Vigna unguiculata, or Cowpea, is an annual herbaceous plant grown for its edible seeds and pods. It is a significant source of protein and nutrients in many cultures and is also used as a cover crop to improve soil health. Inputs Hardiness zone 101 Hardiness zone 111 Hardiness zone 121 Outputs Human food1 Type Annual Functions Nitrogen fixer2 Ground cover Footnotes Vigna unguiculata | Plants for a Future ↩ ↩2 ↩3 ↩4 Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 6-3 ↩