Hi Lucy, I hadn't heard of the roots of the crabapple staying viable after the tree is cut down.
I have no idea how invasive that would be. Good grief. We cut down a single crabapple tree in our yard about 5 years ago, but never saw a reemergence of sprouts. I don't recall using glyphosate on it. OSU extension is a great and trusted resource. Thanks for sharing that article. Very interesting.
Thanks!
