||Switchgrass filter strips were established in cropland on the Alligator River National Wildlife Refuge in Dare County, North Carolina. They were planted to filter nutrients and sediment from the prior converted cropland. The filter strips were 75 feet wide on either side of 300-feet wide cropland strips with surface ditches separating the strips. They were seeded with a mixture of switchgrass, lespedeza, clover, and oats broadcast with regard to the cropland. After four years, the filter strips were dominated by perennial native forbs. The seeded species never established a stand due to poor species and cultivar selection for the poor soil drainage, late seeding date, and poor establishment practices. The native forbs provide habitat for grassland songbird species and raptors that prey on rodents living in the filter strips.