Pagoda Dogwood
'Full bloom'Cornus alternifolia
Cornaceae · broadleaf deciduous tree · introduced
Last updated
Plant Profile
Size & Form
Height
15–25 ft
Spread
20-32 ft
Growth Rate
Moderate
Size at 20 yr
25 ft
Lifespan
Moderate
Site Requirements
Light
Part Shade
Soil Drainage
Well Drained
Soil pH
4.8-7.3
Water
Moderate
Drought Tolerance
Low
Hardiness
Zones 3a–8b
Ornamental Interest
Bloom Time
May to June
Fall Color
Red
Origin
from New Brunswick east to Minnesota and south to Georgia
Watch for this season
Powdery MildewHigh
Active Conidial Spread
Oystershell scaleHigh
Crawler Emergence
Anthracnose (Shade Trees)Moderate
Active Infection & Secondary Spread
Armillaria Root RotModerate
Active Below-ground Growth
+ 2 more — see full disease and pest lists below
Diseases: Regionally Documented (7)
Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Collar Rot Armillaria spp. — primarily A Armillaria Root Rot Symptom category — not a single disease Branch Canker Symptom category — not a single disease Leaf Spot Symptom category — not a single disease Root Rot
Pests: Regionally Documented (6)
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Pagoda Dogwood has passed 'full bloom' (1490 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 | 'Full bloom' | — | — |
| Kent / Auburn | 2,665 | 'Full bloom' | — | — |
| Seattle / UW | 2,610 | 'Full bloom' | — | — |
| Olympia / Tumwater | 2,570 | 'Full bloom' | — | — |
| Tacoma / Puyallup | 2,535 | 'Full bloom' | — | — |
| Bellingham / Whatcom | 2,533 | 'Full bloom' | — | — |
| Sequim / Rain Shadow | 2,436 | 'Full bloom' | — | — |
View full calendar (2 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'First bloom' BBCH '61' | 1270 | '' |
| ● 'Full bloom' BBCH '65' NOW | 1490 | '' |
Range: 937–1136 GDD₃₂
(6yr)
Source: 'Master catalog (OSU), 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 Structured Multiple sources. Expert review underway.