Indica Dominant Hybrid
OG #18 Strain
Also known as: Private Reserve OG, Private Reserve, OG 18
THC19% - 26%
CBD0% - 1%
Flowering9 weeks
Top terpenes: Limonene, Myrcene, Linalool
Quick answer
OG #18 (aka Private Reserve OG) is DNA Genetics' Sour Diesel x OG Kush backcross, typically testing 19% - 26% THC with limonene leading the profile. Effects: Relaxed, Sleepy, Tingly, Happy.
OG #18 is the OG that other OGs get compared to: DNA Genetics' Sour Diesel x OG Kush backcross, documented on Leafly at about 22 percent, aliases Private Reserve OG. The nose is pungent earth and diesel with a lemon top and a rare linalool softness, and the high is textbook evening OG, heavy, tingly and reliably sleepy by the third act. I hand it to OG loyalists and insomniacs. I do not hand it to anyone with evening plans; the name of the game is surrender. The honest downside: dry mouth is not optional.
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Strain facts – the numbers behind the high
THC Range
19% - 26%
Individual batches vary; craft lots often test higher.
CBD Range
0% - 1%
Trace amounts only. This is a THC-driven profile.
Type
Indica Dominant Hybrid
Ratio drives the shape of the high.
Top Terpenes
Limonene · Myrcene · Linalool
The terpene leaders behind the flavour and feel.
Flowering Time
9 weeks
Grower reference for cultivar finish time.
Lineage
Sour Diesel x OG Kush backcross #18 (DNA Genetics)
Documented parent genetics.
Where this sits in the indica laneMost indicas test 15% to 22% THC
OG #18 Strain: 19% - 26% THC. Right in the sweet spot of the indica lane.
The story of OG #18
OG #18 is DNA Genetics' famous backcross, commonly cited as
Sour Diesel x OG Kush, with the #18 marking the selected phenotype that made the cut. Leafly documents it as a hybrid around 22 percent THC, aliases Private Reserve OG and Private Reserve, with pungent, earthy, diesel flavours and relaxed, sleepy, tingly effects reported by nearly 500 reviewers. It is old-guard OG genetics with a sour twist, and it remains a benchmark that newer OG hybrids get measured against.
Terpene breakdown
Limonene leads with a bright, almost lemony top that cuts the fuel, myrcene supplies the heavy, earthy body, and linalool adds a rare floral softness that separates OG #18 from harsher OG cousins. Leafly's flavour tags are pungent, earthy and diesel, with the sour-diesel parent showing up as a sharper, almost skunky edge on the exhale.
Growing OG #18
About 9 weeks indoors in the OG mould: medium height, sturdy branches, dense resin-heavy colas and a pungent fuel-floral nose that needs serious filtration. DNA bred it for stability, and it has a reputation for finishing reliably with high resin output, which is why it keeps showing up in new OG crosses.
How to consume OG #18
Evenings. Leafly's top effects run relaxed, sleepy and tingly: a heavy, calming OG body with a surprisingly bright first hour. A dry herb vape around 185 to 195 C keeps the lemon over the diesel; joints lean earthier and stronger. Moderate-high THC with real sedation at the back end, so plan the evening around it. Water nearby, dry mouth is standard OG fare.
OG #18 vs similar strains
Against
Sour Diesel, its sour parent, OG #18 is heavier, sleepier and more body-forward. Against
OG Kush, the other parent, it is sharper and more energizing at the front.
Fire OG and
Platinum OG are the closest heavy-OG neighbours on the menu.
Frequently asked questions
What is OG #18 strain?
DNA Genetics' famous Sour Diesel x OG Kush backcross (the selected #18 phenotype), aka Private Reserve OG, commonly quoted 19 to 26 percent THC.
What does OG #18 taste like?
Pungent, earthy and diesel with a lemony top and a soft floral note from linalool.
Is OG #18 indica or sativa?
A calming hybrid: heavy, tingly body relaxation with a bright first hour.
How strong is OG #18?
About 19 to 26 percent THC depending on batch, with real sedation at the back end.
Is OG #18 the same as OG Kush?
No. OG Kush is a parent; OG #18 is a selected backcross with the Sour Diesel influence showing.
Where can I buy OG #18 in Canada?
Check the in-stock list above, BMWO ships Canada wide with live pricing and Xpresspost tracking.
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