I have been here several times doing research and need some help.

I have planted numerous things under a Pin oak with no success.

Its a large tree, branches are about 6' above ground. Lots of sun in the afternoon. So i tried sun loving plants, ground covers (adjua), ferns (some of them are coming along) jack in the pulpit, and who knows what else. I am frustrated.

This will be the third try, Any suggestions with successful plantings?

many thanks