Recognisable · 2003
Granddaddy Purple
a.k.a. GDP
The defining 'purple' indica — grape candy aroma, deep violet flowering, a benchmark sleep strain.
- Type
- Indica
- Origin
- San Francisco, California
- Bred by
- Ken Estes
- Parents
- Purple Urkle × Big Bud
History
Ken Estes released Granddaddy Purple in 2003 in the Bay Area; it became one of the first California strains to be widely associated with medical use under Proposition 215.
Sensory & chemical profile
Grape candy, sweet berry, lavender. 17–23% THC. Myrcene + caryophyllene + pinene.
UK medical relevance
GDP-leaning phenos are prescribed in the UK as evening indicas. Reported for insomnia, severe pain, muscle spasm and appetite stimulation.
Legacy
Defined the modern purple-indica aesthetic and remains a benchmark sleep strain.
Notable descendants
- Grape Ape
- Purple Punch (× Larry OG)
- Cherry Pie
Patient note
Heritage strain profiles describe the historical lineage and chemovar template. Modern UK pharmacy SKUs derived from these lines will differ in cannabinoid content, terpene ratio and effect. Always consult your prescribing clinician. Nothing on this page constitutes medical advice. Cannabis-based medicinal products in the UK are prescription-only under NICE NG144 guidance.