Granddaddy Purple — commonly abbreviated GDP — is a California indica icon bred by Ken Estes in 2003 through a cross of Purple Urkle and Big Bud. The strain's dense, compact buds are blanketed in a deep purple coloration derived from anthocyanin pigments that activate under cooler growing temperatures. GDP's terpene profile is fruit-forward, dominated by myrcene with supporting notes of grape, berry, and floral sweetness. The effects follow a classic indica arc: an initial wave of cerebral euphoria that gradually gives way to deep physical relaxation and sedation. GDP is widely regarded as one of the benchmark strains for nighttime use, with consumers reporting effective relief from insomnia, muscle tension, and appetite loss. Its predictable effects and stunning visual presentation have made it a staple in dispensary menus across every legal market.