How to Fertilize button fern?
Balanced perennial feed every four weeks from spring through summer

button fern · Pellaea rotundifolia
Also known as: New Zealand cliff brake; round-leaved fern; tarawera
Requires a moderately fertile, ericaceous, moist but well-drained soil in full sun with protection from hot midday sun, or partial shade. In frost prone areas protect the crown with a dry winter mulch
Balanced perennial feed every four weeks from spring through summer