Will American Holly interbreed with "Blue Prince"?
There are two parts to his question:
1.) Will a female American Holly produce berries if the only nearby hollies are a male English Holly and a male "Blue Prince" meserve hybrid?
2.) If yes, will the seeds in those berries be fertile and produce volunteers?
3.) If yes, and I am in he natural range of American Holly, should I worry abut this from an environmental perspective?