Robert Bergman

October 3, 2020

What this legend of a strain lacks in clear heritage, it makes up for with its definite and much-appreciated abilities. G13 is an indica-dominant strain that has been used by many patients and recreational users alike.

Sativa/Indica %Indoor YieldOutdoor YieldFlowering Period
30% / 70%21 oz/ m240 ounces per plant11 weeks indoors, end of October to mid November outdoors.

This particular strain is quite possibly one of the most mysterious hybrids out there. Legend has it, that in the 1960’s, the CIA, FBI and other government agencies, joined forces and decided to create the most engineered super-strain possible, resulting in this gem of a hybrid.

G13 was consequently, as the stories indicate, released by an anonymous lab technician, and then became available to the masses. This hybrid was reportedly created out of a mid of the best super-hybrids of that era, in a top-secret lab at the University of Mississippi, but was merely one of the rumored many.

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That said, there isn’t actual evidence to support this theory, but it does make for a great story. And also, really the only story that may hint on the actual parentage of this undisputed super-hybrid.

Information about G13 Strain:

EFFECTSrelaxed – 10
happy – 7
euphoric – 7
uplifting – 6
sleepy – 5
dry eyes – 3
dizzy – 3
paranoid – 2
headache – 1
FRAGRANCEberry, earthy, pungent, skunky, sweet
FLAVORSpine, sweet, woody
MEDICALstress – 10
depression – 7
pain – 7
insomnia – 5
headaches – 4
FLOWERING TIME OUTDOORSend of October to mid November
THC CONTENT %22%-24%
CBD %0.25%
INDICA / SATIVA %70% / 30%
OUTDOOR YIELD40oz/ plant
CLIMATEdry and sunny outdoor climate

* 10 is the highest
* 1 is the lowest


This super-strain has many pleasant effects, and is loved for just that. G13 will relax you in a big way – it will clear you of all the stress that you may be feeling, and make you think of right here right now, and simply lead you into a good mood.

We don’t currently sell G13 seeds. Check out other indica dominant seeds in our marijuana seed bank.

G13 is great at infusing lots of happiness into your life. This hybrid will encourage you to hang out and just enjoy your time, communicating with your friends and being talkative and pleasant. A state of euphoria can be expected when smoking this mysterious strain, with a buzzing and relaxing head high.

G13 Effects
The Mysterious & Heavy Hitting Power-IndicaImage powered by Marijuana.com

If you are on the search for something to uplift you, then this is the strain you have been looking for. G13 is a heavy indica-dominant smoke, and will often make you feel sleepy, so if you smoke a little extra of this good bud at bedtime, you can expect to slowly drift off into a blissful and restorative sleep.


This sweet-smelling strain practically reeks of wild berries, instantly inviting you by making your mouth water. G13 smells notoriously skunky, mixed with an earthy loveliness that will make smoking this pungent plant an unforgettable experience.


G13 has a distinct sweet pine flavor that instantly tell you what kind of strain you are smoking. This hybrid tastes woody and mossy, and will coat your lips with an unmistakable creamy sweet flavor, adding to the experience.

Adverse reactions

This hybrid has very few side effects, which just means that the specific engineering of this strain was very successful, if we are to believe the mysterious stories about its heritage. G13 can in rare cases cause a slight headache at the end of the high.

The Adverse Reaction Of G13
The Adverse Reaction Of G13

G13 can cause a case of cottonmouth, making you feel parched and like you need a drink of water. This is often also accompanied by some dry eyes. Sometimes, G13 can also make you feel dizzy, especially if you smoke a large amount. This may in some cases turn into a little bout of paranoia, but doesn’t usually last long.

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G13 has many medical purposes, and is popular among doctors and patients in the medical cannabis scene for good reason. Chronic stress is something many people suffer from, and this strain can offer up much-needed relief for this debilitating ailment.

We don’t currently sell G13 seeds. Check out other indica dominant seeds in our marijuana seed bank.

The strong happy properties of this strain make it a powerful happy smoke. It is an effective mood-lifter, and is therefore recommended to those patients who suffer from depression and anxiety. G13 can help loosen you up and release you from the negative thoughts you may be harboring.

G13 is also the perfect strain for those who may need help managing their pain. It is also effective for the treatment of headaches, and can eliminate a variety of pain issues, such as muscle spasms, joint pains and chronic migraines. This hybrid also is amazing at encouraging sleep, due to its potent tranquilizing features.


This plant needs space to branch out, in order for it to flourish. G13 needs a lot of space upward, because it can grow quite tall. During flowering periods this hybrid may need some extra support. G13 is okay with higher temperatures, and is tolerant with weather fluctuations, making it easy to cultivate.

The Growing G13
The Growing G13

Flowering Time


G13 can be expected to yield an average of about 21 ounces per square meter planted. This plant takes around 10 weeks to flourish and become ready for a generous and high yielding harvest.


This hybrid yields highest in the great outdoors. G13 can be expected to yield around 40 ounces per plant, if you give it enough room to grow. This bud is usually ready for plucking around the end of October till the middle of November.


  1. Unclear

FAQ About G13 Strain

What is the G13 strain yield?

G13 yields 21 oz/ m2 indoors and 40 ounces per plant outdoors.

How much THC does G13 have?

From 22% up to 24% THC.

What are the origins of the G13 strain?


Have you ever smoked or grown your own G13? Please let me know what you think about this marijuana strain in the comments below.


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The founder of I Love Growing Marijuana, Robert Bergman, is a marijuana growing expert that enjoys sharing his knowledge with the world. He combines years of experience, ranging from small-scale grows to massive operations, with a passion for growing. His articles include tutorials on growing... [read more]

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  1. By Woodrow ,26 Apr 2017
    Why do other plants flourish while g13 suffers wilted leaves curling under ect
    1. By latewood.ILGM ,27 Apr 2017
      Woodrow, I am sorry my friend but, I would contribute that possibly, to grower error. All plants have different tendencies, and some require a little different treatment. It is not a tendency of quality genetics to wilt. I recommend you […]Read More
  2. By SoFlo918 ,28 Jun 2017
    Just started growing from a rogue seed I found in an oz. I g-13 I picked up from my local supplier. The high this bud gave me was just about perfect. (relaxing with no couch lock, goes great in social […]Read More
  3. By Peter ,30 Jun 2018
    How often do you top the plant?
    1. By latewood_ILGM ,03 Jul 2018
      Peter, Topping is a matter of personal choice and grow experience, as well as techniques and method of growing. This is your choice based on how you want to grow. Sometimes and most of my career I never top.
  4. By Peter ,09 Jul 2018
    When does g13 start flowering

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