Accolade Elm (Ulmus davidiana var. japonica 'Morton')Accolade Elm is a large deciduous shade tree valued for its graceful vase-shaped habit, glossy green foliage, and strong resistance to several common elm problems. Its arching branch structure gives the landscape a classic American elm look while offering improved dependability for modern planting sites. This fast-growing tree is well suited for lawns, streetscapes, parks, large residential properties, and open spaces where broad shade and strong structure are needed. With full sun, well-drained soil, and room to mature, Accolade Elm brings height, canopy, and long-term character to the landscape.Distinctive FeaturesAccolade Elm develops a broad vase-shaped canopy with upright arching branches that create an elegant, high-branching shade tree form. The foliage is glossy dark green through the growing season and typically turns yellow in fall before leaf drop. Small inconspicuous flowers appear in spring, followed by flat winged samaras that are typical of elms. This selection is especially valued for its excellent resistance to Dutch elm disease and useful resistance to elm leaf beetle and elm leaf miner, making it a stronger landscape option than many older elm selections.Growing Conditions Sun: Grows best in full sun, where it develops strong branching, dense foliage, and the best overall canopy form. Soil: Adapts to a range of well-drained soils, including average urban soils, clay loam, and moderately dry sites once established. Water: Water regularly during establishment, then provide supplemental water during extended drought to support healthy growth and canopy density. USDA Zones: Hardy in USDA Zones 4 to 9. Mature Size: Typically reaches about 50 to 60 feet tall and 25 to 40 feet wide with age. Habit: Forms a medium to large deciduous shade tree with an upright vase-shaped habit and arching limbs. Ideal Uses Focal Point: Use as a large shade tree focal point in open lawns, parks, wide front yards, or spacious landscapes where its vase-shaped canopy can develop fully. Street Tree: Plant along parkways, broad streetscapes, and municipal plantings where a tough, upright shade tree is needed. Shade Tree: Use in large residential or commercial landscapes to provide summer shade, canopy structure, and long-term landscape presence. Urban Landscape: Plant in suitable urban settings where its adaptability, disease resistance, and upright branching make it useful for managed landscapes. Open Space Planting: Use in parks, campuses, large lawns, and public landscapes where a durable elm can provide scale and seasonal interest. Low Maintenance Care Watering: Water deeply during the first few growing seasons to establish a strong root system, then water during prolonged dry periods as needed. Mulching: Apply a wide mulch ring to conserve moisture, moderate soil temperature, and reduce mower damage near the trunk. Pruning: Prune young trees to develop strong branch spacing and a stable central framework while removing crossing, damaged, or poorly attached branches. Fertilizing: Fertilize only when needed based on soil conditions, since established elms often perform well in average soils. Spacing: Provide plenty of room away from buildings, overhead wires, and narrow beds so the mature canopy can develop properly. Monitoring: Watch for common elm insects, cankers, leaf spots, and stress-related issues, especially during drought or poor site conditions. Why Choose Accolade Elm? Classic Elm Form: Develops a graceful vase-shaped canopy with arching branches that recalls the look of traditional American elms. Disease Resistance: Offers excellent resistance to Dutch elm disease along with useful resistance to elm leaf beetle and elm leaf miner. Fast Growth: Establishes and grows quickly when planted in a suitable site with enough room, light, and moisture. Urban Adaptability: Handles a range of soil types and landscape conditions better than many less adaptable shade trees. Strong Shade Value: Provides broad summer canopy, glossy foliage, yellow fall color, and long-term structure for large landscapes. Accolade Elm is an excellent choice for gardeners, property managers, and landscape professionals who want the graceful look of a classic elm with improved modern performance. Its vase-shaped habit, glossy foliage, yellow fall color, fast growth, and disease resistance make it a dependable shade tree for spacious residential landscapes, streetscapes, parks, and open public spaces.
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