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Crotalaria juncea

Sunn Hemp is an erect, herbaceous annual shrub. It is a summer legume crop with a well-developed taproot system.


It is primarily used as a cover crop or as a green manure to improve the nitrogen status of the soil. It can also be used as a source of fibre, but has limited use as a forage crop. This is mostly due to its palatability, digestibility and alkaloid toxicity.


It requires a minimum rainfall of 300 mm per annum.


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View guidelines on crop uses, establishment & management.

  • Yields 5-18 t DM/ha/season
    Depending on environmental conditions and management

  • Drought tolerant

  • Fixes high levels of Nitrogen

  • Adapted to low fertility soils

  • Known to suppress certain nematodes species

  • Suppresses weeds

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