Removing Large Poison Ivy Vines from Trees Safely

A thick, arm-sized poison ivy vine climbing high into a tree requires careful herbicide application to avoid contact with the urushiol oil that causes severe allergic reactions.

Effective Herbicide Methods

Cut-stump treatment (recommended for large vines):

1. Cut the vine near ground level with loppers or saw.
2. Immediately (within 5 minutes) apply concentrated glyphosate (Roundup, 41% or higher) or triclopyr to the fresh cut surface on the rooted stump.
3. Use a paintbrush or sponge applicator to avoid drift.
4. The vine in the tree will die and can be left to decompose or removed later (wear protection).

Foliar spray (if leaves accessible):

• Spray glyphosate or triclopyr on vine foliage on a calm day.
• Add surfactant for waxy leaves.
• Vine must be actively growing (not drought-stressed).

Critical Safety Precautions

• Wear full protection: Long sleeves, pants, gloves (nitrile or heavy rubber), goggles, boots.
• Never burn poison ivy: Smoke carries urushiol—causes severe lung damage.
• Wash immediately after: Use strong soap (Tecnu, Dawn) and cold water. Wash clothes separately.
• Tools: Clean with rubbing alcohol or soap after use.

Alternative Non-Chemical Methods

• Smothering: Cover cut stump and root zone with heavy black plastic for 6+ months.
• Repeated cutting: Cut regrowth every 2 weeks until reserves exhausted (labor-intensive).

Why Not Pull the Vine Down?

Pulling a thick, high vine showers you with sap and debris. The vine is also tightly attached—removal damages tree bark. Let the dead vine fall naturally after herbicide treatment.

Glyphosate (systemic) or triclopyr (broadleaf-specific) are both effective. Triclopyr is preferred near desirable grasses. Apply in late spring to early fall when vine is actively translocating to roots.