The magical Granddaddy Purple was developed in 2003 by Ken Estes by crossing Big Bud with Purple Urkle, two Indica-rich strains. The strain is predominantly Indica （80%） and contains between 20 and 23% THC, which beginner weed users might find moderately high. The CBD level in the strain is negligible, and most tests have never detected this nonpsychotic cannabinoid. CBD level at 0.4%. Like other Indica-dominant strains, Granddaddy has a short stature and only reaches 90cms at maturity. Buds from Granddaddy Purple are massive and dense, covered with yellow-orange pistils and a thick crystalline THC layer, giving the strain an aesthetic appearance.