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.
Poison ivy sneaks up through your yard, spreads underground, and every accidental brush costs you days of itching. You want it gone at the root, not just burned off the leaves. The hardest part is choosing which herbicide actually stops regrowth instead of just forcing a second spray next spring. This guide focuses on the formulas that deliver a real root kill — which ones work and which leave you spraying the same patch next year.
I’m Rikta, founder and writer of Lawn Gear Lab. This guide compares manufacturer specifications and patterns in verified customer reviews so you get each pick’s real strengths and trade-offs, not marketing claims.
The goal is simple: match you with the best poison ivy killer for your infestation — if you need a ready-to-use spray for a small patch or a concentrate that covers an acre of brush.
Quick Picks
- Bonide 332 Herbicide Poison Ivy & Brush — Acre-Sized Defeat
- Image Brush & Vine Killer Concentrate, 32 oz — Best Value
- BioAdvanced Extended Control Brush Killer — Extended Control
- Monterey Brush and Vine Control Bundled — Stump Specialist
- The Scotts Ortho Max Poison Ivy Tough Brush — Pro Root Kill
- Pro Brush & Poison Ivy Killer — Dual-Action Diesel
- Ortho 0475010 MAX Poison Ivy & Tough Brush — Budget Spot-Spray
How To Choose The Best Poison Ivy Killer
Choosing the right herbicide starts with understanding how poison ivy lives. It is a woody perennial vine with deep, waxy roots that store energy — a simple top-kill spray will only make it come back stronger. Look for a systemic formula (a chemical that travels through the plant’s vascular system to kill the entire root network) with active ingredients like triclopyr, 2,4-D, or dicamba. Ready-to-use bottles are convenient for small patches, but for serious invasions a concentrate is more economical and effective once you mix it yourself.
Ready-to-Use vs. Concentrate
A ready-to-use spray comes pre-mixed in a bottle with a trigger nozzle, so you point and spray without measuring. This is ideal for a handful of vines in a flower bed or along a fence line where you need quick, small-scale action. A concentrate, on the other hand, requires mixing with water in a tank sprayer but gives you far more coverage per dollar and lets you adjust the strength — helpful when you are facing a large patch, climbing vines, or stump regrowth.
The Active Ingredient Combo That Works
The most effective poison ivy killers on the market pair triclopyr (a synthetic auxin that disrupts growth in broadleaf plants and woody species) with either 2,4-D or dicamba. Triclopyr tackles the woody stems and roots; 2,4-D and dicamba widen the weed-spectrum kill and improve control in cooler weather. Products that rely on glyphosate alone (the active ingredient in many general weed killers) often fail against mature poison ivy because the waxy leaves repel the spray. Look for “triclopyr” plainly marked on the label if you want a defined category-specific choice.
Quick Comparison
| Model | Best For | Coverage Per Unit | Liquid Volume | Item Weight | Amazon |
|---|---|---|---|---|---|
| Bonide 332 Poison Ivy & Brush Killer | Large acreage treatment | 240+ weeds | 128 fl oz | 8.6 lb | Amazon |
| Image Brush & Vine Killer Concentrate | Excellent value for large coverage | 4,000 sq ft | 32 fl oz | 2 lb | Amazon |
| BioAdvanced Extended Control Brush Killer | Long-lasting prevention | 500 sq ft | 128 fl oz | 8.51 lb | Amazon |
| Monterey Brush and Vine Control | Stump killing & resprout control | — | 32 fl oz | — | Amazon |
| Ortho MAX Poison Ivy Killer (32 oz) | Aggressive root kill on established vines | ~1,000 sq ft/gal | 32 fl oz | 32 oz | Amazon |
| Pro Brush & Poison Ivy Killer | Fleet-of-foot acre-level treatment | 2-4 pt per acre | 32 fl oz | 2.5 lb | Amazon |
| Ortho MAX Poison Ivy Ready-To-Use (24 oz) | Quick spot-spray for small patches | Non-selective | 24 fl oz | 1.13 lb | Amazon |
In‑Depth Reviews
1. Bonide 332 Herbicide Poison Ivy & Brush Killer Concentrate
A triple-active concentrate in a gallon jug that kills deep-rooted vines across entire property lines.
