White ash (Fraxinus americana)

Fruit and Seed

Propagation Method

Seed collection: White 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: White ash has physiological dormancy.

Seed germination: Seeds must be warm (~75F) stratified for 30 days to allow the small embryo to grow inside the seed. This is followed by moist chilling stratification for 60 days to satisfy physiological dormancy. 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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