spring buds on young hornbeam won't open
We planted a young hornbeam last spring. This spring it budded and the buds began to swell but they seem to have gotten stuck and weeks have passed without them opening to leaves.
Any ideas? The tree seems to be still alive.
It's in a spot that is shaded all winter and the soil there froze very hard but the soil has long since thawed and warmed. Have the root area covered in mulch (bark).
It has had plenty of water going into and emerging from winter.