Expect a major blow to the head from this super-potent strain. A pure sativa, Durban Poison is the beloved inbred descendant of a sativa strain grown in South Africa. It has long been a favorite of stoners and medical marijuana patients here. Durban Poison has THC levels that can reach 24%, making it one of the world’s more powerful strains. This strain hits with a strong, happy head high that’s great for creativity and daytime errands.