5 Best Weed Killer for Oxalis in Lawn 2026: Buyer’s Guide

I've spent the last several weeks digging into the best weed killer for oxalis in lawn options, reading through hundreds of verified buyer reviews, comparing active ingredients, and cross-referencing label claims with what actually works in real yards. Oxalis (sometimes called yellow wood sorrel or creeping woodsorrel) is one of those weeds that laughs at basic broadleaf killers. It comes back from underground bulbs and spreads through explosive seed pods, so you need something that translocates down to the root system.

After all that research, one product clearly stood above the rest for most homeowners.

The Ortho Weed B Gon Chickweed, Clover and Oxalis Killer for Lawns Concentrate earned our Editor's Choice spot because it consistently delivered the highest kill rates across verified buyer reports while being safe for most common lawn grasses when used as directed. But depending on your yard size, budget, and whether you want a fertilizer combo, there are four other strong options worth a look. Here's how they all stack up.

List of Top 5 Best Best Weed Killer for Oxalis in Lawn

I evaluated these five products across three main criteria: active ingredient effectiveness against oxalis specifically, lawn safety when label directions are followed, and real-world kill rates reported by verified buyers. Each product below represents a different approach, from targeted concentrates to broadcast-and-feed combos, so you can match the right tool to your situation.

Below are the list of products:

1. Ortho Weed B Gon Chickweed

Ortho Weed B Gon Chickweed, Clover and Oxalis Killer for Lawns Concentrate is the product I kept coming back to during my research. It's specifically formulated for the weeds that most general broadleaf killers struggle with, and the buyer feedback backs that up with consistently high kill rates on established oxalis patches. If you want a targeted concentrate that goes after the root system without nuking your lawn, this is the one to grab.

Why I picked it

This concentrate uses a three-active-ingredient blend (2,4-D, dicamba, and mecoprop-p) that targets oxalis at the cellular level and translocates into the bulb system. Verified buyer reviews report visible wilting within 48 hours and full plant death within 2 to 3 weeks, even on mature clumps that had survived previous treatments. It's the most consistently effective option I found for oxalis specifically.

Key specs

• Active ingredients: 2,4-D (7.55%), dicamba (0.73%), mecoprop-p (2.76%)
• Form: Liquid concentrate, 16 fl. oz. bottle
• Coverage: Treats up to 6,400 sq. ft. at the standard mix rate
• Target weeds: Oxalis, creeping Charlie, clover, chickweed, plantain
• Lawn-safe for: Kentucky bluegrass, perennial ryegrass, tall fescue, and most common cool-season and warm-season turfgrasses when used as directed
• Rainfast in approximately 6 hours after application

Real-world experience

In our analysis of buyer reports, this product performed best when applied in late spring or early fall, when oxalis is actively growing and pulling the herbicide down into the root zone. Users who applied it during a stretch of dry, sunny weather (above 60°F) saw noticeably faster results than those who sprayed right before a cold snap. Several reviewers noted that a second application 3 to 4 weeks after the first was necessary for dense patches where oxalis had been established for multiple seasons.

One common thread: people who mixed it at the label-recommended rate and used a pump sprayer with a flat-fan nozzle got the most even coverage and the fewest missed spots.

Trade-offs

The 16-ounce bottle covers a lot of ground, but if your oxalis problem spans a full acre, you'll need multiple bottles. A few buyers mentioned that the concentrate has a strong chemical odor during mixing, so you'll want to work in a ventilated area or wear a basic respirator. It's also not labeled for use on St.

Augustinegrass or centipedegrass, so if you're in the Southeast with those turf types, you'll need a different approach. And like all selective herbicides, it works best as part of a broader lawn health program. If you're also thinking about feeding your turf, our guide to the best fall fertilizer for lawns pairs well with a spring oxalis treatment.

2. Bonide Chickweed Clover Oxalis Killer 16

Bonide's Chickweed, Clover and Oxalis Killer is the product I'd recommend if you want a no-nonsense concentrate that's been a staple in the lawn care aisle for years. It uses triclopyr as its primary active ingredient, which is particularly effective against broadleaf weeds that have waxy or hairy leaf surfaces, and oxalis falls squarely into that category. The buyer feedback is remarkably consistent: it works, and it works fast.

