Donald Wyman Crabapple
Malus 'Donald Wyman'
Rosaceae · broadleaf deciduous tree · introduced
Last updated
Malus 'Donald Wyman' (Rosaceae) is a deciduous ornamental crabapple cultivar that forms a broad, rounded tree to about 20 feet tall and wide. Single white flowers open from pink buds in profusion in spring, followed by persistent glossy red fruit (about 3/8 inch) that holds through winter and feeds birds.
Donald Wyman performs best in full sun on well-drained soil. Bloom begins around 197 GDD (base 50 F) with full bloom near 251 GDD. It is widely considered one of the most disease-resistant crabapple cultivars and is valued for its four-season interest: spring flowers, summer foliage, persistent red fruit, and clean branching habit in winter.
Quick Facts
Phenological Calendar
As of April 19, 2026, Puget Sound stations range from 1342.9 to 1500.8 GDD₃₂. Donald Wyman Crabapple has passed beginning of flowering (1143 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 | Beginning of flowering | — | — |
| Seattle / UW | 1,465 | Beginning of flowering | — | — |
| Kent / Auburn | 1,441 | Beginning of flowering | — | — |
| Olympia / Tumwater | 1,415 | Beginning of flowering | — | — |
| Bellingham / Whatcom | 1,390 | Beginning of flowering | — | — |
| Tacoma / Puyallup | 1,381 | Beginning of flowering | — | — |
| Sequim / Rain Shadow | 1,343 | Beginning of flowering | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● Beginning of flowering BBCH 61 NOW | 1143 | — |
| Full bloom BBCH 65 | 1130 | — |
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.