These two videos were taken in Starkville, MS on March 10, 2020. Watch both and note how a planting date difference of three weeks and ground moisture differences in the same vicinity can affect certain species.
By the Midwest Cover Crop Council. This tool currently focuses on choosing the correct cover crops for the twelve Midwest states, but has applications beyond. Site includes detailed species information as well.
The mission of the NECCC is to support the successful implementation of cover crops to maximize economic, environmental, and social benefits. Their site has an integrated decision tool to assist farmers in Northeastern states with cover crop selection.
The mission of the SCCC is to promote the successful adoption and integration of cover crops into southern agriculture systems. The site includes an interactive cover crop selection tool specifically for the Southeast region of the US.