Why I picked it

Triclopyr is one of the most effective active ingredients against oxalis and creeping Charlie, and Bonide's formulation delivers it in a concentrated form that gives you precise control over mixing ratios. Verified buyer reviews show a 4.2/5 average rating, with many users reporting complete oxalis elimination after just one or two applications. It's a proven performer that doesn't get enough attention.

Key specs

• Active ingredient: Triclopyr (8.0% as butoxyethyl ester)
• Form: Liquid concentrate, 16 oz. bottle
• Coverage: Approximately 4,000 to 6,400 sq. ft. depending on mix rate and weed density
• Target weeds: Oxalis, chickweed, clover, creeping Charlie, ground ivy, wild violet
• Lawn-safe for: Most established cool-season and warm-season turfgrasses (not labeled for use on carpetgrass or dichondra)
• Apply when weeds are actively growing and temperatures are between 60°F and 85°F

Real-world experience

Buyers who used this product on oxalis reported the fastest visible results of any concentrate in this roundup. Several reviewers noted leaf curling and browning within 24 to 36 hours, with full plant collapse in 7 to 10 days. The consensus among long-term users is that applying in early spring, when oxalis is just starting its growth cycle, gives the best long-term control because the herbicide translocates into the bulb before the plant has a chance to store energy.

Users in the Pacific Northwest and Mid-Atlantic regions, where oxalis thrives in cool, moist conditions, reported particularly strong results. A few buyers paired it with a best sprinkler for hose setup to ensure even watering a day before application, which seemed to improve uptake.

Trade-offs

Triclopyr is a powerful herbicide, and the label restrictions are a bit tighter than some alternatives. You can't use it on food crops, vegetable gardens, or ornamental flower beds, so it's strictly a lawn product. Some buyers noted that the concentrate is thicker than other brands, which can make it harder to mix evenly in a handheld sprayer.

And while it's safe for most turfgrasses, it can cause temporary yellowing on bentgrass or fine fescue if you over-apply. Follow the label rate carefully.

3. Ortho Weed B Gon Chickweed

If you've got a larger lawn and don't want to keep running back to the store, the 32-ounce two-pack of Ortho Weed B Gon Chickweed, Clover & Oxalis Killer is the smart buy. It's the same proven concentrate as our Editor's Choice pick, just in a bigger package that gives you roughly double the coverage per dollar. For anyone dealing with oxalis across a quarter-acre or more, this is the value play.

Why I picked it

Same active ingredient blend as the single 16-ounce bottle (2,4-D, dicamba, mecoprop-p), but the two-pack format drops your per-ounce cost significantly. Verified buyers with larger properties consistently rated this pack higher for value, and the 4.1/5 average reflects solid performance across the board. If you know you'll need multiple applications over a season, buying in bulk just makes sense.

Key specs

• Active ingredients: 2,4-D (7.55%), dicamba (0.73%), mecoprop-p (2.76%)
• Form: Liquid concentrate, 32 oz. total (2 x 16 oz. bottles)
• Coverage: Up to 12,800 sq. ft. at standard mix rate
• Target weeds: Oxalis, creeping Charlie, clover, chickweed, plantain, dandelion
• Lawn-safe for: Kentucky bluegrass, perennial ryegrass, tall fescue, Bermuda, and most common turfgrasses
• Shelf life: 3 to 5 years when stored in a cool, dry location

Real-world experience

Buyers who purchased the two-pack typically used it across two application windows: once in early spring to hit the first flush of oxalis growth, and again in early fall to catch any survivors before they set seed. Reviewers with lawns in the 5,000 to 10,000 sq. ft. range reported that the two-pack was enough for both applications with some left over for spot-treating the following year. Several users mentioned storing the second bottle in their garage over winter without any degradation in effectiveness the next spring.

The most common tip from experienced users: mix only what you need for each application rather than pre-mixing the whole bottle, since diluted solution loses potency after 24 to 48 hours.

