Flowering Quince
Chaenomeles speciosa
Rosaceae · broadleaf deciduous shrub · introduced
Last updated
Data Coverage 3 of 6 dimensions
Quick Facts
Height
6–10 ft
Light
Part Shade
Hardiness
Zone Zones 4a–8b
Bloom Time
March to April
Origin
China
Phenological Calendar
As of April 19, 2026, Puget Sound stations range from 1342.9 to 1500.8 GDD₃₂. Flowering Quince has passed 'full bloom' (870 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 19, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,501 | 'Full bloom' | — | — |
| Seattle / UW | 1,465 | 'Full bloom' | — | — |
| Kent / Auburn | 1,441 | 'Full bloom' | — | — |
| Olympia / Tumwater | 1,415 | 'Full bloom' | — | — |
| Bellingham / Whatcom | 1,390 | 'Full bloom' | — | — |
| Tacoma / Puyallup | 1,381 | 'Full bloom' | — | — |
| Sequim / Rain Shadow | 1,343 | 'Full bloom' | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'First bloom' BBCH '61' | 703 | '' |
| ● 'Full bloom' BBCH '65' NOW | 870 | '' |
Range: 462–645 GDD₃₂
(6yr)
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 Apr 19, 2026. Predicted dates use 16-day weather forecast through May 5, 2026, then climate normals.