White Japanese Wisteria A  fast-growing woody, deciduous vine with large pinnate leaves, Wisteria needs sturdy support in a sheltered south or west facing position. ‘Longissima Alba’ bears long drooping racemes of pure white flowers that can reach almost 2 ft in length. Prune regularly to keep this vigorous climber in its place and encourage flowering. Position: Full sun to partial shade and any aspectSoils:  Moist, well-drainedHardiness: Mostly hardy in IrelandSize: 30 ft high - 20 ft spread