Trade-offs

The two-pack is a commitment. If you've got a small patch of oxalis in an otherwise healthy lawn, you'll likely have product left over for years. A few buyers noted that the sprayer calibration instructions on the label assume a larger backpack or pump sprayer, so if you're using a small 1-gallon handheld, you'll need to do your own math to avoid over-application.

And like the single bottle, it's not safe for St. Augustinegrass or centipedegrass lawns.

4. Scotts Turf Builder Weed Feed5

Scotts Turf Builder Weed and Feed5 takes a different approach: it combines a broadleaf weed killer with a slow-release lawn fertilizer in a single granular application. You're not just killing oxalis; you're feeding your grass so it can crowd out future weeds on its own. It's a two-in-one strategy that works well if your lawn is thin or nutrient-depleted, which is often the reason oxalis moved in during the first place.

Why I picked it

This is the highest-rated product in the group at 4.4/5, and the reason is simple: it solves two problems at once. The fertilizer component (28-0-3 NPK ratio) gives your grass a nitrogen boost that helps it outcompete weeds, while the herbicide component targets broadleaf invaders. For homeowners who want a broadcast application rather than spot-spraying, this is the most convenient option on the list.

Key specs

• Type: Granular weed killer plus fertilizer
• Coverage: Up to 4,000 sq. ft. per 11.32 lb. bag
• NPK ratio: 28-0-3 (high nitrogen, no phosphorus, low potassium)
• Target weeds: Dandelion, clover, oxalis, plantain, chickweed, and 200+ other broadleaf weeds
• Application method: Broadcast spreader (drop or rotary)
• Lawn-safe for: All common lawn types when applied as directed
• Best applied to damp grass so granules stick to weed leaves

Real-world experience

Verified buyers reported the best results when they applied Weed and Feed5 to a lightly watered lawn in the early morning, so the granules would adhere to the moist oxalis leaves. The herbicide absorbs through the foliage over the next 24 to 48 hours, while the fertilizer granules wash into the soil with the next rain or irrigation cycle. Users who applied it in late April through mid-May (for cool-season lawns) or late September through October saw the strongest combination of weed kill and grass greening.

Several reviewers noted that while it didn't eliminate oxalis as completely as a dedicated concentrate, it significantly reduced the population and the thickened turf made it much harder for new oxalis to establish. If you're also planning to overseed or renovate thin areas, pairing this with a best fertilizer for grass in spring treatment can accelerate recovery.

Trade-offs

The granular format means you can't target individual oxalis plants without also fertilizing (and potentially stressing) the surrounding grass. It's less precise than a liquid concentrate, and the herbicide component is a general broadleaf formula rather than one specifically optimized for oxalis. A few buyers in warmer climates reported that the high nitrogen content caused excessive top growth that required more frequent mowing.

And because it contains no phosphorus, it's not ideal for new seedings or recently sodded lawns that need phosphorus for root development.

5. Roundup Weed Grass Killer₄ Pump ‘N

Roundup Weed and Grass Killer with Pump 'N Go 2 Sprayer is the nuclear option, and I mean that literally. This is a non-selective, systemic herbicide containing glyphosate, which means it will kill any green plant it touches, grass included. It's not a lawn-safe product.

But if your oxalis has taken over a gravel path, a driveway crack, a fence line, or a garden bed where you plan to replant, this is the fastest way to clear the area completely.

Why I picked it

Sometimes oxalis isn't just in your lawn. It's in the cracks of your patio, along the foundation of your house, or choking out your flower beds. For those non-lawn areas, a selective herbicide won't help because there's no grass to protect.

The Pump 'N Go sprayer makes it easy to target individual plants without dragging out a separate sprayer, and the 1.33-gallon capacity is enough for most perimeter and hardscape treatments.

Key specs

• Active ingredient: Glyphosate (2.0%)
• Form: Ready-to-use liquid with integrated pump sprayer, 1.33 gallons
• Coverage: Varies by weed density; approximately 300 to 500 sq. ft. for spot treatment of dense oxalis
• Target weeds: All vegetation (non-selective)
• Visible results: Yellowing in 12 to 24 hours, full kill in 7 to 14 days
• Rainfast in 30 minutes after application
• Use in: Driveways, patios, fence lines, garden beds (before planting), around trees and shrubs (avoiding bark contact)

Real-world experience

Buyers used this product primarily for oxalis growing in non-lawn areas: between pavers, along chain-link fences, in rock mulch beds, and around the base of sheds. The integrated pump sprayer was a hit with reviewers who didn't want to mix concentrates or deal with a separate sprayer. Several users reported that oxalis in hardscape cracks died completely within 10 days, and because glyphosate translocates to the root system, regrowth was minimal compared to contact-only killers.

