It is important to use fresh seed as the seed loses viability quickly in storage.  It should be sown in spring. Seed can first be cleaned in one of two ways;

1. The wings of the four-winged fruit can be cut off close to the fruit with a pair of scissors and then sown directly
2. The winged fruits are openened manually by pulling on two opposing wings and peeling open the fruit to reveal the winkled seed.

The latter method results in quicker and more even germination, but the chance of damaging the seed is greater. Cleaned seeds can be soaked in cold water for approximately 10-12 hours; seeds can then be sowed in a seedling trays filled with a well-drained, sandy, loam soil and compost mixture and covered lightly with a thin layer of sand. Seeds can also be pressed into the seedling mix and then covered.

The seed trays should be kept moist and shaded in a warm environment. Seedlings usually germinate within 30days and resemble small green umbrellas, the sprout then arises alongside the umbrella structure which is made by the cotyledons. Seedlings should be allowed to remain in the seed tray for their first summer growing season and can be transplanted into individual containers during their second growing season. Saplings can be planted out into open ground after three or more years.

The species prefers full sun and a well drained soil with regular watering when still young. Protect the saplings from severe frost for the first three to five years. Once established this species is both drought and frost hardy.