Snow Crystal Crabapple

Full bloom

Malus 'JFS KW218MX'

Rosaceae · broadleaf deciduous tree · introduced

Last updated

Quick Facts

Height
15 ft (J. Frank Schmidt Crabapple Chart)
Spread
12 ft (J. Frank Schmidt Crabapple Chart)
Growth Rate
Medium
Light
Full Sun
Soil
Well Drained
Water
Moderate
Hardiness
Zone Zones 4–8 (J. Frank Schmidt Crabapple Chart)
Bloom Time
Late April to mid-May (Puget Sound); mid-season blooming
Fall Color
Yellow-bronze
Origin
Cultivar; JFS proprietary breeding (specific parentage not
Watch for this season

Bloom Infection Window

Spring Emergence / Primary Infection

Codling mothModerate

Pupation

Phenological Calendar

As of May 13, 2026, Puget Sound stations range from 1906.2 to 2098.2 GDD₃₂. Snow Crystal Crabapple has passed full bloom (1305 GDD₃₂).

Regional Season Tracker

GDD₃₂ accumulation across 7 Puget Sound stations · as of May 13, 2026
Station GDD₃₂ Current Stage Next To Go
Issaquah / East King 2,098 Full bloom
Kent / Auburn 2,089 Full bloom
Seattle / UW 2,063 Full bloom
Olympia / Tumwater 2,025 Full bloom
Tacoma / Puyallup 1,993 Full bloom
Bellingham / Whatcom 1,972 Full bloom
Sequim / Rain Shadow 1,906 Full bloom
Stage GDD32 Typical Window
Beginning of flowering BBCH 61 990 Late April (Puget Sound)
Full bloom BBCH 65 NOW 1305 Late April to early May (Puget Sound)

Source: HortGuide regional interpretation based on Morton Arboretum bloom timing About GDD₃₂ →

Season tracker for Kent / Auburn as of May 13, 2026. Predicted dates use 16-day weather forecast through May 29, 2026, then climate normals.

Diseases: Regionally Documented (3)

Diseases: Other Associations (1)

Pests: Regionally Documented (3)

Snow Crystal® is a newer J. Frank Schmidt introduction filling the compact pyramidal niche — 15 × 12 ft mature size with a distinctly pyramidal rather than rounded form distinguishes it from typical crabapple silhouettes. For PNW landscapes wanting compact upright- pyramidal form with white flowers and tiny persistent golden fruit, Snow Crystal is the modern choice. Excellent disease resistance across all four major diseases per JFS supports reliable performance in maritime PNW conditions. Cross-reference: 'Red Jewel™' (15 × 12 ft upright pyramidal with white flowers and red fruit — the alternate for red rather than gold fruit color); 'Adirondack' (narrower 10 ft spread, white flowers, red fruit, similar disease resistance). Sourcing note: as a recent JFS introduction, Snow Crystal is most readily available through wholesale and design-grade nurseries. Cross-reference with 'Red Jewel™' (similar size and form, red fruit alternative) and 'Adirondack' (narrower form alternative).

— Chris Welch, ISA Certified Arborist

Data Maturity
Structured Multiple sources. Expert review underway.