Grow in wet soils or in shallow water in full sun. Best in organically rich loams. Plants are considered winter hardy to USDA Zones 6-10. Plants may also be grown in wet boggy areas. Containers covered by 18-24? of water will generally overwinter in place. Consider bringing other containers indoors to a greenhouse or other frost-free area with bright light. For plants grown in wet boggy soils, cut back tops and mulch heavily in winter.