Never Stops Blooming. Double-powder blue flowers arise in late spring, early summer and again in late summer. It is a popular Japanese Wisteria with fragrant, powder-blue flowers in racemes up to 6 1/2 inches long. It blooms heavily and frequently, producing a second, smaller display in late summer. These potted plants are cutting-grown from flowering wood to ensure bloom at an early age. A rapid, vigorous grower to 30 feet, perfect for creating a spectacular show on a pergola or against a wall. These tough, drought-resistant vines require minimal care and don't even need to be fertilized. Plant in a sunny location near a strong support. Prune after flowering and again in late winter if you wish to control its size. Wisteria are easy to train into standard or "tree" form. Just attach the trunk of the plant to a sturdy 5- or 6-foot stake and trim all but the topmost branches. Prune as needed to keep the vine in bounds. The goal is to achieve a bushy top growth that is supported by the vine's trunk. Remove the stake once the standard is established.
Fragrant, powder-blue flowers in racemes up to 6 1/2 inches long