Step-by-Step Growing Guide
Wisteria is one of the most spectacular garden climbers but requires patient management. Plant in well-draining, moderately fertile soil with a pH of 6.0–7.0. Overly rich soil produces excessive vegetative growth at the expense of flowers. A sheltered, south or southwest-facing position with full sun is ideal for flowering. Provide an extremely robust support structure — a mature wisteria exerts enormous weight and force; masonry walls with heavy wire systems or purpose-built wooden pergolas are necessary. Plant in late autumn or early spring. Water well during the first two seasons to establish; once established, wisteria is moderately drought-tolerant. Restrict nitrogen fertilisation; high phosphorus and potassium promotes flowering. Prune twice yearly without fail: in August, cut all new whippy side-shoots back to 5 leaves; in January–February, cut the same shoots again to 2–3 buds. This double pruning regime is the key to establishing reliable annual flowering.