Tree of heaven/hell
I am desperately trying to get rid of a tree of heaven. It grabbed onto a holly so I had it cut - holly is dead this spring - could there be a connection? Didn't know I should have treated before cutting so now have a messy jungle. Pulled off all the new sprouts and posted on neighborhood listserv. Now that I know what it is, really want to get rid of it. Planning hack and treat. What herbicide do you recommend? How often should I apply? Any other tips would be greatly appreciated.
This is one of the toughest invasive trees to tackle. Cutting it down actually stimulates it to resprout from the trunk and roots. Some other methods of killing it reduce the amount of re-suckering problems.
Read through this fact sheet which provides detailed information on methods of removal. The most effective herbicides to use on Tree of Heaven contain either triclopyr or glyphosate. Information on how and when to treat the plants is provided in this link. https://www.invasive.org/weedcd/pdfs/wgw/treeofheaven.pdf
Getting rid of Tree of Heaven is a battle. It will take time and require vigilance to defeat this plant. The most important thing is to simply not let the suckers' leaves carry on photosynthesis and rebuild the root's reserves. You want to exhaust the roots. Each time the plant puts out new leaves and suckers, the tree's remaining roots have to use up part of their root reserves (stored energy in the form of carbohydrates.) So, if you kill the new suckers, you will eventually use up all the root's energy and all parts of it will die.
Refer to additional information on our website.