One practical tip that came up repeatedly: apply on a calm day with no rain forecast for at least 6 hours, and use a piece of cardboard as a shield to protect any nearby plants you want to keep.

Trade-offs

This is not a lawn product. If you spray it on your grass, the grass dies too. That's obvious, but a few buyers left negative reviews because they didn't read the label and accidentally hit their turf.

Glyphosate is also a controversial ingredient in some municipalities, and certain cities and counties have restrictions on its use. Check your local regulations before buying. The 1.33-gallon sprayer is convenient but not refillable with other products, so once it's empty, you'll need to buy a whole new unit.

How I picked

I started by identifying the five most commonly recommended products for oxalis control across gardening forums, university extension resources, and verified buyer feedback on major retail platforms. From there, I evaluated each product against three benchmarks: active ingredient efficacy against oxalis specifically (not just general broadleaf weeds), lawn safety profile for common turfgrass species, and real-world kill rates as reported by verified purchasers.

I didn't test these products in a controlled field trial. Instead, I analyzed aggregate user reviews across hundreds of data points, cross-referenced label claims with EPA registration data, and compared active ingredient concentrations against recommendations from university cooperative extension programs. I also looked at application convenience, coverage area per unit, and shelf life, since those factors matter when you're planning a season-long weed management strategy.

What I deliberately didn't evaluate was long-term soil impact or effects on beneficial insects. Those are important topics, but they fall outside the scope of a product comparison focused on oxalis kill rates and lawn safety. If you're concerned about environmental impact, I'd recommend checking with your local cooperative extension office for integrated pest management guidance tailored to your region.

Buying guide — what actually matters for best weed killer for oxalis in lawn

Active ingredient is everything

Not all broadleaf herbicides handle oxalis equally. The most effective active ingredients for oxalis control are triclopyr, dicamba, and 2,4-D (used in combination). Glyphosate works but is non-selective, so it's only suitable for non-lawn areas.

Look for products that list oxalis or yellow wood sorrel on the label, not just "broadleaf weeds" in general. A product that says it kills 200+ weeds might still underperform on oxalis if the active ingredient blend isn't right.

Selective vs. non-selective

Selective herbicides kill broadleaf weeds while leaving grass unharmed. Non-selective herbicides (like glyphosate) kill everything. For oxalis growing in your lawn, you need a selective product.

For oxalis in driveways, patios, or garden beds, non-selective is fine and often more effective. Mixing up the two categories is the most common mistake buyers make, and it leads to dead grass patches and frustrated reviews.

Concentrate vs. ready-to-use

Concentrates give you more control over mixing ratios and cover more area per dollar, but they require a separate sprayer and careful measurement. Ready-to-use products (like the Roundup Pump 'N Go) are convenient but cost more per square foot. If you're treating a large lawn, concentrate is the way to go.

If you're spot-treating a few patches, ready-to-use saves time and hassle.

Granular vs. liquid

Granular weed-and-feed products like Scotts Weed Feed5 are easy to apply with a broadcast spreader and fertilize at the same time, but they're less precise than liquid sprays. Liquid concentrates let you target individual oxalis clumps without affecting surrounding grass. For heavy infestations across a large lawn, granular can be a good first pass.

For precision work, liquid wins.

Timing and temperature

Oxalis is most vulnerable when it's actively growing, which means spring (April through May in most zones) and early fall (September through October). Herbicide uptake drops significantly when temperatures are below 50°F or above 85°F. Apply in the morning after dew has dried but before the midday heat, and avoid application if rain is expected within 6 hours (for most concentrates) or 30 minutes (for glyphosate products).

Lawn type compatibility

Always check the label for your specific turfgrass. Most products in this roundup are safe for Kentucky bluegrass, perennial ryegrass, tall fescue, and Bermuda grass. But St.

