How to Fertilize slender sweet flag?
Balanced perennial feed every four weeks from spring through summer

slender sweet flag · Acorus gramineus
Easy to grow in wet or very moist fertile soils. Can be planted in baskets in shallow water up to 10cm deep. It also makes a useful aquarium plant but is short-lived where water temperatures exceed 22°C for long periods. Divide every few years to prevent congestion. See bog gardens for further information
Balanced perennial feed every four weeks from spring through summer