Japanese Wisteria Yae-kokuryu This climbing wisteria is suitable for the larger garden, as it can grow very big; it will need the support of a stout pergola or large house wall, with supports. Wisteria floribunda Violacea Plena is a big, fast-growing, deciduous climber, and twines anti-clockwise. The long leaves are divided into numerous leaflets. Pea-like flowers appear in May and June, in long, drooping clusters, double, violet-blue, and scented. This climber is good in an architectural, city or courtyard garden, but you do need a structure big enough to contain the plant, or it will get under your slates. Prune twice a year, and allow ample space for the root-run. Japanese wisteria Yae-kokuryu holds the RHS Award of Garden Merit. Site: ShelteredSoil: Any fertile, moist but well-drained soilPosition: Best in full sun; tolerates light, dappled shadeSeason of interest: Late spring and early summer in particularHardiness: Very hardyHeight:  26-40’ (8-12m) Spread: 8-13’ (2.5-4m) in 10-20 years