Og #18 Strain

If you’re looking for a well-rounded, Indica-dominant strain with a potent punch, look no further than OG #18. As a strain, it is often overlooked and undervalued by the cannabis world, however, we think it’s one of the best out there. 

It has a wonderful cerebral and body high that calms the mind and alleviates any aches and pains you might be experiencing. If this sounds like it’s up your street, check out the information on OG #18 below.

From its genetics to its medical benefits, we’ve covered it all! Also, be sure to take a look at our handy growing tips if you fancy a challenge. 

Strain History 

OG #18, also known as Private Reserve, is a potent, hybrid, Indica-dominant strain. At around 70% Indica 30% Sativa, it provides an intense cerebral high that helps to wash away stresses and concerns. 

In fact, thanks to its innovative genetics, OG #18 has won multiple awards, including the High Times Cannabis Cup in 2009 and 2010, the Europe Champions Cup, and the Spannabis Indoor Hydro Cup. 


OG #18 is a sour phenotype of OG Kush. As you’re probably aware, OG Kush has quite the legendary status within, and even outside, the cannabis community. 

Although, the genetics of OG Kush remains a mystery. Many argue that it is a cross between a Hindu Kush landrace and Chemdawg. It is also possible that OG Kush is a distinct phenotype of some other strain, and became known to the world through an undocumented bad of seed. 


OG #18 was bred by DNA Genetics using OG Kush. DNA Genetics is one of the most well-known and highly regarded cannabis brands. They were established in Amsterdam around 2004. 

Strain Appearance 

OG #18 buds are generally very dense and thick, in addition to being highly resinous. They are coated in a layer of white trichomes, which give them a sticky texture. 

Trichomes are sticky glands that cover the flowers of a cannabis plant. They serve various purposes but are often used as a sign of higher potency. 

OG #18 buds can also be covered in orange pistils. These are a sign that the buds came from an unpollinated female plant which, in turn, is also a sign of a more potent strain. They are also very aesthetically pleasing. 

Strain Flavor

The sourness of OG #18 is sure to hit you quickly. In particular, it lets off a burst of diesel flavor, followed by a familiar earthy, pine taste. 

Strain Aroma 

OG #18 has a particularly pungent aroma. Even as it grows, it has a very strong scent that increases in intensity as it approaches its flowering time. 

Similar to its flavor, it has strong notes of diesel and pine. However, whereas the flavor is sour, this sourness is more subtle in its scent. Sourness will likely come in the form of subtle hints of citrus. 

Strain Cannabinoids 

If you’re looking for a mid-range to potent strain, OG #18 might be perfect. It has an average THC content of around 16% to 18%.

However, this can vary quite significantly. Some versions have been known to have a THC content of over 20%. As such, due to its potential potency, it’s important to proceed with caution. 

Although, if you were hoping for a strain with a decent CBD content, OG #18 isn’t the one for you. In fact, OG #18 often has little more than 0.1% CBD content. 

Strain Terpenes

Terpenes are naturally occurring chemical compounds found in most plants and even some animals. In cannabis, they are known to give strains their unique flavor and smell.

In recent years, they have also become known for boosting some strain-specific effects. 

The top terpenes within this strain are Limonene, Beta-Caryophyllene, Linalool, Beta-Myrcene, and Alpha-Pinene. The most dominant strain is Limonene, at 0.69%. 

Limonene is one of the most well-studied terpenes found in cannabis. It is known to boost mood, alleviate stress, and aid with focus. It is also used by consumers to help battle the symptoms of depression and anxiety. 

Although, Linalool is also quickly becoming quite a popular terpene amongst consumers. Linalool is thought to have an effect on the serotonin receptor, and thus, is often used by consumers to help alleviate the symptoms of anxiety, depression, and insomnia. 

Strain Side Effects 

OG #18 comes with all of the normal side effects. For instance, it’s likely to cause a dry mouth and dry eyes, so be sure to have some water to hand! 

As an Indica-dominant strain that can be quite potent, it’s also important to take it slowly. Overconsuming could result in a particularly overwhelming effect. As such, users should refrain from higher doses.

Further, less experienced consumers should maybe begin with a more mellow strain. 

Medical Benefits 

Thanks to its potency combined with its fast-acting nature, OG #18 is often used to soothe achy pains. For these reasons, in addition to its Indica-dominant make-up, OG #18 is also used to help fight insomnia.

Towards the end of the high, OG #18 encourages you to drift off, making it ideal for those who struggle to relax before bed. 

OG #18 is also used by consumers to alleviate some mental health problems. For instance, by helping you relax and inducing a feeling of contentment and comfort, the symptoms of severe depression or anxiety may be bolstered by consuming OG #18. 

Strain Review 

OG #18 is the perfect strain to get you feeling relaxed, content, and euphoric. It is also very fast-acting and long-lasting, making for quite an intense experience.

Figuring out what dosage is appropriate for you should be done with care, as too much will overwhelm you for a really long time! 

However, if you hit the sweet spot, OG #18 is a wonderful strain that has gone largely underrated within the cannabis world. It is the perfect strain to elevate a chilled movie night, thanks to its ability to instantly calm the mind and body.

Though, it is worth noting that this is not a strain you should consume before heading to work. Its sedative effects might make certain activities pretty tricky! 

According to consumers, the medical benefits of this strain are also second-to-none.

It has a great ability to alleviate intense pain, to the extent that, after consuming, you should be able to carry out some of your day-to-day activities that would have otherwise been impossible.

Further, according to some consumers, the way it calms the mind can help alleviate anxiety. 

Strain Grow Info 

If OG #18 sounds like your perfect strain, you’re in luck! This strain is actually fairly easy to cultivate, can grow well in both indoor and outdoor spaces, and is resistant to mold, many diseases, and pests! 

Strain Seeds

OG #18 seeds are actually not too difficult to come by and they are generally feminized. Feminized seeds are cannabis seeds that have been bred to eliminate male chromosomes.

As such, these seeds only produce female plants. This is good as it is only the female cannabis plants that produce smokeable buds. Specifically, female plants produce significantly more THC and CBD than their male counterparts.

There are a number of benefits of feminized seeds.

They eliminate the unnecessary work of maintaining male plants that will be of no further use to you, in addition to potentially providing a larger yield, as there is more space for the female plants to grow and flower when the male plants aren’t taking up room or resources. 

Strain Flowering Time 

If you plan on growing this strain outdoors, it is necessary that you live in a Mediterranean climate. Using a greenhouse is also preferable. You should harvest the outdoor plant around late September or early October for a good, healthy yield. 

If you plan on growing indoors, it might be a good idea to invest in a hydroponic system. This is a cultivation method that doesn’t use soil but rather uses sand, gravel, or water, with added nutrients.

These systems are more efficient than soil-based gardens, as the plants can directly uptake oxygen and nutrients. With this system, you can expect your plant to flower within 8 to 9 weeks. 

Strain Yield 

If you decide to grow outdoors, you can expect a yield of 20 oz per plant. Though, you can encourage a higher yield by learning some topping and pruning techniques. 

If you trim off the tip of the plant and cut back some of the larger leaves, you might be able to encourage a larger yield. 

On the other hand, if you decide to grow indoors, you can expect a yield of roughly 16 to 18 oz. 

Final Thoughts 

If you’re looking for a punchy Indica-dominant strain that is sure to completely relax your mind and body, look no further than OG #18.

It’s also a fairly easy strain to grow, making it a great option for anyone new to growing cannabis. However, it can have a potentially overwhelming THC content if consumed to excess, so be sure to start with a small dosage to prevent any unwanted side effects.

Dave Roberts
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