The following are some sedge species to consider for Delaware.
Carex dolichostachya 'Kaga-nishiki', gold fountain sedge
Description: Gold fountain sedge prefers part shade to shade conditions and needs moist soil. It is 10-14" in height and has arching narrow green leaves edged in golden-yellow. This is a low maintenance plant.
Carex flaccosperma, thin fruit sedge
Description: This native plant has wide adaptation and will thrive in sun to shade conditions but needs constant moisture (do not let dry out. It is 8-10" in height, remains evergreen, and has attractive clumps of glass-like blue-green leaves.
Carex morrowii 'Silver Sceptre', Japanese sedge
Description: Japanese sedge prefers part shade to shaded conditions but is adapted to a wide range of soil moistures from dry to moist. One of the benefits of this sedge is that tolerates full sun and dry, drought conditions. It is 12" in height. Japanese sedge has narrow leaves with white margin.
Carex muskingumensis 'Little Midge', dwarf palm sedge
Description: This native plant needs moist soil conditions and is adapted to part shade or shaded conditions. It is 12-15" in height. It is fine textured and compact and is a great native substitute for dwarf bamboo.
Carex oshimensis 'Evergold' sedge
Description: This sedge requires part shade to shaded conditions and needs constant moisture and should not be let to dry out. It is 8-12" in height. This sedge has arching variegated yellow and green leaves and is an excellent groundcover that suppresses weeds.
Carex tenuiculmis 'Cappuccino', New Zealand hair sedge
Description: This sedge does well in sun to part shade in moist soils. It is 12-15" in height. New Zealand hair sedge has chocolate colored foliage and is great as an accent plant or in pots. To avoid winter damage plant this sedge in a protected site.