Tschonoski Crabapple

Malus tschonoskii is the specialty fall-color crabapple — the only common crabapple in commerce with reliably outstanding autumn color in maritime Puget Sound conditions. Where most crabapples produce only modest yellow-bronze fall foliage (or none at all), Tschonoskii reliably turns brilliant yellow, orange, scarlet, and purple even in the cool wet PNW autumns where fall color is typically unreliable. J. Frank Schmidt: "fall color outshines that of all other crabapples." Combined with the distinctive narrow conical-columnar habit (25-28 ft tall × only 14 ft wide), the species fills a design niche no other crabapple occupies — vertical accent with multi-season interest culminating in dramatic fall display. Use Tschonoskii where (1) fall color is a primary design goal, OR (2) a narrow columnar tree is required (sidewalk planting strips, narrow yards, screen plantings). The fire-blight susceptibility (rated Fair by JFS) is the regional caveat — warm humid May bloom periods that produce blight pressure in maritime PNW will eventually affect this species, so plant it where blight inoculum pressure is low and avoid spring pruning entirely. Spring flowers are moderate rather than profuse — this is a fall color tree, not a spring bloom tree. The silvery downy spring foliage is itself a subtle ornamental feature that distinguishes Tschonoskii from typical glossy-green crabapples. Sourcing note: M. tschonoskii is less widely available than ornamental cultivars; specialty native-plant and design-grade nurseries are the best regional sources (Big Trees Nursery in Snohomish, Cornell Farm in Portland).

— Chris Welch, ISA Certified Arborist