Forage, Pasture Health Should You Opt for the Legume? Adding Cowpeas to Forage Sorghum Genevieve Slocum July 18, 2016 Cowpeas are a viney summer annual legume that can climb, tolerate some shade, and fill in the spaces in a summer annual grass, so should you consider adding them to a stand of forage sorghum? The answAll the grazing management tips you need Subscribe to read this article and over 2,500 more! Subscribe today! If you're already a subscriber, log in here.