With lineage from Grapefruit, Blueberry and South African Sativa, there is a sweet flavor to the Diablo cannabis strain. This indica has a purple hue, fruity and spicy flavors, and a THC content that tends to fall between 15-20%. Diablo has an indoor flowering time of 6-7 weeks and took second place at the 2002 BC Harvest Cup in the outdoor category.