For wet or boggy soil conditions, choose our 9cm pot option and plant into deep, consistently moist ground at the edge of a bog garden or damp border. Enrich the soil with compost and keep it wet at all times, especially in summer, as the plant thrives in saturated conditions.

For shallow pond margins, pick our aquatic planting basket option which uses a loam-based aquatic compost. After planting, add a 2.5cm (1in) layer of pea shingle or gravel on top to stop soil dispersing into the water. Position the basket so the crown sits just above the waterline or with no more than a few centimetres of water over the soil.

Water marginal plants regularly until well rooted, and keep pond-grown plants topped up to maintain a stable water level. Remove spent flower spikes and old foliage to keep the plant tidy, and divide established clumps every few years in spring to maintain vigour.