Granddaddy Purple
Also known as: GDP, Grand Daddy Purp, Granddaddy Purps
Breeder: Ken Estes (Grand Daddy Purp Collective)
Granddaddy Purple helped define the commercial 'purple era' of California cannabis. Popularized in 2003, it is renowned for its striking deep purple buds, complex grape-berry aroma, and potent full-body sedation. Its effects are often described as feeling stronger than its THC percentage suggests, likely due to the myrcene-linalool synergy. GDP is widely credited with demonstrating that visual appeal could be a defining commercial trait.
Lineage & Genetics
Cross: Purple Urkle x Big Bud
Purple Urkle is a clone-only California indica known for deep purple pigmentation, believed to descend from Mendocino Purps. Big Bud is a high-yielding indica from Sensi Seeds, traced back to (Big Bud x Northern Lights #1) x Big Bud, with Afghani ancestry.
Lineage Dispute
Ken Estes has given multiple accounts — Purple Urkle x Big Bud vs. Mendo Purps x Skunk x Afghanistan. These may not be mutually exclusive since Purple Urkle descends from Mendocino Purps. The authentic GDP is clone-only.
Terpene Profile
Myrcene — Primary driver of sedative character; 0.5–1.4%
Beta-Caryophyllene — Spicy, peppery; 0.2–0.6%
Linalool — Floral, lavender; notably high for an indica; 0.2–0.5%
Aroma: Sweet ripe grape, mixed berry, candy-like sweetness with earthy, floral undertones.
Flavor: Rich grape soda, berry jam, violet/floral notes, finishing with earthy pine. One of the most recognizable flavor signatures in cannabis.
Effects & Experience
Onset: Initial cerebral euphoria within 5–10 minutes — a dreamy, uplifting headspace that transitions quickly.
Deep physical relaxation and body heaviness, pronounced appetite stimulation, strong sedation at higher doses. Best suited for evening/nighttime use.
Duration: 2–3 hours, with residual sleepiness lasting longer
Commonly Reported Uses
Growing Characteristics
Grow Tips: Classic indica morphology with broad fan leaves and tight internodal spacing. Dense buds susceptible to bud rot — keep humidity below 50%. Heavy cola weight may require stakes or trellis. Benefits from high-P/K bloom formulas.
History & Origin
Emerged in 2003 from the San Francisco Bay Area medical cannabis scene. Ken Estes, paralyzed after a 1977 motorcycle accident, developed the strain seeking a pain management tool. GDP's combination of visual appeal, reliable efficacy, and massive yields made it an instant commercial success. It is estimated that GDP-derived strains account for 15–20% of the indica flower market in California.
Awards & Recognition
- ●2004: 1st Place — Inglewood Medical Cannabis Cup
- ●2004–2006: 1st Place — Green Cup (three consecutive years)
Notable Crosses
Strains bred using Granddaddy Purple as a parent:
Want to Grow Granddaddy Purple?
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