Tropic Sun
Sunn hemp(Crotalaria juncea)
A US-released sunn hemp cultivar, jointly released in 1983 by the University of Hawaii (CTAHR) and the USDA Soil Conservation Service (now NRCS) as a green manure and forage type. It is notable for being non-toxic to poultry and livestock in feeding trials, unlike toxic strains of Crotalaria juncea and other Crotalaria species.
Visual Characteristics
Erect, fast-growing annual reaching 4-6 ft (up to ~1.8 m), attaining much of that height within 60 days under favorable conditions, with yellow flowers.
Growing Tips
A short-day cultivar that flowers and sets seed poorly at higher latitudes, so reliable seed production is largely limited to tropical/subtropical zones; grows rapidly and is used to add nitrogen, suppress weeds, and reduce nematodes.
Resistance Information
Disease Resistance
Resistant to root-knot nematodes (Meloidogyne spp.); used in crop rotation for nematode suppression.
Where to Buy
Sourcing information coming soon. Check local nurseries and seed banks for availability.