Grandaddy Purple, “GDP” is a heavy indica dominant strain created through crossing the classic Big Bud X Purple Urkle strains. The Granddaddy Purple high hits you first with a cerebral rush that leaves you feeling completely euphoric although with a slight numbing effect. A slightly psychedelic effect will slowly wash over your mind, leaving it floating through trippy visions as your body falls into a deep sense of relaxation and peace.