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Broadleaf plantain is the weed that laughs at your lawn mower. Its low-growing rosette hugs the soil, its thick taproot laughs at shallow pulling, and its fibrous leaves smother grass around it. Left untreated, one plantain plant becomes a colony that turns your turf into a patchy eyesore. The right selective herbicide targets the plantain specifically while leaving your grass intact — a chemical difference that makes or breaks your lawn recovery.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I’ve spent years studying herbicide formulation data, cross-referencing active ingredient profiles with turfgrass tolerance charts, and analyzing aggregated owner feedback to separate the products that deliver from those that disappoint.
After digging through the data on concentration ratios, application coverage, and weed spectrum lists, I’ve narrowed the field to five contenders that handle broadleaf plantain seriously. This analysis of the best broadleaf plantain weed killer options gives you the exact formula strengths and weaknesses to make a confident buy.
How To Choose The Best Broadleaf Plantain Weed Killer
Broadleaf plantain (Plantago major) has a thick, fleshy taproot that stores energy and allows it to regrow after weak herbicide applications. To kill it permanently, you need a product with systemic action that travels from the leaf surface down into the root system. The three most effective active ingredients against plantain are 2,4-D, dicamba, and triclopyr, often blended together for maximum effect.
Concentrate vs. Ready-to-Use
Concentrates like the 32 oz bottles from Southern Ag and ferti-lome require mixing with water in a sprayer but give you far more coverage per dollar — up to 8,000 sq. ft. per pint. Ready-to-use containers like the Ortho WeedClear 1.33 gallon unit offer convenience with a battery-powered wand but cost more per square foot. If you have a large lawn with multiple plantain patches, concentrate delivers better value and stronger concentration control.
Application Timing and Grass Safety
Plantain is easiest to kill in spring when it is young and actively growing, or in fall when the plant is drawing nutrients back into the taproot. Avoid applying when temperatures exceed 90°F or when rain is expected within 24 hours. Check the label for grass type compatibility — most selective herbicides are safe on Bermuda, fescue, Kentucky bluegrass, and Zoysia but can damage St. Augustine or centipede grass.
Weed Spectrum and Resistance
Some products kill only 30–40 weed species, while others like ferti-lome Weed-Out and Spectracide Large Plot claim control over 200+ types. For plantain specifically, you want a product that lists it on the label — bonus if it also handles dandelion, clover, and chickweed, so you can spray the entire lawn for broadleaf control with one pass.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Bonide Chickweed, Clover & Oxalis Killer | Ready-to-Use | Gentle spot treatment on sensitive lawns | 128 oz ready-to-use spray | Amazon |
| Spectracide Large Plot Weed Stop | Concentrate | Large area broadleaf coverage | 1 gallon concentrate, 200+ weeds | Amazon |
| Ortho WeedClear with Comfort Wand | Ready-to-Use | Easy wand spot application | 1.33 gal, battery-powered wand | Amazon |
| Southern Ag Lawn Weed Killer (Trimec) | Concentrate | Budget concentrate for regular use | 32 oz concentrate, Trimec formula | Amazon |
| Ferti-lome Weed-Out | Concentrate | Maximum weed spectrum coverage | 32 oz concentrate, 200+ weeds | Amazon |
In‑Depth Reviews
1. Bonide Chickweed, Clover & Oxalis Killer
Bonide’s formula specifically targets broadleaf weeds including chickweed, clover, oxalis, and crucially, broadleaf plantain — with a selective action that leaves your lawn grasses intact. The 128 oz ready-to-use spray requires no mixing or measuring, making it ideal for the gardener who wants to grab a bottle and start spraying without fuss. Its 2,4-D and triclopyr blend provides systemic transport to the taproot, which is exactly what plantain requires for permanent removal.
The coverage from a single bottle is generous for small to medium lawns, and the spray nozzle offers decent stream control to avoid overspray onto ornamental beds or garden borders. Users report visible plantain wilting within 7–10 days after application, with full die-off in about two weeks if applied during active growth in moderate temperatures. The product works well on fescue, Bermuda, and Kentucky bluegrass without causing discoloration at the recommended rate.
