Ailanthus, also known as tree-of-heaven is a persistent and aggressive weed throughout much of Europe. The tree is native to a region extending from China south to Australia. Once established the plant is very difficult to be eradicated since cutting the main trunk stimulates new suckering. Gjirokastra castle has a heavy infestation from this invasive plant that it has overtaken the native vegetation and is also causing structural damage to the castle itself.
The project will involve eradication of the invasive tree and replacement with native plants. Herbicide applications will be according to ?Cut Stump? and ?Hack and Squirt? method that secure no non-target injury