Introduced in 2003 by Ken Estes, Granddaddy Purple (or GDP) is a famous indica cross between Purple Urkle and Big Bud. This California staple inherits a complex grape and berry aroma from its Purple Urkle parent, while Big Bud passes on its oversized, compact bud structure. GDP flowers bloom in shades of deep purple, a contrastive backdrop for its snow-like dusting of white crystal resin.