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Tree of Heaven

Ailanthus altissima

Medium threat

Invasive tree and the preferred host of the Spotted Lanternfly. Grows fast, crowds out native trees, and helps lanternflies thrive.

Identification Tips

  • •Large compound leaves with 11–41 leaflets, each with a notched base and a small lobe near the tip.
  • •Bark is smooth and gray, resembling cantaloupe skin on mature trees.
  • •Crushed leaves and broken twigs give off a strong, rancid-peanut odor.

Geographic Spread

Widespread across the U.S. Spreads by seed and aggressive root suckers, forming dense thickets that suppress native forest.

Removal Guide

  • •Pull seedlings by hand when small; remove the entire root.
  • •For mature trees, cut and immediately treat the stump with herbicide — cutting alone triggers more suckers.
  • •Target female (seed-producing) trees first.

Prevention

  • •Don't plant or move Tree of Heaven.
  • •Monitor cut stumps for regrowth and re-treat.
  • •Report clusters so land managers can prioritize removal.

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