How to Propagate hard shield fern?
Propagate by spores, sow spores at 15-16°C (59-61°F) when ripe. Divide rhizomes in spring or detach fronds bearing bulbils in autumn

hard shield fern · Polystichum aculeatum
Also known as: prickly shield fern
Grow in fertile, humus-rich well-drained soil in deep or partial shade; protect the crowns from excessive winter wet and provide a mulch around the crown to prevent crown drying out
Propagate by spores, sow spores at 15-16°C (59-61°F) when ripe. Divide rhizomes in spring or detach fronds bearing bulbils in autumn