Blackwater

Also known as: Blackwater OG, Black Water, Black Water OG, Black Water Kush

Breeder: The Cali Connection

Lineage & Genetics

Cross: Mendo Purps x SFV OG Kush F3

Mendo Purps (aka Mendocino Purps / The Purps): legendary California clone known for intense purple coloring and aromas of pine, caramel, and coffee; strong sedative effects. SFV OG Kush F3: San Fernando Valley cut of OG Kush bred to F3 generation for stability; contributes aggressive Kush backbone, heavy resin production, and fuel/lemon terpenes.

Terpene Profile

Aroma: Leads with heavy grape and musky earth. Breaking buds releases a second wave of pine, lemon peel, and sharp fuel. Pungent enough to fill a room. Some phenotypes express blue cheese undertones from the OG side.

Flavor: Sweet grape on inhale driven by myrcene dominance. Exhale transitions to earthy pine with lemon and woody undertones. Finish is smooth and lingering with occasional spicy/peppery notes from caryophyllene. Extended cure (4–6 weeks) clarifies the grape notes significantly.

Effects & Experience

Onset: Brief cerebral buzz — giddy, slightly euphoric uplift lasting only a few minutes before the indica body effects take over.

Heavy, warming full-body sedation builds progressively into couch-lock. Strong appetite stimulation. Mood elevation without energizing qualities. Described as 'narcotic' and 'floating.' Not incapacitating but deeply relaxing with munchies.

Duration: 2–3 hours typical. Sleep-inducing sensation intensifies near tail-end. Re-dosing accelerates sedation into full slumber.

Growing Characteristics

Grow Tips: Drop night temperatures to 16–18°C in final 3 weeks to unlock deep purple/black coloration via anthocyanin expression. Sensitive to nitrogen toxicity — transition to low-N, high-P/K bloom nutrients by week 4 of flower. Dense bud structure makes it highly susceptible to mold in stagnant/humid air; aggressive defoliation and airflow are critical. Maintain pH at 6.0–6.3 in soil; fluctuations cause nutrient lockout during late-bloom swell. Minimal stretch weeks 1–3; resin production peaks weeks 7–10 when colors shift dramatically. Requires 14-day slow dry minimum; grape/berry notes only fully develop after 4–6 week cure. Top early to maximize lateral growth and number of colas on this naturally squat plant.

History & Origin

Created by Swerve of The Cali Connection as a special release for the 2010 High Times Cannabis Cup in Amsterdam. Named after one of Swerve's favorite songs. His stated breeding goal: 'achieve one of the darkest Purple OG Kushes there is.' Quickly gained recognition in California medical dispensaries for its reliable sedation. Won multiple cups between 2014–2016. The feminized version (Mendo Purps x Tahoe OG S1) was released separately and won the 2014 High Times Medical Cup LA placement.

Notable Crosses

Strains bred using Blackwater as a parent: