Blueberry GDP (Granddaddy Blueberry) is available at licensed cannabis dispensaries across the US. this cannabis strain is sold as flower, pre-rolls, and in concentrate form depending on the dispensary. Typical retail price for Blueberry GDP (Granddaddy Blueberry) flower is $35–55 per eighth ounce (3.5g) at most licensed dispensaries, though pricing varies by state, market, and dispensary.