Green Ash Tree Seeds

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About & Species

Green Ash
(Fraxinus pennsylvanica)

The Green Ash tree is one of the most popular Ash trees. The Green Ash tree is a fast grower, averaging 2 to 3 feet per year over a 10-year period. The Green Ash tree reaches heights of 50 to 60 feet. Green Ash trees are best planted on lawns, streets, commercial areas, parks, golf courses and landscapes. This tree is suitable for almost any area, as it adapts to almost any environment.  

Soil Type: Grows almost anywhere. Requires full-sun. Found native in moist bottom lands or along stream banks.

Zones: 2 to 9

Germination Range: 60-80%

Stratification Requirement: Seed requires 60 days warm stratification followed by 120 days cold moist stratification.

Indoor Planting: If your seeds require stratification or scarification – do the recommended pretreatment before planting indoors. Planting Instructions: Fill a container with seed starting mix to about ½ inch from the top. Place your seeds 1 inch to 1 ½ inches below the soil surface. Gently water your seeds to keep moist, not soaking wet. Heat & humidity is critical for germination. Germination may occur in 1 week or as long as 3 months (depending on the species). Place the seed container on a heat mat under growing light(s). Keep your growing lights on 14 hours per day. Keep your heat mat on 24 hours per day. Once your seeds germinate, move each seed into its own container under the growing lights and on the heat mat. Keep your seedlings indoors for 2-3 months before transplanting outdoors in the spring (May to June).

Outdoor Planting: If your seeds do not require stratification: the best time to plant tree and shrub seeds outdoors is after the last frost in your area (spring). In the Northern states – the best time to plant seeds outdoors is from May to June. If your seeds require pretreatment: you should plant your seeds outdoors before the ground freezes in your area (late September to early November). Your seeds will naturally stratify during the cold winter. Germination usually occurs in May or during the spring season.