The Cuba Organic Support Group (COSG) is a U.K. based organisation which supports the organic movement in Cuba through fund-raising, speakers, publicity and the promotion of Gardening Brigades to Cuba.

COSG was formed in 1997 by members of HDRA, Britain's largest organic gardener's organisation. Since then it has worked with several community based organisations in Havana, providing funds for tools and educational material. Members of COSG ran an ecotour in 1998 and in January 2000 the first gardening brigade. Gardening brigades have run annually in January/February since then.