July 27, 2009

Sunn hemp (Crotalaria juncea) is a member of the legume family (Fabaceae) and has been recognized with great potential since the 1930's. While Sunn hemp was originally studied for commercialization as a multi-purpose crop for fiber production, more recent interest is for use as a cover crop with many soil health benefits. However, lack of reliable seed supply has limited exposure and consideration for Sunn hemp, a tropical plant with all seed production overseas.

Because of growing cover crop interest in high plains no-till agriculture, Star Seed has invested in Sunn hemp and we are bringing to our customers this summer.

Plant SunnHemp RTP into moisture and up to 2 to 2.5" deep and in a wide range of soil types from low pH and up to pH of 7.5. SunnHemp RTP thrives in warm (hot) weather and will tolerate drought and low fertility once established.

Sunn hemp must be inoculated; SunnHemp RTP is a ready-to-plant, pre-inoculated seed with the proper rhizobia bacteria (different than soybeans). Without proper inoculation, Sunn hemp will not fix nitrogen and will not deliver this important soil benefit demanded by cover crop enthusiasts. When comparing seed sources, be sure to understand inoculation and readiness of the seed to plant.

SunnHemp RTP is an excellent consideration after wheat, for fields rotating to corn, sorghum, sunflowers, or any other non-legume crop the following spring/summer. SunnHemp RTP can also be considered between two wheat crops with plentiful moisture as it can reach a height of 40" in 35 to 40 days of growth under favorable growing conditions.

SunnHemp RTP will be killed with the first hard frost or may be sprayed with phenoxy/dicamba/glyphosate combinations at 40 to 48" of height. Alternatively, mechanical cutting of SunnHemp RTP is a consideration. Care should be given under favorable growing conditions to prevent over growth that can cause planting challenges the following crop planting cycle.

Please let us know of your interest in promoting Sunn hemp in your local market and how we can assist your efforts to become Cover Crop specialists in your region.

Website: http://www.gostarseed.com

Published: July 27, 2009