Donald Wyman Crabapple
Malus Donald Wyman
Rosaceae · [VERIFY] · 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
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Mar 30, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,116 | Pre-season | Full bloom | 14 |
| Seattle / UW | 1,112 | Pre-season | Full bloom | 18 |
| Olympia / Tumwater | 1,049 | Pre-season | Full bloom | 82 |
| Kent / Auburn | 1,048 | Pre-season | Full bloom | 82 |
| Bellingham / Whatcom | 1,041 | Pre-season | Full bloom | 89 |
| Tacoma / Puyallup | 1,017 | Pre-season | Full bloom | 113 |
| Sequim / Rain Shadow | 1,012 | Pre-season | Full bloom | 118 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ○ Beginning of flowering BBCH 61 NEXT | 1143 | — est. Apr 5 (forecast) |
| Full bloom BBCH 65 | 1130 | — est. Apr 5 (forecast) |
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 Mar 30, 2026. Predicted dates use 16-day weather forecast through Apr 15, 2026, then climate normals.