White Flowered Redbud
Cercis canadensis var. alba
Fabaceae · broadleaf deciduous tree · introduced
Last updated
Data Maturity Baseline
This profile contains verified botanical data. Regional field notes and expert review are in progress.
Quick Facts
Height
12 ft
Growth Rate
Fast
Light
Part Shade
Soil
Moist
Water
Low
Hardiness
Zone Zones 6b–9b
Bloom Time
April
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. White Flowered Redbud has reached 'bud break' (1313 GDD₃₂) and is approaching 'leaf emergence', predicted around Apr 24.
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 23, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,593 | 'Leaf emergence' | 'Fall color / leaf senescence' | 157 |
| Seattle / UW | 1,554 | 'Bud break' | 'Leaf emergence' | 0 |
| Kent / Auburn | 1,537 | 'Bud break' | 'Leaf emergence' | 17 |
| Olympia / Tumwater | 1,505 | 'Bud break' | 'Leaf emergence' | 50 |
| Bellingham / Whatcom | 1,483 | 'Bud break' | 'Leaf emergence' | 71 |
| Tacoma / Puyallup | 1,472 | 'Bud break' | 'Leaf emergence' | 82 |
| Sequim / Rain Shadow | 1,434 | 'Bud break' | 'Leaf emergence' | 120 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Flower buds visible' BBCH '51' | 835 | '' |
| 'First bloom' BBCH '61' | 1249 | '' |
| ● 'Bud break' BBCH '07' NOW | 1313 | '' |
| ○ 'Leaf emergence' BBCH '11' NEXT | 1554 | '' est. Apr 24 (forecast) |
| 'Fall color / leaf senescence' BBCH '93' | 1750 | '' est. May 2 (forecast) |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? GDD₃₂ thresholds from USA National Phenology Network citizen science observations (WA+OR). Season tracker for Kent / Auburn as of Apr 23, 2026. Predicted dates use 16-day weather forecast through May 9, 2026, then climate normals.