How to Fertilize spiked ginger lily?
Balanced perennial feed every four weeks from spring through summer

spiked ginger lily · Hedychium spicatum
Under glass, grow in loam-based potting compost in bright indirect light. In the growing season water freely and apply a balanced liquid feed weekly. In winter keep just moist and remove old stems as they deteriorate. Outdoors grow in humus-rich, moist but well-drained soil in partial shade, with shelter from cold winds. Cut back stems when frost blackens the foliage and apply a deep, dry winter mulch
Balanced perennial feed every four weeks from spring through summer