Green ash (Fraxinus pennsylvanica)



Propagation Method

Seed collection: Green ash fruit is a samara. They appear as clusters of fruit near the ends of the branches. Harvest the fruit in the fall into winter after the fruit turns from green to tan. The wing of the samara does not need to be removed from the seed before sowing. They can be stored dry for long periods in air tight containers in the refrigerator.

Seed dormancy: Green ash has physiological dormancy.

Seed germination: Seeds should be exposed to moist chilling stratification at about 40F for 60 days to satisfy physiological dormancy. Seed germination may be improved by a brief period of warm (~75F) stratification for 30 days prior to moist chilling stratification. Following stratification, sow seeds in a nursery container to produce a seedling or sow them in a plastic container in the classroom to observe germination.

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