In Jamaica, marijuana, or ganja, as it is more commonly known on the Caribbean island, is used in religious ceremonies by Rastafarians and as a herbal medicine by many others. But it is not just grown for local consumption. According to the US state department, Jamaica remains the largest Caribbean supplier of marijuana to the US as well as other Caribbean islands. Cultivation and import of the drug have been illegal since 1913, although those caught with small amounts are rarely prosecuted.