Rock Elm
Deciduous tree reaching 15-25 m tall with a vase-shaped crown. Features doubly serrate, asymmetrical leaves and distinctive corky wings on branches. Produces small, winged seeds. Prefers moist, well-drained soils and full sun to partial shade. More resistant to Dutch elm disease than American elm. Provides food and habitat for wildlife. Suitable for large landscapes and urban forestry. Native to central and eastern North America.
Plant Details
Bloom Colour: Green (inconspicuous)
Bloom Time: Early Spring
Sun Requirements: Sun to Part-Shade
Moisture: Moist-Drained
Phenology: Leaves emerge mid-May. Inconspicuous flowers appear before leaves in April. Winged seeds mature May-June. Yellow fall color develops October.
Wildlife Value: Seeds eaten by birds and small mammals; hosts numerous butterfly species; provides nesting sites for birds
Habit Over Time: Forms a medium to large tree with a vase-shaped crown and ascending branches. The canopy provides moderate shade but allows enough light penetration for understory planting. While it may produce some root suckers, especially when stressed, it typically maintains a single-trunk form. Branch structure provides good winter interest.
Height: Tall (50-80 feet)