Prairie Rose Crabapple

Full bloom

Malus ioensis 'Prairie Rose'

Rosaceae · broadleaf deciduous tree · introduced

Last updated

Quick Facts

Height
20 ft (J. Frank Schmidt Crabapple Chart)
Spread
18 ft (J. Frank Schmidt Crabapple Chart)
Growth Rate
Medium (typical malus growth rate)
Light
Full Sun (Best Flower Production And Disease Resistance)
Soil
Well Drained
Water
Moderate
Hardiness
Zone Zones 4–8 (J. Frank Schmidt Crabapple Chart; M. ioensis native distribution supports broad cold tolerance)
Bloom Time
Late April to mid-May (Puget Sound); mid-season blooming
Fall Color
Yellow-bronze; not a primary ornamental feature
Origin
Cultivar selection of Malus ioensis (Prairie Crabapple,
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. Prairie Rose 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)

Prairie Rose is the only common crabapple with truly rosebud-like double pink flowers — the flower form alone justifies the cultivar's place in PNW commerce. Combined with functional fruitlessness (no sidewalk debris, no bird-stained pavement, no fall fruit cleanup), Prairie Rose suits patio, walkway, courtyard, and entry plantings where fruit drop is unacceptable but a unique floral display is desired. The Midwest-native M. ioensis parentage provides better drought tolerance and clay-soil performance than typical Asian-derived ornamental crabapples — useful in PNW landscapes with heavy Green River valley clay or unirrigated parkway sites. The cedar-apple rust susceptibility (rated Poor by JFS) is the cultivar's main caveat elsewhere, but maritime PNW's limited Juniperus virginiana presence substantially reduces real-world rust pressure regionally — the rust caveat matters more in continental climates than in coastal Washington/Oregon. Where Eastern red cedar IS present in the landscape (introduced ornamentals or windbreak plantings), break the rust cycle by relocation. For PNW homeowners or designers wanting a fruitless flowering crabapple with maximum floral impact, 'Prairie Rose' is the standout choice alongside 'Spring Snow' (single white) and 'Marilee®' (double white). Cross-reference: 'Spring Snow' offers no fruit and white single flowers; 'Marilee®' offers no fruit and white double flowers; 'Prairie Rose' offers no fruit and pink double flowers — pick by color preference.

— Chris Welch, ISA Certified Arborist

Data Maturity
Structured Multiple sources. Expert review underway.