Easily grown in a damp to wet soil in full sun or shade. Members of this genus are rarely if ever troubled by browsing deer.

Root - cooked. Seed. No further details are given, but the seed is small and fiddly to use.

Seed - sow in situ in the spring in a moist soil in light shade. If seed is in short supply it can be sown in a cold frame and be planted out in the summer. The seed usually germinates in 2 - 6 weeks at 15°c. Division in spring. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the summer or following spring.

By fen ditches and in wet places by rivers and lakes in base-rich soils.