About
Fraxinus quadrangulata, the blue ash, is a medium-sized, deciduous tree from central North America distinctive for its four-angled, square-sectioned young shoots � unique among the ashes. It produces pinnate leaves turning yellow in autumn and winged fruits. The inner bark was historically used to produce blue dye, giving rise to its common name.
About the genus
Fraxinus, the ash trees, are medium-sized to large, mostly deciduous trees with attractive, pinnate leaves, sometimes conspicuous flowers, autumn colour, and distinctive winged fruits (keys). Widely grown as landscape, street and ornamental trees in temperate gardens.
Plant details
Suggested usesSpecimen planting, gardens, parks.
Care notes
CultivationPlant in well-drained soil. Stake when young.
PruningPrune to shape in late winter or after flowering.
PropagationPropagate by division, cuttings, or seed as appropriate.
Pest resistanceGenerally pest-free. Monitor for common garden pests.
Disease resistanceGenerally disease-resistant. Ensure good air circulation.