For a full acre of poison ivy, poison oak, or kudzu, this Bonide concentrate saves you from mid-season refills. It carries 13.72% MCPA, 1.56% triclopyr, and 1.35% dicamba — a combination that penetrates waxy leaves and woody stems — and the manufacturer says it kills over 240 types of weeds and woody brush while leaving lawn grasses safe when applied per the label. You need a tank sprayer to mix it with water, but the 128-fluid-ounce bottle gives you far more volume than any 32-ounce concentrate here.
Buyers report that it “kills poison ivy, oak, sumac, and other allergenic vines permanently by destroying root systems,” especially on hot, sunny days with at least 48 hours of no rain. One reviewer noted that “on some ivy ground cover it takes 2 or 3 treatments to begin to see results.” At 8.6 pounds, the bottle is the heaviest in this lineup — a trade-off for full-acre capacity. Bonide demands careful timing: best results come when the poison ivy is fully leafed out and you can commit to a 48-hour rain-free window.
That gallon jug gives it a volume advantage over the Image Brush & Vine Killer, which covers more square feet per ounce but comes in a smaller 32-ounce bottle.
kills poison ivy fast: Best if you have acreage, thick brush, or a multi-year regrowth issue you want to end with one purchase.
needs rain-free window: You just need a quick spot-spray for a few vines in a flower bed — get a ready-to-use for that.
right for: Property owners facing deep-rooted poison ivy across a large area who have a tank sprayer and can plan around a 48-hour dry window.
not for: Anyone who wants a grab-and-go bottle with no mixing.
2. Image Brush & Vine Killer Concentrate, 32 oz
More square footage per dollar than any other pick here — a single 32-ounce bottle treats 4,000 square feet.
No other product in this list covers more ground per dollar than the Image Brush & Vine Killer. A single 32-ounce bottle treats up to 4,000 square feet — eight times the 500-square-foot limit of the BioAdvanced concentrate. You can walk a whole hillside once and not need a refill. Its targeted action kills poison ivy, poison oak, poison sumac, wild blackberry, kudzu, and horsetail brush all the way down to the roots.
Owners mention that it “successfully killed poison ivy on a tree within one week,” with leaves turning brown and missed vines dying after a second application. One buyer mentioned that you need a surfactant (a spreader-sticker chemical that helps the spray cling to waxy leaves) — they used a squirt of dish soap in the tank and saw dramatic improvement. At just 2 pounds per bottle, it is also noticeably lighter than the 8.51-pound BioAdvanced jug, which matters when you are carrying the sprayer up a slope.
The trade-off: this is strictly a concentrate, so you need a pump sprayer, and without a surfactant the thick poison ivy leaves can reject the droplet before the chemical absorbs.
covers large areas
- 4,000 sq ft coverage from a 32 oz bottle
- Effective on kudzu and wild blackberries as well as poison ivy
- Only 2 lb — easy to carry to remote patches
takes days to work
- Needs a surfactant added for best leaf adhesion
- Must be mixed and used in a tank sprayer
reach for this if: You have a large area (think 4,000 sq ft of infested woods) and want the lowest cost per square foot in this guide.
look elsewhere if: You do not own a sprayer or do not want to mix chemicals.
3. BioAdvanced Extended Control Brush Killer – Bamboo Killer Spray
A ready-to-use gallon the manufacturer says stops regrowth for up to 365 days — no mixing required.
What sets the BioAdvanced apart from other ready-to-use sprays is its claimed long-term prevention: the manufacturer says it stops regrowth for up to 365 days by working systemically through the leaves and down into the roots. That matters if you keep seeing the same poison ivy re-emerge every spring. The formula tackles bamboo, poison ivy, poison oak, blackberry, kudzu, and English ivy, and it comes in a full 128-fluid-ounce (1 gallon) ready-to-spray bottle — so no mixing, no pouring.
Customers note that it “removed bush regrowth; sprayed before 1-week trip” and found “all regrowth withered, no regrowth in 2+ months.” But coverage tops out at 500 square feet, which is a sharp contrast to the Image concentrate’s 4,000 sq ft reach from a smaller bottle. The 8.51-pound weight (7.5x heavier than the 1.13-pound Ortho ready-to-use bottle) reflects the huge liquid volume but also means you are lugging a heavy gallon around the yard. A few customers noted the nozzle output is limited, so covering the full 500 square feet can take time.
