Blechnum is fairly unknown in cultivation currently, but is certainly a plant with enormous ornamental value! It requires sun or light shade. 

Height: 3m, 120"

Hardiness zones: 9-10

Seeds per pack: 20 spores (spores are very tiny)

Germination: It is important to use a sterile seed-start mix, or sterile a mix with boiling water, before planting. Use a pot with holes so water can drain. When cool, sow spores on the surface of the mix. Watering should be done from the base only (from a bottom tray), as watering from the surface will bury the seeds and they cannot grow. Cover the pot with clear plastic, and keep in a well lit location as light is required for germination. Do not place in direct sun. The ferns can take weeks or months to germinate.