Bloomsz Marginal Bog Plant Collection - Roots (8 pack) Add unique and colorful features to the margins of ponds and water gardens with our iconic collection of Marginal Bog Plants. Winter hardy, the plants do not have to be removed from the pond or water garden during the winter. Pre-planted in weighted net bags to protect the tubers from being eaten by fish. Simply drop the plants in the desired place in the pond. Prefer full sun. Grows 24-34 tall. Plant 12 apart. Perennial in Zones 2-11. Growing Instructions: Bog and marginal water plants do best in shallow water up to 6 deep and should be planted after the spring chill has subsided.