Getting Wisteria to Bloom: Extension Service Contact for Kitsap County, WA

A gardener in Kitsap County, WA has a vigorous 3-4 year old wisteria that never blooms. Expert provided contact info for Washington State University Extension.

Common Reasons for No Blooms

• Excess nitrogen fertilizer: Promotes leaves, not flowers. Stop fertilizing.
• Improper pruning: Prune only after bloom period (late summer). Blooms on new growth.
• Too much vigor: Root prune (spade cut around drip line) to shock into flowering.
• Seed-grown vs. grafted: Seedlings can take 7-15 years to bloom. Grafted/named cultivars bloom sooner.
• Insufficient sun: Needs full sun (6+ hours).

Local Expert Contact

WSU Kitsap County Extension
614 Division St, MS-16, Port Orchard, WA 98366
Physical: 715 Sidney Ave, Port Orchard
Phone: (360) 337-7157
Hours: Mon-Fri 9-11:30am, 12:30-4:30pm

They can diagnose site-specific issues and recommend proven cultivars for your area.