Propagation
Divide rhizomes in to lengths during growing period. Plant upwards in well drained moist soil, apply bottom heat. 

Place spores on sterilised sphagnum or peat moss then cover with glass, keep moist for 4 to 6 weeks maintaining a temperature of 16º C (61º F), with indirect light. 
Cleanliness is essential during the propagation process.

Botanic information
Leaf: The dark green quadripinnatifid fronds are up to 700 mm (28 in) long by 500 mm (20 in) wide with a stipe up to 800 mm (31½ in) long by 5 mm (⅛ in) in diameter and are densely hairy at the base. Each frond has more than 10-pairs of pinnae that reduced in size towards the apex and are arranged alternately up to 100 mm (4 in) apart along the rachis. 

The sub-triangular pinnae are up to 250 mm (9¾ in) long by 200 mm (7¾ in) wide and have a stalk that is up to 30 mm (1⅛ in) long. The larger pinnules are oblong to oblong-lanceolate and narrow towards the acute apex and the smaller sessile distal pinnules are hairy on the underside.

Flower: The fertile fronds are similar to the sterile fronds and the large sori appear on the underside terminally on the veins, marginally. The indusia is half cup-shaped and they appear during summer.

Fruit: The spores are produced in the sporangium during the sporophyte stage of the fern life cycle and appear terminally on the veins on the back of the fertile frond. The spores are very small (like fine dust) and are released from the sori when mature and dispersed by wind or water.