Invasive plant species threaten many habitats including forests across Indiana. The introduced Asian tree-of-heaven (Ailanthus altissima) is one of these aggressive and troublesome invaders.

Tree of Heaven (Ailanthus altissima) is a plant with so many strikes against it that it has largely struck out with gardeners. Who wants an invasive plant that smells bad (like burned or rancid peanut ...

The Tree of Heaven (TOH) may appear to most as just another pretty tree. With airy frond-like leaves and large bunches of flowers visible on some in the Spring, the tree has become a common site in ...