If your problem area is moderate in size (say, a wooded edge or a fence line) and you want one application that claims to last through four seasons, this is the easiest way to get there without mixing concentrate.
reach for this if: You want a grab-and-spray solution for a small-to-medium patch and hate reapplying every spring.
look elsewhere if: Your infestation covers more than 500 square feet or you prefer a lighter bottle to carry.
4. Monterey Brush and Vine Control Bundled with Measuring Spoon
Designed for a specific job: painting undiluted chemical onto cut stumps to stop resprouting.
Monterey positions its Brush and Vine Control for a very specific job: killing freshly cut stumps and preventing resprouting. The active ingredient is triclopyr, and the label instructs you to apply the chemical undiluted directly onto the cut stump with a paintbrush for the best effect on stumps. For poison ivy vines climbing trees, that means you cut the vine at the base, then paint the fresh cut — no spray drift, no wasted product, and a higher kill rate on the stump than a spray application.
Reviewers point out that it was “very effective after a second application on poison ivy” and that they would “purchase again.” Another called it “the best vine and weed killer” they have ever used, noting that it “goes a long way in killing roots and stopping them from coming back.” The bottle arrives bundled with a measuring spoon, which removes the guesswork from mixing the concentrate for spray applications. However, this is a 32-ounce bottle, so it cannot compete with the Bonide gallon for raw volume — pick it when the job is about precision, not area coverage.
Rain within 24 hours of application can reduce effectiveness, so plan your treatment around a dry day. For stump work, the undiluted method is unbeatable.
right for: Anyone with cut tree stumps or climbing poison ivy vines where you can access the cut base — this prevents regrowth better than a spray.
not for: Broad-area spraying of large infestations (use the Image or Bonide concentrate for that).
5. The Scotts Ortho Max Poison Ivy Tough Brush Killer, 32-Ounce
Users call this their “only go-to for pi eradication” — it is rainproof in 2 hours, the quickest rain-safe window here.
When shoppers say “my only go to for pi eradication,” they are usually talking about this Ortho Max concentrate. It kills over 60 types of tough brush and weeds including poison ivy, poison oak, kudzu, and wild blackberries, and it is rainproof in just 2 hours — a faster rain-safe window than the Monterey’s 24-hour requirement. The manufacturer recommends mixing at 6 fluid ounces per gallon, giving roughly 1,000 square feet of coverage per gallon of mixture.
One owner reported that they “mixed stronger (75/25) killed thick vines/ivy within weeks” and saw “no regrowth after 2 years.” Another reviewer noted the same long-term success, calling it “the only product that works on poison ivy” after trying many other brands. The trade-off is that it works slowly — visible yellowing takes about 3 weeks, and you need to be careful with overspray because it can kill shrubs and other desirable plants nearby.
The 32-ounce bottle is lightweight compared to the gallon jugs, but because it is a concentrate, you still need a tank sprayer and some patience for the systemic kill to reach the deep roots.
trusted by gardeners
- Rainproof in 2 hours — quickest rain-safe window here
- Users report no regrowth for 2 years after a strong mix
- Kills 60+ tough brush species, not just poison ivy
strong chemical smell
- Slow action — can take 3+ weeks to see full yellowing
- Overspray easily kills nearby desirable plants
reach for this if: You have a moderate patch of established poison ivy and want a rainproof mix that users swear by for two-year regrowth prevention.
look elsewhere if: You need immediate visible results or cannot control overspray around flower beds.
6. Pro Brush & Poison Ivy Killer – 32 oz Concentrate
A cool-weather concentrate that keeps working when temperatures drop in early spring or late fall.
Most poison ivy killers lose effectiveness once temperatures drop, but the Pro Brush & Poison Ivy Killer from Liquid Harvest pairs triclopyr with 2,4-D. That combination allows it to perform well in both cool and warm weather, and it can be applied during the plant’s dormant season as well as during active growth. The label recommends 1.3 to 5.3 ounces per gallon of water, with an acre-level coverage rate of 2 to 4 pints per acre.
