We have clematis growing where we did not expect (we only moved here in July last year) all are doing well, I do know that you have to plant them deeper than other plants as you can get 'clematis wilt' where it appears to die but can regrow later from below. Also the roots need to be shaded by stones, Montanas seem to be very tough, we had an enormous one back in Oxfordshire.
We lost a hebe in the frosts and the fuchsias all died back, we just cut off the dead branches and its regrown very well D)