Cinnamon Fern (Osmunda cinnamomea) is a structural plant with green fronds up to 4 feet long. They prefer wet to moist soil in part sun to shade. Colonies typically form as the plants mature, which makes them a good choice for wet, shaded basins. Good companion plants include Tufted Hairgrass (Deschampsia caespitosa) and Goatsbeard (Aruncus dioicus).
No serious maintenance needs.