Sunn Hemp is a fast-growing annual plant with yellow flowers. It is used as a cover crop to improve soil health, suppress weeds, and add organic matter. Sunn Hemp is also used for its fiber and as green manure. Outputs Human food1 Fibre1 Type Plant Herb1 Annual Functions Nitrogen fixer2 Ground cover Green manure1 Footnotes Crotalaria juncea | Useful Tropical Plants ↩ ↩2 ↩3 ↩4 Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 6-3 ↩