Grandaddy Purple THCA Hemp Flower Guide: Potency, Flavor, Effects & Quality Some strain names fade quickly. Others become part of the culture. Grandaddy Purple THCA hemp flower, often spelled Granddaddy Purple and commonly shortened to GDP, belongs in the second category. It is one of the classic purple strain names people still recognize for its deep grape-style aroma, rich color, and heavy indica-style reputation. This gui… Read more