Arnold Promise Witch Hazel Shrub

‘Arnold Promise’ witch hazel is a deciduous hybrid shrub with fragrant, bright yellow flowers that open on bare branches in late winter. Its long, curling petals and upright, vase-shaped form distinguish this named selection; yellow and orange autumn foliage extends its seasonal interest ([Arnold Arboretum](https://arboretum.harvard.edu/plant-bios/arnold-promise-witch-hazel-2/); [Oregon State University](https://landscapeplants.oregonstate.edu/plants/hamamelis-intermedia-arnold-promise)). ## Landscape Use Allow this large shrub or small tree to develop as a specimen, or use it at the back of a broad shrub border or woodland garden. The existing 15–20-foot height and spread labels and 5 m dimensions are consistent with U.S. horticultural descriptions of this cultivar reaching about 15–20 feet. ## Growing Conditions Plant in full sun or partial shade in moist, well-drained soil. Oregon State University identifies the cultivar as hardy to USDA zone 5, and the Arnold Arboretum describes its flowers blooming on bare branches from mid-February through March in Boston. Winter timing shifts with local climate; site the shrub where the flowers can be noticed during the dormant season. ## Maintenance Water during establishment and prolonged dry spells, and maintain a light mulch over the root area. After flowering, prune only as needed to remove dead, crossing, or misplaced branches. Keep heavier shaping to a minimum because the flowers develop on older wood and are part of the plant’s winter display.