Sunn Hemp Cover Crop Helps Suppress Weeds

Wild Hope Farm in Chester, South Carolina, received a Southern Sustainable Agriculture Research and Education (SSARE) Producer Grant to explore summer cover crop mixes for organic no-till broccoli. In this on-farm research, five summer cover crop treatments were implemented in a no-till broccoli field: tilled bareground after sunn hemp; sunn hemp crimped prior to cash crop planting; sunn hemp and millet crimped prior to cash crop planting; sunn hemp, soybeans and buckwheat crimped prior to cash crop planting; and sunn hemp, millet and buckwheat crimped prior to cash crop planting. Beds with cover crop mixes appeared to perform the best at suppressing weeds. In addition, the farmer found that timing of cover crop termination and weight of the roller crimper is important to prevent the reseeding and regrowth of the cover crops. Details on this project are available online from SSARE.