My very large wisteria has plenty of beautiful blooms in the spring, but the leaves come on before the blooms (or at the same time) and almost completely cover the blooms. I prune after blooming and in the winter also. I don't know what I'm doing wrong.
Why Do My Wisteria Tree Leaves Cover the Blooms Every Year
This link will take you to a page of articles featuring wisteria: http://www.google.com/cse?cx=012078378210706707791%3Af1h5n_k1r5e&ie=UTF-8&q=prune+perennial+salvia&oq=prune+perennial+salvia&gs_l=partner.3...644499.649498.0.6504126.96.36.199.188.8.131.529.3029.0j18j1j1.20.0.gsnos%2Cn%3D13..0.0.5016j1304226j22..1ac.1.WBNSZ4OEcxo#gsc.tab=0&gsc.q=wisteria%20leaves%20cover%20blooms
I have no ready answer to your question, sorry.