GDP is a close relative to Purple Erkle, Grape Ape and many other purple strains created in northern California. The plant is a short bushy indica with heavy branching. GDP is known to be susceptible to spider mites but there are new phenos that have breed this phenotype out. The smoke has a pungent sweet grape aroma and the high is rather clear for an Indica. Granddaddy Purple has taken first prize in The Inglewood Medical Cannabis Cup in 2004, and the Green Cup in 2004, 2005, and 2006.