating oxalis on sidewalks and in driveway cracks.
- FOR LAWN USE: This lawn weed killer spray won't harm the lawn (when used as directed) and is for use on Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass
- WEED SPRAY COVERAGE: This 16 fl. oz. container of Ortho Chickweed, Clover & Oxalis Killer for Lawns Concentrate is a broadleaf herbicide that treats up to 3,200 sq. ft. of lawn
Interestingly, fertilome is a powerful oxalis herbicide that combines dicamba, propionic acid, and dimethylamine salt, hence killing oxalis to their roots. The dicamba ingredient present prevents oxalis from re-emerging in your lawn for over four months.
Apart from being easy to use, Fertilome is also an easy to apply lawn oxalis weed killer. Fertilome, by being a fast-acting product, can cover 8,000 sq ft Of a lawn or yard with clover, dandelion, and ground ivy plus other 200 broad leaves weed approximately.
By fertilome being a selective weed killer, it is an effective strategy to kill oxalis in Bermuda grass. The dicamba ingredient present is the reason as to why Fertilome was the only product on our list, which is a quick-acting clover and oxalis killer for lawns.
- Easy to use
- Pet friendly
- Covers 8,000 sq ft.
- Has dicamba as the active ingredient
- Non-staining formula
- Selective weed killer
- None
5.Southern Ag Atrazine St. Augustine oxalis Weed Killer 32oz-best selective Oxalis Killer For flowerbed
Are you looking for a way to get rid of oxalis in the grass without causing yellow or brown patches? Well, Southern Ag Atrazine, which a selective for getting rid of oxalis in centipede and St. Augustine grasses, will work great.
- One quart treats 3,720 sq ft
- Controls Weeds in St. Augustine and Centipede Grasses
The 4% Atrazine ingredient present in 2 Southern Ag allows 2 gallons of this Herbicide in water to effectively eradicate oxalis in a 1,000 sq. ft.
Getting rid of sorrel in lawn with Southern Ag Atrazine is also possibles. It is a broadleaf weed. The Atrazine ingredient in the Southern Ag herbicide is effective as it kills yellow wood sorrel in lawn to their roots.
It is also a highly concentered liquid weed killer as One quart Southern Ag Atrazine can treat over 3,720 sq. ft of lawn invested with oxalis.
Moreover, Southern Ag Atrazine was our best pre-emergent for oxalis in all grass varieties as it can kill existing and also preventing oxalis from emerging in a centipede and St. Augustine grass lawn.
- Fast-acting
- doesn’t impair slaps and pavements
- cover 3,720 sq. ft
- Kills oxalis instantly
- no messy residue left
- penetrates in cracks
- kills different types of weeds on contact
- Not eco-friendly
6.Spectracide HG-96587 Lawn Oxalis Weed Killer, 1 Gal
Spectracide is a multipurpose herbicide that kills oxalis in lawns on contact. The one gal product can kill other broadleaf weeds such as chickweed, knotweeds, nettles, and ragworts in the lawn on contact.
Spectracide weed killer is a true definition of an effective and non-staining weed killer that will not leave any residues on pavements and driveway when killing oxalis in cracks. It can knock down all the oxalis growing around your house, flower beds, and even fence liens within 5 hours
- KILLS WEEDS – NOT THE LAWN: When used as directed
- VISIBLE RESULTS IN 5 HOURS: Conquer unruly weeds and see visible results in as fast as 5 hours
For quick oxalis knockdown ability, spectracide works great when the formulation is carried out between 45°F-90°F. With the 0.121% Dicamba ingredients present, spectracide kills weed such as crabgrass, box elder, Yellow nutsedge, sagebrush, leafy spurge, chickweed, and nettles on contact
Moreover, it has a high penetrating ability, which is made possible by the ingredient present; thus, it has a better ability to eliminate all the oxalis present in driveway, sidewalk, and parking lot cracks.
- Knocks out over 470 weeds varieties
- Visible results in 5 hours
- Money-back guarantee
- Long shelf life
- Comes with a liquid formula which is ready to use
- Weighs 89 pounds
7.Blindside WDG FMC Selective Herbicide For Oxalis 8 OZ Bottle-best Selective Herbicide For Oxalis
Of the entire product on our list, today Blindside WDG FMC was the most effective and fast selective Herbicide for oxalis, which comes in an 8 OZ Bottle. Interestingly, it comes with an effective measuring tool that prevents misuse of this product.