Augustinegrass, centipedegrass, and bentgrass have different sensitivity levels, and some active ingredients (especially dicamba) can cause damage at higher concentrations. If you're unsure what type of grass you have, your local extension office can help you identify it.

Coverage and value

A 16-ounce concentrate typically covers 4,000 to 6,400 sq. ft. at the standard mix rate. Measure your lawn before buying so you know how much product you'll need. For a 5,000 sq. ft. lawn with moderate oxalis, one 16-ounce bottle is usually enough for one full application.

If you plan to do a spring and fall treatment, the two-pack (32 oz. total) is the better value.

Frequently Asked Questions (FAQ)

What kills oxalis without killing lawn grass?

Selective herbicides containing triclopyr, dicamba, or 2,4-D (or a combination of the three) are the most effective options for killing oxalis while preserving turfgrass. Products like Ortho Weed B Gon Chickweed and Bonide Chickweed Clover Oxalis Killer are specifically formulated for this purpose. Always confirm your grass type is listed on the product label before applying.

How long does it take for weed killer to work on oxalis?

Most selective herbicides show visible wilting within 48 to 72 hours, with full plant death occurring in 2 to 3 weeks. Glyphosate-based products (non-selective) can show results in as little as 12 to 24 hours. Oxalis with established bulb systems may require a second application 3 to 4 weeks after the first for complete elimination.

Can I use Roundup for oxalis in my lawn?

Roundup (glyphosate) is a non-selective herbicide that will kill your grass along with the oxalis. It's effective for oxalis in non-lawn areas like driveways, patios, and garden beds, but it should not be used as a broadcast treatment on turf. For lawn-safe options, choose a selective herbicide instead.

Is it better to spray oxalis in spring or fall?

Both seasons work, but for different reasons. Spring application targets oxalis during its first active growth phase, preventing it from setting seed. Fall application hits the plant when it's translocating nutrients down to the bulbs, which improves root-level kill.

Many experienced lawn care enthusiasts do both: a spring application to reduce the population and a fall application to finish off survivors.

Will oxalis come back after treatment?

Oxalis can regrow from underground bulbs that survive the initial application, and its seeds can remain viable in the soil for years. A single treatment rarely provides permanent control. The best long-term strategy combines herbicide application with improved lawn density (through proper fertilization and overseeding) so that thick turf crowds out new oxalis seedlings before they establish.

Can I fertilize right after applying weed killer?

It depends on the product. If you're using a standalone liquid concentrate, wait at least 48 hours before fertilizing to avoid interfering with herbicide uptake. If you're using a granular weed-and-feed product like Scotts Weed Feed5, the fertilizer is built in, so no separate application is needed.

For best results, focus on building lawn density over time. Our guide to the best fertilizer for grass in spring has solid recommendations for post-treatment feeding.

Final verdict

After comparing all five products across active ingredients, buyer-reported kill rates, lawn safety, and overall value, the Ortho Weed B Gon Chickweed, Clover and Oxalis Killer for Lawns Concentrate (16 oz.) is my top recommendation for most homeowners. It's specifically formulated for oxalis, safe on common turfgrasses, and consistently delivers results that buyers trust.

If you want the fastest visible kill and don't mind a slightly more aggressive active ingredient, the Bonide Chickweed Clover Oxalis Killer is an excellent alternative with triclopyr as its backbone. For larger lawns where value matters, the Ortho two-pack gives you the same proven formula at a lower per-ounce cost.

If your oxalis problem extends beyond the lawn into driveways, patios, or garden beds, grab the Roundup Pump 'N Go for those non-lawn areas. And if your lawn is thin and you want to kill weeds while feeding your grass, the Scotts Turf Builder Weed Feed5 is the convenient all-in-one option.

Whichever product you choose, remember that oxalis is a persistent weed. Pair your herbicide application with good mowing habits, proper fertilization, and dense turf, and you'll stay ahead of it season after season.

Affiliate disclosure: This post contains affiliate links. If you buy through one of these links, I may earn a small commission at no extra cost to you. It never changes my recommendation, I only suggest gear I'd actually buy myself.