Indica

Blackwater Strain

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

THC20% - 24%

CBD0% - 1%

Flowering9 weeks

Top terpenes: Myrcene, Caryophyllene, Limonene

Buy Blackwater

Sold out right now - here's what's close:

Closest flavour in stock Alien Rockstar MyrceneShares the Myrcene, Caryophyllene profile From $30 IN STOCK

Looking for more? Browse all in-stock flower in the cannabis category.

Quick answer

Blackwater is a heavy indica most often credited as Mendo Purps x SFV OG Kush (some menus list Blackberry x Diamond OG), typically testing 20% - 24% THC. Effects: Relaxed, Sleepy, Euphoric, Hungry.

Our TakeGord - senior buyer since 2016

Blackwater is the dark, grape-scented nightcap its name suggests: an indica-dominant hybrid with dark purple buds, a concord grape aroma and a soothing, slow-building body high. The lineage needs an honest note - the most common credit is Mendo Purps crossed with San Fernando Valley OG Kush, while a number of menus (ours included) list Blackberry x Diamond OG; both accounts describe the same dark, grape-forward, sleepy flower, and with legacy cuts this tangled, the jar matters more than the paperwork. I hand it firmly to evening and night smokers: insomnia, pain and stress users report the best results. I do not hand it to daytime anything - the sedation builds quietly and then takes over. The honest downside: it is a one-note nightcap by design; flavour chasers who want a bright daytime profile should look elsewhere, because Blackwater is unapologetically a lights-out strain.

Meet Gord - his rules, his picks, his story

From Gord’s Ranked Picks: Best Indica Strains in Canada (2026) →

Reported effects

Relaxed0%

Sleepy0%

Euphoric0%

Hungry0%

Happy0%

Lab Sheet

Strain facts – the numbers behind the high

THC Range

20% - 24%

Individual batches vary; craft lots often test higher.

CBD Range

0% - 1%

Trace amounts only. This is a THC-driven profile.

Type

Indica

Ratio drives the shape of the high.

Top Terpenes

Myrcene · Caryophyllene · Limonene

The terpene leaders behind the flavour and feel.

Flowering Time

9 weeks

Grower reference for cultivar finish time.

Where this sits in the indica laneMost indicas test 15% to 22% THC

Lower

Typical

Upper

Blackwater Strain: 20% - 24% THC. Right in the sweet spot of the indica lane.

The takeaway: Published ranges describe typical batches. Check the in-stock list above for the exact lot on the shelf today.

The story of Blackwater

Blackwater is a Mendocino story. The most common lineage credit - Mendo Purps crossed with San Fernando Valley OG Kush - pairs the famous purple grape sweetness of Mendocino with the heavyweight OG structure of the Valley, and the result is exactly that: dark purple flowers, concord grape aroma, OG-grade sedation. A parallel account lists Blackberry x Diamond OG, and with legacy California cuts this tangled, both trees describe the same style of flower. What is not disputed is the effect: Blackwater built its reputation as a nightcap, and the name - dark water, deep sleep - is a fair warning label.

Terpene breakdown

Myrcene leads, carrying both the grape-berry sweetness and the heavy body sedation. Caryophyllene adds a peppery, earthy spice that keeps the fruit from going flat, and limonene contributes a quiet citrus lift on the first exhale. The profile is dessert-dark: grape, berry, earth, spice.

Growing Blackwater

A 9 week finish with large, dense, dark purple buds under a heavy trichome blanket. The purple comes from cool-finish anthocyanins and the Mendo side of the tree; expect broad indica structure, moderate stretch and a strong grape-and-earth aroma in flower. Watch humidity late - the dense purple flowers are moisture traps.

How to consume Blackwater

An hour or two before bed. The mellow start is real - gentle euphoria, a warm body - and the sedation builds quietly underneath until it owns the evening. Pain, stress and insomnia users report the most benefit; the munchies arrive mid-arc. Save it for when the day's work is genuinely done.

Blackwater vs similar strains

Against Granddaddy Purple, the other famous purple grape indica, Blackwater is less sweet and more OG-spicy. Against Blackwater OG, its SFV-leaning cousin, the difference is emphasis rather than kind. Indica dominant hybrids cover the wider lane.