An ailanthus tree, age about 20 years, grows out of the concrete barrier between a neighboring building in the back courtyard of my apt.building.
I want to save the tree. Can it be kept?
The Ailanthus altissima tree is no angel and quite invasive. Growing out of the concrete shows what a thug it is. We love trees but this one is not needed, not a native to the U.S., not helpful displacing native plants, which may affect wildlife.
http://www.ecolandscaping.org/05/invasive-plants/tree-of-heaven-an-exotic-invasive-plant-fact-sheet/ More here:
Courtesy of the NYBG Plant Information Service