Last year I bought two vines, a wisteria and a rosa vinca. I was planning on moving and so didn't plant them but left them in their buckets. They grew vines like crazy but of course they never bloomed. Early in april they began to bud, but then nothing. The buds appear to be dried out, and the stems which I did not cut back are wood but with buds.

Are they dead, should I throw them out. Like an idiot I threw out the reciept - even though they had a one year warranty. I should be moving by July. (I am having a house built which is a painfully slow process).

Is it too late to cut back the stems, if they are not dead. Thank you for any response.