Timothy Norton wrote:I am leaning towards you are facing zone edge issues as an explanation but it is an educated guess. The winter might be killing everything above the ground but the roots persist. It can grow only so much before the next winter knocks it out.
Yes, that seems to be the case every year.
It seems like the Northern Herald® Redbud Tree is rated as zone 3. On another forum, someone mentioned that the Eastern Redbud with either the "Wisconsin strain" or "Columbus Strain" will grow in my area. Now I just have to find a local nursery that carries them.
Thank you for all the help.