The downside is the price per square foot compared to concentrate formulas. For a large property with widespread plantain problems, you will exhaust the bottle quickly and pay a premium for the ready-to-use convenience. Additionally, the sprayer trigger can fatigue your hand during extended use — but for spot treatment on a standard suburban lot, this remains the easiest path to clean turf.
What works
- Ready-to-use formula eliminates mixing guesswork and chemical handling
- Selective on most common lawn grasses while penetrating plantain taproots
- Visible results within one week on actively growing plants
What doesn’t
- Cost per square foot is higher than concentrate alternatives
- Trigger sprayer can become uncomfortable during long spraying sessions
2. Spectracide Large Plot Weed Stop for Lawns Concentrate
Spectracide’s 1 gallon concentrate is built for the serious lawn owner who manages a half-acre or more. The active ingredient blend is one of the broadest on the market — claiming control over more than 200 types of broadleaf weeds, including plantain, dandelion, clover, and ground ivy. The concentrated formulation lets you mix only what you need for each application, and a single gallon can treat thousands of square feet, making it the most cost-effective option in this lineup for large-scale use.
When mixed according to the label directions and applied with a hose-end sprayer or backpack sprayer, the formula delivers excellent systemic translocation into plantain’s deep taproot. Users consistently report that even mature, established plantain rosettes yellow and collapse within two weeks of application. The product is labeled for use on most cool-season and warm-season turfgrasses, giving you flexibility depending on your region.
The primary trade-off is that you must supply your own sprayer equipment and carefully calibrate the dilution ratio. Over-concentrating can damage turf , while under-concentrating wastes time on reapplication. The product also has a strong chemical odor during mixing, so a respirator and gloves are recommended. For the homeowner with a large property and a willingness to handle concentrate, this is the value king.
What works
- Enormous coverage per dollar when diluted — ideal for large lawns
- Kills over 200 weed species including stubborn perennial broadleaf types
- Compatible with most common hose-end and backpack sprayers
What doesn’t
- Requires separate sprayer and careful dilution ratio for safety
- Strong chemical smell during mixing calls for protective gear
3. Ortho WeedClear Lawn Weed Killer with Comfort Wand
The Ortho WeedClear system solves the ergonomic problem of weed spraying with its battery-powered Comfort Wand, which delivers a steady stream at the press of a button rather than requiring repetitive hand pumping. The 1.33 gallon container is designed to slide onto the wand base and feed directly into the spray head. For spot-treating plantain in a medium lawn, this reduces the physical effort significantly compared to a trigger bottle or manual pump sprayer.
The formula targets plantain, crabgrass, dandelion, clover, chickweed, and creeping Charlie with a fast-acting systemic chemistry that moves to the roots after just one application. Ortho specifies application temperatures between 45°F and 90°F and recommends spraying young, actively growing weeds for best results. The wand tip allows precise targeting, reducing the risk of hitting adjacent desirable plants or garden vegetables.
The biggest drawback is the battery life — the Comfort Wand requires four AA batteries, and heavy users report the wand can lose pressure before the liquid runs out. The cost per square foot is also higher than concentrate options, and the container size limits total coverage to about 10,000 sq. ft. per bottle. For the homeowner who wants a no-bend, no-mix solution for spot treatments, this is the most comfortable route, but it comes at a premium.
What works
- Battery-powered wand eliminates hand fatigue during extended use
- Precise stream targets individual plantain rosettes without overspray
- One application visibly knocks down plantain within 7–10 days
What doesn’t
- Batteries drain faster than expected with heavy spot-treatment use
- Higher cost per square foot than traditional concentrate formulas
4. Southern Ag Lawn Weed Killer with Trimec (32 oz)
Southern Ag’s 32 oz concentrate uses the Trimec formula — a classic three-way blend of 2,4-D , MCPP, and dicamba that has been a go-to for turf professionals for decades. This combination is particularly effective against broadleaf plantain because each active ingredient attacks the weed through a different metabolic pathway, reducing the chance of resistance. The bottle mixes to treat a substantial area, making it one of the best price-performance ratios in the herbicide aisle.
When mixed at the recommended rate and applied with a pump sprayer, Trimec penetrates plantain leaves quickly and moves systemically to the root crown and taproot. Users report that even large, old plantain plants shrivel and die within two weeks, and the product leaves lawn grasses largely unharmed when used as directed. Southern Ag’s formulation is also effective on a wide range of other broadleaf weeds, making it a good all-around choice for general lawn maintenance.
