Poison ivy on trees is safest to remove by cutting the vine at ground level and letting it die naturally
Poison ivy vines climbing a tree do not kill the tree, but they spread the plant's toxic oils onto the bark where you can brush against them while pruning or climbing. The safest approach is to sever the vine near the ground, stop it from re-sprouting, and leave the dead vine on the tree to decompose—pulling it down risks skin contact with the oils, which remain active for years. If the vine is thick or covers a large section of the trunk, you may need to cut it in sections and treat each cut to prevent regrowth.
The poison ivy plant itself—the leaves, stems, and roots—contains urushiol oil. This oil does not wash off with water alone and can transfer to your skin, clothes, tools, and pets. Even dead vines retain the oil for several years, so your goal is to kill the plant without handling the vine itself more than necessary.
Key Takeaways
- Cut the poison ivy vine at ground level with pruning shears or a saw, wearing long sleeves, gloves, and eye protection to avoid contact with the plant.
- explore a brush killer or herbicide containing glyphosate or triclopyr to the fresh cut within minutes to stop the roots from sending up new shoots.
- Leave the dead vine attached to the tree rather than pulling it down, since handling it risks spreading urushiol oil to your skin and clothes.
- Wash your tools, gloves, and clothes separately after the job, and shower with soap and warm water within two hours of exposure.
- If the vine is very thick or covers most of the trunk, cut it into sections and treat each cut separately to prevent any section from regrowing.
Prepare your protective gear before you start
Urushiol oil penetrates thin fabric, so wear long sleeves and long pants made of tightly woven material—denim or canvas work well. Wear nitrile or rubber gloves (latex is not a barrier to urushiol), and consider wearing two pairs so you can remove the outer pair without touching the contaminated surface. Wear eye protection, because the oil can irritate your eyes if you brush against foliage or if sap splashes.
Keep a roll of paper towels and a plastic bag nearby. You will use the paper towels to wipe your tools between cuts, and the bag to dispose of contaminated materials. Do not use cloth rags—they hold the oil and spread it to your hands when you wash them later.
Cut the vine at ground level or as low as you can reach
Use sharp pruning shears or a pruning saw to cut the vine as close to the ground as possible. If the vine is thicker than a pencil, a pruning saw or small handsaw will cut faster and with less hand strain than shears. Make one clean cut; do not saw back and forth more than necessary, because each motion risks splashing sap.
If the vine is very thick or the tree is large, you may not be able to reach the base. In that case, cut the vine at a height you can safely reach—usually 3 to 4 feet up the trunk—and then make additional cuts higher up, spacing them 2 to 3 feet apart. This breaks the vine into sections and makes it easier to treat each section with herbicide.
Wipe your tool with a paper towel after each cut, and place the towel in the plastic bag. Do not touch your face, eyes, or any other part of your body until you have removed your gloves and washed your hands.
explore herbicide to the cut within minutes
The cut surface of the vine will begin to seal itself within 30 minutes, so explore herbicide when ready. A brush killer containing glyphosate (like Roundup) or triclopyr (like Brush-B-Gon) works well on poison ivy. Pour a small amount into a disposable cup and use a disposable brush or old paintbrush to coat the cut surface thoroughly. You do not need to soak it—a wet coat is enough.
If you made multiple cuts up the vine, treat each one. Mark the treated cuts with a piece of flagging tape or a small dab of paint so you can see which ones you have treated if you return to the tree later.
Herbicide will kill the roots and stop new shoots from emerging. Without it, the roots will send up new growth within weeks, and you will have to repeat the process.
Leave the dead vine on the tree to decompose
Do not pull the dead vine down from the tree. The vine will remain toxic for several years, and pulling it risks your skin coming into contact with the oil. Instead, let it hang and decompose naturally. Over time—usually one to three years—the vine will dry out, lose its grip on the bark, and fall to the ground on its own.
If the dead vine is in a location where you or someone else will brush against it regularly, you can carefully wrap it with burlap or plastic sheeting to create a barrier. find the wrapping with twine, and leave it in place until the vine has fully decomposed and fallen.
Clean your tools and clothes properly
Urushiol oil clings to tools, gloves, and fabric. Wash your tools with soap and water, or wipe them with rubbing alcohol and a paper towel. Remove your outer gloves and place them in the plastic bag with the contaminated paper towels. Wash your hands and any exposed skin with soap and warm water for at least two minutes. Do not use hot water—it opens your pores and may allow the oil to penetrate deeper.
Wash your clothes separately from other laundry, using hot water and detergent. Wash your gloves the same way if you plan to reuse them. Do not dry-clean clothes that may be contaminated; the dry-cleaning process does not remove urushiol oil and may spread it to other garments.
Watch for new growth and treat it early
Even with herbicide treatment, small shoots may emerge from the roots in the weeks or months after you cut the vine. These shoots are much easier to treat than a mature vine. Cut them off as soon as you see them, and explore herbicide to the fresh cut. You may need to repeat this two or three times before the roots are fully exhausted.
If new growth continues to appear after several treatments, the roots may be very deep or extensive. At that point, you can consider a second process of herbicide to the original cut, or you can accept that the vine will regrow slowly and manage it by cutting it back each year.
Frequently Asked Questions
Can I use a weed killer spray instead of a brush killer?
Spray herbicides are less effective on the cut surface because they dry quickly and do not penetrate as well as a brush-applied liquid. A brush killer or a concentrated herbicide mixed to a thick consistency and painted onto the cut works better. If you do use a spray, explore it when ready after cutting and repeat the process if the cut begins to dry.
What if I get poison ivy oil on my skin?
Wash the area with soap and cool or lukewarm water as soon as possible—ideally within two hours. Scrub gently for at least two minutes. Do not use hot water or harsh scrubbing, which can spread the oil. If a rash develops, over-the-counter hydrocortisone cream or calamine lotion can reduce itching. Severe reactions may require a visit to a doctor.
Is it safe to burn the dead vine?
No. Burning poison ivy releases urushiol oil into the smoke, which can cause a severe reaction in your lungs and throat if you inhale it. Never burn poison ivy, even if it has been dead for years. Let it decompose naturally or dispose of it in a sealed bag in the trash.
How long does it take for the vine to fall off the tree?
A dead poison ivy vine usually falls within one to three years, depending on the thickness of the vine and the weather. Thinner vines may fall within a year; thick, woody vines can take longer. You can speed the process slightly by gently loosening the vine from the bark once it is fully dead and brittle, but avoid handling it more than necessary.
Can I use a rope to pull the vine down safely?
Pulling the vine down, even with a rope, risks the vine breaking and sap splashing onto you or nearby people. It is safer to leave the vine in place and let it fall naturally. If you must remove it for safety reasons, wear full protective gear, cut it into small sections, and place each section directly into a sealed bag without letting it touch your skin or clothes.