P91 by Clone Only Strains
If you were smoking out in San Diego in the 90s, you definitely remember the absolute hype surrounding P91. Born in Poway back in 1991, this clone-only heavy hitter reached mythical status long before the internet made every strain famous. It was the undisputed king of the Southern California underground scene, especially before the 2003 "Operation Grow Up" raids busted up the massive indoor ops that were keeping the streets flooded with it. Trying to track down the original cutting today is like chasing a ghost, but the guys who had it knew they were holding something incredibly special.
The exact lineage of P91 has been debated on forums for decades, but the consensus among the old-school heads is that it’s heavily tied to Northern Lights #5, likely cubed or heavily inbred to lock down its signature traits. Some old growers swear there’s a Thai and Skunk mix hidden in there too. Whatever the true recipe, the result was a plant that churned out bright green, rock-hard nugs completely caked in a thick layer of resin that would practically glue your scissors together.
What really set P91 apart was the smell and the high. It had this insanely unique earthy, skunky funk with a weirdly specific "peanutty" and oily undertone that you just don't see anymore. The smoke was thick and expanding, delivering a devastating body blow that could put a novice in the couch for hours, yet it had this strangely functional, almost hallucinogenic head buzz that kept medical patients coming back. You might find seeds claiming the P91 name today, but true heads know nothing beats that original Poway cut.
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Similar strains
| Breeder | Clone Only Strains |
|---|---|
| Type | mostly sativa |
| Environment | Indoors, Outdoors |
| Lineage | Thailand Sativa × Thailand Sativa |
| Descendants | Riot Seeds - Purple P91, El Jefe, P91 BX2, P-91, P-Dubb, Bisquik, Reese's Pieces |
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🧬 Explore the family: Thailand Sativa · Thailand Sativa · Riot Seeds - Purple P91 · El Jefe · P91 BX2 · P-91 · P-Dubb · Bisquik · Reese's Pieces
Ancestry Pedigree
Original Strains
Original Strains
Growing P91: what to expect
As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with Thailand Sativa or Thailand Sativa will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
P91 FAQ
Is P91 an indica or a sativa?
P91 is listed as mostly sativa.
What are the parents of P91?
P91 was bred from Thailand Sativa × Thailand Sativa by Clone Only Strains.
What environment does P91 like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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