Donald Wyman Crabapple

Beginning of flowering

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.

Donald Wyman is a proven crabapple performer over decades and a legitimate candidate for Puget Sound landscapes where space accommodates the 17-22 ft spread. The persistent bright red fruit extends ornamental value through winter and provides important late-season forage for cedar waxwings, robins, and overwintering thrushes — fruit hangs through January in mild Puget Sound winters and only drops after birds clear it. Genuine amber-gold fall color adds a third season of interest that many crabapples lack. The two regional caveats are real and worth flagging: (1) fire blight susceptibility — Missouri Botanical Garden, MSU, and JFS all note this; spring pruning is specifically contraindicated, so plan pruning windows for late winter (February in Puget Sound) before bud break and before warm humid bloom-period bacterial activity; (2) scab susceptibility is moderate in maritime PNW conditions despite better Michigan ratings — expect some defoliation in cool wet spring years. Bloom timing is mid-season, synchronizing nearly exactly with ‘Snowdrift’ and overlapping with mid-blooming fruiting apple cultivars like Gala and Honeycrisp. Donald Wyman is one of only two crabapples that Morton Arboretum recommends as a single-cultivar pollinizer choice for home orchards (the other being ‘Sargent’). The spread typically exceeds height, producing a broader rounded profile than upright cultivars like ‘Adirondack’ — important to factor into site planning. Combined with ‘Adirondack’ (late bloom), ‘Donald Wyman’ covers the early-to-mid bloom window for extended apple pollination.

— Chris Welch, ISA Certified Arborist

Plant Profile

Size & Form

Height
15-20 ft
Spread
17-22 ft (spread typically slightly exceeds height giving the cultivar a broader profile than upright cultivars like Adirondack)
Growth Rate
Medium (no source rates explicitly slow or fast; reaches 15-20 ft over ~20-25 years which is typical malus growth)
Size at 20 yr
15-20 ft
Lifespan
50-80 years typical for ornamental crabapples

Site Requirements

Light
Full sun (best flower production and disease resistance); tolerates light afternoon shade with reduced flowering and increased scab pressure
Soil Drainage
Well drained; adapts to a wide range of soil textures provided drainage is adequate; tolerates urban conditions
Soil pH
5.5-7.5 (slightly acidic to neutral); Missouri Botanical Garden notes optimum is 'medium moisture, well-drained, acidic loams
Water
Moderate
Drought Tolerance
Moderate; missouri botanical garden notes 'established trees have some drought tolerance'; supplemental watering during pnw summer drought benefits flower production
Hardiness
Zones 4–8

Ornamental Interest

Bloom Time
Late April to mid-May (Puget Sound); mid-season blooming, synchronous with Snowdrift
Fall Color
Amber-gold (genuine fall interest; one of the few crabapples with reliable fall color)
Origin
Cultivar from chance seedling discovered at the Arnold
Watch for this season

Bloom Infection Window

Active Conidial Spread

First Flight

Diseases: Regionally Documented (3)

Diseases: Other Associations (1)

Pests: Regionally Documented (4)

Phenological Calendar

As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Donald Wyman Crabapple has passed beginning of flowering (1143 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 Beginning of flowering
Kent / Auburn 2,665 Beginning of flowering
Seattle / UW 2,610 Beginning of flowering
Olympia / Tumwater 2,570 Beginning of flowering
Tacoma / Puyallup 2,535 Beginning of flowering
Bellingham / Whatcom 2,533 Beginning of flowering
Sequim / Rain Shadow 2,436 Beginning of flowering
View full calendar (2 stages)
Stage GDD32 Typical Window
Beginning of flowering BBCH 61 NOW 1143 Late April (Puget Sound); among the earlier crabapple bloom thresholds in the recommended set
Full bloom BBCH 65 1130 Late April to early May (Puget Sound)

Source: OSU phenology catalog (OSU: weather.cfaes.osu.edu) 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.