slender sweet flag

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

Tidy old or damaged foliage in early spring if necessary

Propagate by division, in spring

Generally pest-free

Generally disease-free