Grand Daddy Purple (GDP) is a popular cannabis strain known for its distinctive purple hues and sweet berry aroma. It was created by crossing Purple Urkle and Big Bud, making its debut in 2003 by breeder Ken Estes. This indica-dominant strain is celebrated for its relaxing effects and is often used for pain relief and insomnia. GDP typically flowers in about 9 weeks and yields around 14-17 ounces per plant. Its unique color comes from anthocyanins, which are also found in other purple plants like blueberries.