How to Fertilize New Zealand tree fern?
Very dilute fern feed monthly during warm active frond growth

New Zealand tree fern · Dicksonia squarrosa
Grow outdoors in a moist but well-drained humus-rich soil. In hot, dry summers water the stem but avoid watering the crown in winter. Will grow without winter protection only in milder areas
Very dilute fern feed monthly during warm active frond growth