Manchurian Ash Tree

Manchurian ash is a large, deciduous tree with a dense rounded crown and bold compound leaves. It comes from northern Asia and is planted for shade, strong structure, and yellow autumn foliage. ## Landscape Use Give this species ample room for a mature canopy. The [Dawes Arboretum profile](https://dawesarb.arboretumexplorer.org/taxon-15876.aspx) describes an upright oval tree, typically 45–50 feet tall and 35 feet wide; the [University of Saskatchewan profile](https://gardening.usask.ca/articles-and-lists/articles-plant-descriptions/trees/manchurian-ash.php) gives an average of 50–60 feet tall by 30–40 feet wide. Individual trees vary with site and climate. ## Foliage and Seasonal Interest Compound leaves form a dense canopy that casts deep shade. Foliage turns yellow or yellow-gold in fall. Greenish flowers appear in spring before the leaves, and fruit may follow on female trees. ## Growing Conditions Plant in full sun and moist, well-drained soil. The species tolerates a range of soil conditions, but a well-sited tree benefits from steady moisture while it establishes. Dawes lists USDA zone 4; regional sources report wider cold adaptation, so match hardiness advice to local conditions. ## Maintenance Protect young trees from late spring frost in colder sites. Prune selectively to maintain a sound branch structure, and account for the eventual crown before planting near paving, buildings, or overhead utilities.