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    Green Ash Tree

    Green Ash Tree

    $45.00 - $65.00
    $65.00
    $45.00 - $65.00
    $65.00
    Green Ash Tree (Fraxinus pennsylvanica) Growing Guide
    • Best Growing Environment: Green Ash is a highly adaptable native North American deciduous tree that excels in moist bottomlands, floodplains, stream banks, urban street plantings, parks, windbreaks, and reclamation sites. It tolerates a very wide range of soil types including clay, loam, sand, silt, rocky, and alkaline soils. Once established, it handles drought, occasional flooding, wind, salt spray, air pollution, and compacted urban soils well. It performs best with consistent moisture but adapts to drier sites, making it suitable for large landscapes across much of the central and eastern United States and Canada. Its fast growth and toughness made it popular for shade and screening, though emerald ash borer has greatly limited its use in many areas.
    • Botanical Name: Fraxinus pennsylvanica. It belongs to the Oleaceae (olive) family.
    • Common Names: Green Ash, Red Ash, Swamp Ash, Water Ash.
    • Average Height and Diameter: At maturity, it typically reaches 50–70 feet tall, occasionally up to 120 feet in ideal southern sites, with a canopy spread or diameter of 35–50 feet (commonly around 40 feet). Trunk diameter at breast height often reaches 18–30 inches. Young trees have a pyramidal shape that matures into a rounded or somewhat irregular crown.
    • Growth Rate: Fast-growing, especially in youth. It can add 1–2 feet or more in height per year under favorable conditions and often reaches 45–55 feet within 20 years on good sites. Trees generally mature relatively quickly with a typical lifespan of 70+ years when healthy.
    • Sun Requirements: Full sun is preferred, with at least 6 hours of direct sunlight daily for best growth, density, and overall vigor. It can tolerate light shade or partial sun but tends to grow less vigorously and with a more open form in heavier shade.
    • Cold Hardiness: Extremely cold-hardy and one of the toughest ash species. It performs reliably in a broad range of climates and handles severe winter temperatures and temperature swings very well.
    • Water Requirements: Prefers consistently moist soils and tolerates periodic flooding or wet conditions. During the first 2–3 years after planting, provide regular deep watering to establish a strong root system. Once established, it becomes moderately drought-tolerant but benefits from supplemental water during extended dry spells to reduce stress. Avoid prolonged standing water in poorly drained locations to prevent root rot.
    • Detailed Fertilizing Guide: Green Ash is generally low-maintenance and rarely needs fertilizer in average or fertile soils. For young trees or those showing slow growth or chlorotic (pale) foliage, apply a balanced slow-release granular fertilizer such as 10-10-10 in early spring around the drip line at the manufacturer’s recommended rate. A soil test is highly recommended to determine actual needs, particularly for nitrogen on poor sites. Avoid over-fertilizing mature trees, as excess nitrogen can encourage weak, succulent growth that is more prone to pests and storm damage.
    • Planting Guide: Plant in full sun in a hole twice as wide as the root ball but no deeper than the root collar. Green Ash transplants well, preferably in spring or fall. Gently loosen any circling roots, backfill with native soil (heavy amendments are usually unnecessary), and water thoroughly to settle the soil. Apply a 2–3 inch layer of mulch over the root zone, keeping it away from the trunk to prevent rot. Space trees at least 40 feet apart for specimen plantings or closer for windbreaks and screens. Prune young trees to establish strong branch structure with wide crotch angles. Female trees produce abundant samaras (winged seeds) that can be messy, so male cultivars are often preferred in landscapes. Due to emerald ash borer, consult local extension services for treatment protocols or resistant alternatives before planting.
    • USDA Zone: Hardy in USDA Zones 3–9b, with some tolerance extending into Zone 2 in protected sites. This makes it suitable for northern climates while still adapting to warmer zones when moisture is adequate.