Buyers report that plants “droop in hours, full yellowing/browning in weeks” with one bottle yielding about two treatments for a moderate area. One customer observed that adding a surfactant improves effectiveness and that two monthly treatments reached the roots without harming the lawn grass. However, they also mentioned that it likely needs a third treatment for the most stubborn vines — so while the initial knockdown is fast, total root eradication may take a few rounds. The 2.5-pound bottle is surprisingly light for a concentrate, making it easy to carry while walking a property line.
Unlike the Ortho Max, which needs warm conditions for best results, this one keeps pressure on the ivy in shoulder seasons.
reach for this if: You need a flexible spray window — applies in cool weather and even during dormancy — making spring and fall treatment viable.
look elsewhere if: You want a one-and-done application; stubborn vines may require a second or third treatment.
7. Ortho 0475010 MAX Poison Ivy & Tough Brush Killer Ready-To-Use, 24-Ounce
The simplest entry-level spray — no mixing, no measuring, just point and spray.
If you see three poison ivy vines poking through the edge of your shrubbery and just want them gone without measuring or mixing, the Ortho MAX Ready-To-Use is exactly that. It comes in a 24-ounce trigger bottle with no dilution needed — point the nozzle and spray. It kills over 60 types of tough brush and weeds, works on woody plants including stumps and vines, and is rainproof in 2 hours, just like its concentrate sibling. The 1.13-pound bottle is the lightest in this guide, so it is easy to hold in one hand while you push branches aside.
Owners mention it is “100% effective on poison oak in Northern California,” with leaves turning yellow in about 2 weeks and full death in about one month. Another reviewer simply stated “it works” after giving the bottle to a neighbor with poison ivy in his tree. The catch is volume: at 24 fluid ounces, you are paying a premium per ounce compared to any concentrate, and the small bottle runs out fast if you have a real infestation. One customer’s honest assessment: “effective, but slow-acting” — you have to be patient for the systemic kill to travel through the waxy leaves.
Use this for quick touch-ups after the big spray, or for a first-time buyer who is not ready to invest in a tank sprayer and concentrate.
right for: Occasional users with a small patch of poison ivy who want low commitment and zero mixing.
not for: Anyone with more than a few small vines — the price-per-ounce is too high for acre-level work.
Understanding the Specs
Triclopyr
This is a synthetic auxin herbicide (a chemical compound that mimics natural plant growth hormones, causing uncontrolled growth that kills the plant). It is the primary active ingredient you want in a poison ivy killer because it penetrates waxy leaves and woody stems. Products with triclopyr — paired with 2,4-D or dicamba — reliably kill deep-rooted vines and stop regrowth better than glyphosate-only formulas.
Coverage Rate
This tells you how many square feet a single bottle or gallon of mixture treats. Concentrates like the Image Brush & Vine Killer, which the maker says treats 4,000 square feet per 32-ounce bottle, give you far more reach than a ready-to-use like the BioAdvanced (500 square feet per gallon). Always match the coverage rate to the size of your infestation — a large patch calls for a high-coverage concentrate to avoid buying multiple bottles.
FAQ
Can I use a general weed killer on poison ivy?
How long does a poison ivy killer take to work?
Will a poison ivy killer harm my lawn grass?
What is the difference between ready-to-use and concentrate?
How do I apply a poison ivy killer to a tree trunk without killing the tree?
Should I add a surfactant to my herbicide mix?
Will rain wash off the spray before it works?
What safety gear do I need when spraying poison ivy killer?
Will the spray kill the roots or just the leaves?
How many treatments does poison ivy usually need?
Final Thoughts: The Verdict
For most people, the poison ivy killer that balances power, coverage, and value is the Bonide 332 — its triple-active formula in a 128-fluid-ounce jug handles acre-level infestations without needing a second bottle. If you want the best coverage per dollar, grab the Image Brush & Vine Killer, which treats 4,000 square feet from a 32-ounce bottle. And for a quick spot-spray with no mixing, the Ortho MAX Ready-To-Use is the simplest way to hit a few vines in your flower bed.
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 July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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