Sunn Hemp is another Hemp Plant that falls under the Radar as a solution to what ails the World
|Sunn Hemp is another Hemp Plant that falls under the Radar as a solution to what ails the World|
- ‘Tropic Sun’ sunn hemp reaching heights of over 4 feet in 60 days and over 6 feet in 90 days in Hawaii.
- Biomass production in Hawaii reached yields as much as 6,000 pounds in 60 days.
- ‘Tropic Sun’ was planted in August or early September after corn harvest and was grown as a cover 3 crop/green manure crop until wheat planting (early December).
- Biomass production achieved an average of 5,200 pounds in 9 to 12 weeks over a two-year study at two locations in Alabama.
- This compares with 4,300 pounds per acre with hairy vetch (Vicia villosa L.) and 4400 pounds with crimson clover (Trifolium incarnatum L.) (Mansoer et al., 1997).
- Ground cover from the “Tropic Sun” averaged approximately 96 percent at mowing and approximately 65 percent soil coverage 16 weeks later (mid-April).
- This amount of residue will provide erosion control and promote increases in organic matter accumulations in no-till or conservation tillage systems.
- In Alabama, Mansoer et al. (1997) reported an average of 126 pounds of nitrogen in 9 to 12 weeks. With this large amount of nitrogen produced, whether in spring, summer or fall, a crop such as small grain should follow sunn hemp to utilize the symbiotically produced nitrogen.
- However, in the study conducted by Mansoer et al. (1997), 38 percent of the N in biomass remained available for corn planted in mid-April, 16 weeks after the sunn hemp was mowed.
- ‘Tropic Sun’ added 134 to 147 pounds of nitrogen per acre after 60 days of growth.
Sunn hemp has bright yellow flowers that bloom at about 60 days. Due to its rapid growth and nitrogen-fixing capability, sunn hemp is gaining popularity as a cover crop in the Midwest. Photo by Molokai Seed Company https://mosesorganic.org/sunn-hemp/