Culture
Easily grown in moist to wet soils including shallow standing water in full sun to part shade. Prefers some light shade in hot summer climates. In large water gardens, it may be grown in submerged containers. May also be planted in the mud at the margins of ponds or streams or in bog gardens. Clumps may be divided in spring. Naturalizes by creeping rhizomes, and, if left undisturbed in optimum growing conditions, will spread to form colonies. Will self-sow in the landscape. New plants are best started in spring or fall.