Shadblow
Amelanchier canadensis
Rosaceae · broadleaf deciduous shrub · introduced
Last updated
Plant Profile
Size & Form
Height
15 ft
Spread
9 ft
Growth Rate
Moderate
Size at 20 yr
20 ft
Lifespan
Long-lived
Site Requirements
Light
Sun to Part Shade
Soil Drainage
Wet Tolerant
Soil pH
5.5-7.5
Water
Moderate
Drought Tolerance
Low
Hardiness
Zones 3a–8b
Ornamental Interest
Bloom Time
April to May
Fall Color
Gold, orange, red, yellow
Origin
from Maine to Georgia, Louisiana and west to Iowa and
Watch for this season
RustHigh
Uredinial Stage (Summer)
Diseases: Regionally Documented (1)
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Shadblow has passed 'first bloom' (798 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Jun 3, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,673 | 'First bloom' | — | — |
| Kent / Auburn | 2,665 | 'First bloom' | — | — |
| Seattle / UW | 2,610 | 'First bloom' | — | — |
| Olympia / Tumwater | 2,570 | 'First bloom' | — | — |
| Tacoma / Puyallup | 2,535 | 'First bloom' | — | — |
| Bellingham / Whatcom | 2,533 | 'First bloom' | — | — |
| Sequim / Rain Shadow | 2,436 | 'First bloom' | — | — |
View full calendar (1 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'First bloom' BBCH '61' NOW | 798 | '' |
Range: 550–706 GDD₃₂
(6yr)
Source: 'Master catalog (UMD), converted GDD50->GDD32 via Kent bloom-date mapping' About GDD₃₂ →
Season tracker for Kent / Auburn as of Jun 3, 2026. Predicted dates use 16-day weather forecast through Jun 19, 2026, then climate normals.
Data Maturity Baseline Extension data. Expert review underway.