Wisteria plants produce clusters of fragrant white, purple, violet-blue, pink or red flowers. Getting the best flowers requires placing wisteria in full sun, and then being patient -- these vines can take a while to bloom.
One major factor can affect your wisteria's bloom time: whether it was started from a seed, cutting or a graft. Grafted vines and vines started from cuttings have a head start over seeds, which undergo a long juvenile period before blooming.
Wisteria blooms may appear within two years after planting but can take as long as 15 years, according to the Kemper Center for Home Gardening. If you began your wisteria from seeds, it may be 20 years before it produces flowers.
Avoid using too much nitrogen fertiliser; instead, use superphosphate each spring. Make sure your wisteria can get at least six hours of full sunlight, and prune it back each winter and early summer.