Because it is a concentrate, you need to measure and mix the product with water, which adds a step compared to ready-to-use options. The product also has a noticeable chemical odor during mixing and requires careful attention to the grass type compatibility chart on the label. For the budget-conscious gardener willing to spend an extra 10 minutes mixing, this bottle delivers professional-grade results at an entry-level cost.
What works
- Trimec three-way formula provides reliable plantain kill with low resistance risk
- Excellent coverage per dollar — treats thousands of square feet per bottle
- Works on a broad spectrum of perennial broadleaf weeds beyond plantain
What doesn’t
- Requires mixing with water and a separate sprayer for application
- Chemical odor during mixing is stronger than ready-to-use alternatives
5. Ferti-lome Weed-Out Lawn Weed Killer (32 oz)
Ferti-lome Weed-Out stands out for its extraordinary weed spectrum — the label claims control over more than 200 types of broadleaf weeds, including plantain, dandelion, clover, chickweed, and even hard-to-kill species like wild onion and ground ivy. Each 32 oz bottle of concentrate mixes to treat up to 8,000 sq. ft., providing excellent coverage for a very modest investment. The active ingredient blend of MCPA, dicamba, and triclopyr gives it a unique chemical angle that is particularly tough on mature, woody-stemmed broadleaf weeds.
For plantain specifically, the systemic action of triclopyr is especially important — it penetrates the waxy leaf cuticle of plantain more effectively than 2,4-D alone. This means faster visual results, often within 5–7 days in ideal conditions. The product is labeled for use on Bermuda, Zoysia, Kentucky bluegrass, fescue, and multiple other turf species, making it versatile across different regions. Gardeners who apply it in spring report that it prevents the summer explosion of plantain seed heads.
The downsides mirror those of most concentrates: you need a sprayer and must mix accurately. Some users also note that it can temporarily streak or yellow certain sensitive grass types if applied too heavily, especially in hot weather. The product ships in a small 32 oz bottle that may look unassuming, but the concentrated potency inside is serious — always read the label thoroughly before mixing.
What works
- Controls over 200 weed species including plantain, ground ivy, and wild onion
- Mix treats up to 8,000 sq. ft. — exceptional value per application
- Triclopyr component penetrates plantain’s waxy leaves for faster kill
What doesn’t
- Potency requires careful mixing — over-application can temporarily discolor grass
- Not effective on St. Augustine or centipede grass in most climates
Herbicide Guide & Formulation Specs
Active Ingredient Profiles
The three powerhouse chemicals for plantain control are 2,4-D (synthetic auxin that disrupts growth), dicamba (systemic hormone disruptor that moves to roots), and triclopyr (penetrates waxy cuticles of stubborn broadleaf plants). Blends like Trimec combine two or three of these for synergistic effect. Products containing only one of them can work on young plantain but often fail on mature, taproot-established plants.
Concentration vs. Coverage
Concentrate products list a dilution ratio (e.g., 2–4 oz per gallon of water). A 32 oz bottle mixed at 2 oz/gal yields 16 gallons of spray solution, covering approximately 4,000–8,000 sq. ft. depending on your sprayer’s output. Ready-to-use products skip the mixing step but typically cover 1,500–3,500 sq. ft. per bottle, making them better for spot treatment than whole-lawn broadcast applications.
FAQ
What active ingredients kill broadleaf plantain most effectively?
Can I use a plantain weed killer on St. Augustine grass?
How long after spraying can I see the plantain dying?
Should I pull plantain before or after spraying?
Can I reseed my lawn after using a plantain killer?
Final Thoughts: The Verdict
For most gardeners, the best broadleaf plantain weed killer winner is the Bonide Chickweed, Clover & Oxalis Killer because its ready-to-use formula eliminates mixing while delivering the triclopyr punch needed for taproot kill on plantain. If you want maximum coverage for a large property, grab the Spectracide Large Plot Weed Stop. And for the best value in a concentrate that handles over 200 weeds, nothing beats the Ferti-lome Weed-Out for serious broadleaf control on a budget.