White Flowered Redbud
Cercis canadensis var. alba
Fabaceae · broadleaf deciduous tree · introduced
Last updated
Data Coverage 4 of 6 dimensions
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 3, 2026, Puget Sound stations range from 1070 to 1180.6 GDD₃₂. White Flowered Redbud has reached 'flower buds visible' (835 GDD₃₂) and is approaching 'first bloom', predicted around Apr 10.
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 3, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,181 | 'Flower buds visible' | 'First bloom' | 68 |
| Seattle / UW | 1,171 | 'Flower buds visible' | 'First bloom' | 78 |
| Kent / Auburn | 1,111 | 'Flower buds visible' | 'First bloom' | 138 |
| Olympia / Tumwater | 1,106 | 'Flower buds visible' | 'First bloom' | 143 |
| Bellingham / Whatcom | 1,101 | 'Flower buds visible' | 'First bloom' | 148 |
| Tacoma / Puyallup | 1,075 | 'Flower buds visible' | 'First bloom' | 174 |
| Sequim / Rain Shadow | 1,070 | 'Flower buds visible' | 'First bloom' | 179 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'Flower buds visible' BBCH '51' NOW | 835 | '' |
| ○ 'First bloom' BBCH '61' NEXT | 1249 | '' est. Apr 10 (forecast) |
| 'Bud break' BBCH '07' | 1313 | '' est. Apr 13 (forecast) |
| 'Leaf emergence' BBCH '11' | 1554 | '' est. Apr 25 (avg) |
| 'Fall color / leaf senescence' BBCH '93' | 1750 | '' est. May 5 (avg) |
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 3, 2026. Predicted dates use 16-day weather forecast through Apr 19, 2026, then climate normals.