gardenfish said:Hello! What you have is a woody vine, Wisteria, which has been trained as a tree. I'm not sure of the variety; however blooms on these begin in early spring and lasts about a month. If you want to trim it, whack away. I don't think that trimming will prevent it from blooming, though. If you don't like the blooms, you would need to remove them when they're blooming. In your zone blooming could begin as early as next month.
plantladylin said:I wonder if it might be the vine with the common name Evergreen Wisteria (Callerya reticulata)