lilac (wisteria) is a magical vine that provides a cascade of beautiful. A support structure is required for growing plant. A trellis, arbor, or even a fence are ideal locations to display the dainty leaves and dangling blooms. The plant requires consistent moisture, especially in summer. Pruning is still a crucial part of plant care. In areas where it is grown over a structure, prune it hard annually after flowering to keep the vine in check. On horizontal surfaces such as fences, prune in winter to remove side shoots and keep the plant tidy.