yeah.. some of those young 'uns are stubborn. last two winters, i had few 1 gal cuttings that didn't go dormant, and kept on growing came spring. this yr, we had little cold spell early and almost all of the young plants dropped leave and gone dormant. i left most of them out in below 32 degree before taking them in. few nights of that and that seems to have done the trick.. or maybe they are all dead :)