Medical Marijuana Strains – Cannatonic, Island Sweet Skunk, Purple Kush March 22, 2021 cbdnews Marijuana Health Benefits Comments Off on Medical Marijuana Strains – Cannatonic, Island Sweet Skunk, Purple Kush These three medical marijuana strains include an indica strain (Purple Kush), a sativa strain (Island Sweet Skunk), and a high CBD hybrid strain (Cannatonic).