Mature height is about a foot. You will find your plant has a sprawling habit and will spread 15 to 18 inches. Monthly applications of a balanced fertilizer will encourage good growth and flower production. It produces a lot of foliage and tries to run all over the place, but it has never bloomed. I have pruned it yearly to force it to grow upward and bushy.
Wisteria can take years to bloom.
Wisteria grown from seed may take eight to 15 years to mature and to flower. Grafted wisterias will flower sooner because the portion that is grafted is taken from a mature plant that is already flowering. To make sure you have a grafted plant, look for the graft union, a slight bulge on the trunk right at, or slightly below, the soil line. Be patient, and eventually your vine will flower. Root pruning might force your wisteria into flowering.