I've got a very small elderberry tree that has seeded itself in a tight space in between a mature spirea and an even more mature buddleia. There's absolutely no space to get in there and dig the bugger out.
Any suggestions on how to deal with it? At the moment, it's about 4 stems, each approx 2-3 feet long.
If I just cut the growing bits right back, it'll just keep growing, won't it?