Greater Pond Sedge
These rushes, with their strong, erect foliage, look lovely by the waterâs edge, planted as a marginal or pondside plant. Leaves are bright green and the flower heads are dark brown spikes. The tall emergent leaves are useful to pond insects such as emerging dragonflies and provide cover for water birds. Plant in a medium container using aquatic soil and covering with pea gravel, or in a moist situation at the pondside. Decaying foliage can be trimmed off in autumn.