Summit Ash

Summit ash is an upright green ash selection with a strong central leader and a pyramidal to rounded-pyramidal crown. Its dark green leaves turn yellow-gold in fall, and its cultivar-specific dimensions are about 45 feet tall by 25 feet wide. ## Landscape use Give the canopy room to develop and keep overhead utilities, pavement, and buildings in mind when selecting a site. The University of Illinois woody plant database describes ‘Summit’ as a Minnesota introduction with a straight central leader and a more symmetrical form than the species. ## Seasonal character This is a deciduous tree, with its clearest ornamental display arriving when the foliage turns yellow in autumn. The [University of Illinois profile](https://woodyplants.nres.uiuc.edu/plant/frapesu) lists USDA hardiness Zone 3b and the 45-by-25-foot mature size. ## Maintenance Inspect the crown periodically for dead or damaged branches and prune while the tree is dormant when structural work is needed. Ash trees can face serious pest and disease pressure in some regions, so consult local extension guidance before planting.