Weigela
Weigela florida
Caprifoliaceae · broadleaf deciduous shrub · introduced
Last updated
Weigela is a deciduous broadleaf shrub from Japan reaching 9-12 ft with erect form and medium growth. It produces funnel-shaped flowers in lavender, pink, red, or white from April to June, blooming on previous season's wood.
Weigela is hardy in zones 4a-8b and thrives in full sun to part shade with moist, adaptable soil (pH 4.5-8.5). Prune immediately after flowering through early summer. It attracts hummingbirds and tolerates clay soil with low-maintenance requirements.
Quick Facts
Phenological Calendar
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Mar 22, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Seattle / UW | 1,013 | Pre-season | Beginning of flowering | 409 |
| Issaquah / East King | 1,006 | Pre-season | Beginning of flowering | 416 |
| Olympia / Tumwater | 952 | Pre-season | Beginning of flowering | 470 |
| Bellingham / Whatcom | 948 | Pre-season | Beginning of flowering | 474 |
| Kent / Auburn | 942 | Pre-season | Beginning of flowering | 480 |
| Sequim / Rain Shadow | 924 | Pre-season | Beginning of flowering | 498 |
| Tacoma / Puyallup | 921 | Pre-season | Beginning of flowering | 501 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ○ Beginning of flowering BBCH 61 NEXT | 1422 | — est. Apr 21 (avg) |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? Source GDD₅₀ thresholds from Herms 2004 (OSU, Secrest Arboretum, Ohio) and UMD IPMnet (Gill & Klick, mid-Atlantic), converted to GDD₃₂ via Kent bloom-date mapping. Season tracker for Kent / Auburn as of Mar 22, 2026. Predicted dates use 16-day weather forecast through Apr 7, 2026, then climate normals.