||Eastern gamagrass is a palatible and digestible perennial warm season grass that can be used for hay, haylage, and in managed pasture situations. Its use on steeper slopes instead of corn silage will reduce soil erosion and water quality problems. Its perennial nature and large root system would increase carbon sequestration. Companion planting with legumes would be beneficial for reducing erosion, adding nitrogen, and improving yield, forage quality, and weed control. Eastern gamagrass (cultivar ’Pete’) was established in 1998 at 3 sites on tioga silt loam, Valois gravelly silt loam, and Howard gravelly silt loam soils in New York. Alfalfa, birdsfoot trefoil, black medic, red clover, white clover, and oats were interseeded into the gamagrass after a July cultivation. The companion crops established well and provided good erosion control in the fall and winter. The companion crops persisted well into the third year with percent cover for red clover, white clover, birdsfoot trefoil, and alfalfa of 97.8, 96.1, 75.0, and 74.0%, respectively. In 2000 we had abnormally cool temperatures. The perennial companion crops competed with the gamagrass reducing yields compared to the control. The gamagrass yields when grown with alfalfa, white clover, red clover, and birdsfoot trefoil were 69.6, 71.3, and 86.3% of the control respectively. There were significantly higher gamagrass yields outside the companion crop study area due to lack of cover crop competition and better weed control. The eastern gamagrass yields in these areas for two cuttings, on the above soil types were 2.99, 2.75, and 2.11 dry matter tons per acre respectively.