With 60% Sulfentrazone and 6% – Metsulfuron-methyl as the active ingredients, Blindside WDG FMC can knock down over 70 plus broadleaf weeds, chickweeds, nettles barnyard grass, clover, black medic, and crabgrass on contact.
- Not for Sale To : AK,AZ,CO,CT,DE,IA,ID,IL,MA,ME,MI,MN,MT,ND,NE,NH,NJ,NM,NV,NY,OH,OK,OR,PA,SD,TN,UT,VA,VT,WA,WI,AK,HI,PR,CA
Furthermore, apart from being a fast-acting weed killer, blindside is 100% efficient as a ½ lb. The bottle can knock down oxalis in a lawn of approximately 50,000 square feet.
Also, blindside has an outstanding non-staining and rainproof formula, making it a quality, warm, and cool-season oxalis poison.
- Ready-to-spray
- Liquid oxalis herbicide
- Convenient tip
- Kills over 70+ weeds
- Outstanding residual impact
- Lasts for seven months
- toxic to pet’s and children
Best Weed Killer For Oxalis (FAQs)
1. What is the best weed killer for oxalis?
The best weed killer for oxalis is a selective broadleaf herbicide containing active ingredients such as triclopyr, fluroxypyr, dicamba, or metsulfuron-methyl, depending on where the weed is growing. For non-lawn areas, a non-selective herbicide like glyphosate can effectively eliminate oxalis, but it will also kill nearby desirable plants.
2. Does vinegar kill oxalis permanently?
No. Vinegar may burn the leaves of oxalis, but it rarely kills the underground bulbs and roots. The plant often regrows within a few weeks, making herbicides specifically labeled for oxalis much more effective for long-term control.
3. When is the best time to spray oxalis?
The ideal time to spray oxalis is when it is actively growing, usually in early spring or fall before it produces seeds. Applying herbicide to young, healthy plants results in better absorption and more effective control.
4. How many herbicide applications does oxalis need?
Most oxalis infestations require two or more applications spaced 2–4 weeks apart. Because oxalis reproduces through bulbs, some plants may survive the first treatment and need follow-up spraying for complete control.
5. Can I kill oxalis without harming my lawn?
Yes. Many selective lawn herbicides are formulated to kill oxalis while leaving established turfgrasses such as Bermuda, Kentucky bluegrass, tall fescue, and zoysia unharmed when used according to the product label.
6. Why does oxalis keep coming back?
Oxalis frequently returns because it spreads through underground bulbs, rhizomes, and seeds. If these underground structures remain alive, new shoots can emerge even after the visible foliage has died. Consistent treatment and proper lawn maintenance help prevent recurring infestations.
7. How can I prevent oxalis from growing again?
To prevent oxalis from returning, maintain a dense, healthy lawn, mulch garden beds, remove weeds before they flower, improve soil health, and apply a suitable pre-emergent herbicide where appropriate. Regular monitoring and early treatment of new plants are the most effective ways to keep oxalis under control.
Conclusion
In conclusion, Primesource Meso 4 SC Select is our best weed killer for oxalis because its mesotrione-based formula provides both pre-emergent and post-emergent control while delivering excellent results in residential lawns, athletic fields, and other turf areas. Its broad-spectrum performance, systemic action, and ability to stop oxalis from spreading make it the top overall choice.
Our runner-up pick is Roundup Concentrate Weed & Grass Killer Plus Weed Preventer II because it offers fast, non-selective control and long-lasting weed prevention in driveways, sidewalks, fence lines, and other non-lawn areas. Its glyphosate-based formula kills oxalis down to the roots while helping prevent new weeds from emerging for several months.
Choosing the best weed killer for oxalis ultimately depends on where the weed is growing and whether you need a selective or non-selective herbicide. Applying the correct product at the right growth stage will maximize control and reduce the likelihood of future infestations.
Before using any herbicide, always read and follow the manufacturer’s label regarding application rates, protective equipment, and safety precautions. With proper application and regular lawn maintenance, you can eliminate oxalis effectively and maintain a healthier, weed-free landscape throughout the growing season.
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