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Sunn Hemp: Soil-Building Superhero with Forage Potential

Sunn hemp, a tropical plant primarily grown as a cover crop or green manure, has increased dramatically in popularity over the last decade. Originally from India, it’s easy to understand what makes it so popular among vegetable and row crop farmers in the United States.

Grazing must be timed appropriately or sunn hemp will grow beyond the reach of foraging livestock.

Sunn hemp possesses many soil-building traits, including high rates of biomass production — over 20 percent greater than crimson clover and hairy vetch in research trials. It is not only resistant to plant root nematodes but actively suppresses them. In as little as 60 to 90 days it can produce 120 pounds of nitrogen per acre and can suppress weeds up to 90 percent.

Sunn Hemp is adapted to a wide variety of soil and environmental conditions, thriving through hot, dry summers and continuing to grow until the first frost. But sunn hemp isn’t just a soil builder — it also offers benefits as a forage producer. Recent on-farm grazing trials have yielded an abundance of information on using this crop for grazing. Continue Reading →