image by The texture of a sedge leaf is magnified by water.
Slough sedge is an aquatic plant of the North American temperate western coastal regions that controls erosion and improves water quality. It grows in shallow water, roots anchored in the soil. Though it prefers fresh water, sedge can also grow in brackish water. The plant puts out rhizomes, produces flower spikes and grows up to 150 centimeters (about 1.5 yards) high. Accomplish propagation with rootstock or seedlings, as seeds wash away, correct seeding density is unknown, according to the USDA, and other methods have higher survival rates. Wildlife uses sedge for cover, nesting and food.
Buy or collect slough sedge. Collect sedge by digging down 6 inches or so to get plant plugs.
Wash soil away from the roots, if desired.
Transport and store plugs of slough sedge in a cool place until you can plant them, which should be as soon as possible. Roots should be kept moist or in water.
Split plugs into smaller sections, if desired, as long as each subdivided plug retains a good rhizome and plant tops. (Rhizomes are underground stems that have roots and shoots growing from them. It is a reproductive strategy.) Don't make plugs smaller than about 2.5 by 2.5 inches (6 by 6 cm).
Cut leaves and stem back to about 6 to 10 inches (15 to 25 cm) high so that each transplant will devote its energy to root production.
Transplant seedlings to sunny to mostly sunny marshy banks, mud or other wetland areas where the regular depth of water is about 4 inches (10 cm). The density of planting depends on environment. Space a meter apart unless the water is flowing and/or if the soil is very fine, in which case, plant one-half meter apart. Increase density also if the plants will be on sleep slopes or in places that will see long periods of high water levels.
Prune by cutting at the base in late summer, after the sedge has produced seeds. Only cut shoots that have no flowering stalks.
Remove barriers to growth: branches, stones and so on.
Remove other plants from sedge stands so they have no competition.
Propagate by division, dividing clumps of sedge in spring, leaving a plug with rhizome and vegetative growth as described for sedge collection.
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