Mountain ash is a small to medium ornamental tree valued for its feathery compound leaves, spring flowers, and bright clusters of red or orange berries that persist into fall and winter. The airy foliage creates a light, refined canopy that works well in residential landscapes and smaller yards. In spring, flat clusters of white flowers appear, followed by showy berries that attract birds. Fall color ranges from yellow to orange-red, adding additional seasonal interest. Its moderate size and decorative fruit make it a popular accent tree.