Wisteria brachybotrys 'Okayama'
The 'Silky Wisteria' is a beautiful early flowering variety with initially bronze foliage in spring that opens to reveal tight purple buds and pale-lilac, heavily scented, pea-like flowers. Its downy foliage gives it its common name and it is ideal for walls or large pergolas. This variety has been awarded the Award of Garden Merit by the RHS.
Caution: This plant is harmful if ingested.
Flowering time: May - June
Height: 9m
Frequently Asked Questions
When is the best time to plant wisteria in the UK?
Autumn or spring are both suitable, as long as the soil isn’t frozen or waterlogged. Planting in autumn often helps roots settle before the next growing season.
How often should I prune wisteria for reliable flowering?
Most gardeners prune twice: once after flowering in summer, then again in late summer to keep shoots tidy and encourage flower buds for next year. Regular pruning also helps control spread and keeps it manageable on walls and trellis supports.
Why isn’t my wisteria flowering yet?
Common causes include too much shade, over-feeding, or the plant still getting established, especially in its early years. Also check whether it’s grafted (often flowers sooner) or grown from seed (can take much longer to bloom).
Will frost damage wisteria in winter?
Wisteria is generally hardy, but late frosts can sometimes nip young shoots or buds in early spring. A sheltered position and avoiding overly early soft growth (from high feeding) helps reduce risk.