If you are grateful that so many good medicinal cannabis strains high in CBD are widely available, you should pay your respects to Cannatonic. Everything started with this exceptional strain.

Indeed, Cannatonic is the strain responsible for the CBD movement in California (USA), Canada, and the UK, more than any other. This unique hybrid cross between the male G13 Haze and the female MK Ultra was specifically bred for a low THC and ultra-high CBD content of 15-19%. As a result, the strain became an instant hit due to its medicinal effects and is a must for all CBD lovers.

Why you should buy Cannatonic feminized seeds:

  • Medicinal benefits of Cannatonic
  • High levels of CBD
  • A relatively small plant that is suitable for indoor growing
  • Considerable yields
  • Long-lasting effects

Growing Cannatonic seeds (indoors and outdoors)

Feminized Cannatonic seeds germinate quickly and can be grown two ways, indoors or outdoors, although a greenhouse is recommended if you're growing in the Northern Hemisphere. This strain is great for growers with medium to high expertise in growing cannabis.

When grown indoors, Cannatonic can develop large yields and grow in a healthy manner. Although the plant is not extremely difficult to grow, some experience is welcome. This is because the plant is more susceptible to mold and should preferably be grown in a controlled environment. That way, the plants will benefit from the proper temperatures and airflow.

You may prefer to use a hydroponic setup for extra high CBD levels, which gives the plants optimal access to all the nutrients they need to produce high CBD levels. Start with a low nutrient level and slowly increase it after the first few weeks of the vegetative phase.


  • We recommend pruning the plant during the growth phase to promote airflow between the plants.
  • Cannatonic needs sufficient space to develop healthily. It is therefore imperative to keep sufficient distance between the plants.

Flowering time

The flowering period is approximately 9 to 10 weeks, after which the plant is ready to be harvested. Cannatonic develops beautiful aromatic ice-green buds with a dense structure, copious amounts of Cannabidiol, and delicious lemon scents during the flowering phase. So take some time to enjoy that properly!

Plant height

Grow Cannatonic feminized seeds, and you will end up with relatively short, manageable plants. Indoor heights fluctuate between 60 to 100 cm. However, this tiny powerhouse only grows a smidge taller outdoors, with heights between 80 to 120 cm.

Cannatonic yield

Cannatonic feminized seeds develop plants with big yields that will not disappoint you, and while many strains produce more weed outdoors than indoors, this is not the case with Cannatonic.

Indoors, maximum yields are between 400 - 500 grams per m², while outdoor growers harvesting in early October can expect maximum yields of 250 - 400 grams per plant.

Effects of Cannatonic

CBD is an active ingredient in cannabis that does not cause a high but is extremely useful in combating pain, insomnia, anxiety, nausea, and epilepsy. However, Cannatonic is so popular because it is non-psychoactive providing users relief while remaining sober, alert, and able to work or perform daily tasks.

The extensive amount of terpenes contributes to the entourage effect of cannabis compounds interacting to generate a more powerful effect. Terpenes are natural compounds from which cannabis derives its distinctive aroma and are also thought to provide health benefits, such as pain relief and anti-inflammatory properties.

Although Cannatonic does not offer a (heavy) cerebral stone, inexperienced smokers, in particular, may experience a slight brightening "head-high." Still, the effect concentrates mainly on the physical parts of the body. This body buzz is quickly noticeable and creates a solid calming feeling. Thanks to its very low THC content, you don't have to worry about becoming anxious or paranoid.

Side effects

Possible side effects of Cannatonic include dry mouth, dry eyes, and headaches.

Smell and taste

Although pine and earthy notes dominate the scent, Cannatonic cannabis has a surprisingly sweet and mild citrus flavor.


Cannatonic was the first strain on the market to provide cannabis plants with a 1:1 ratio THC: CBD. Cannatonic is a 50% Indica and 50% Sativa strain. The genetics of this strain was derived from Reina Madre and NYC Diesel.

The breeders of this strain had Cannatonic tested at "Spannabis" in 2008. According to the test results, the CBD content was unusually high, and fans of medicinal cannabis were elated.

A few years later, in 2013, the market for high CBD strains blossomed when the story of Charlotte Figi hit the mainstream. She had about 300 seizures a week, but after taking CBD, the seizures decreased to 1-2 a week. Before this story, CBD was a relatively unknown cannabinoid to most people.

The best Cannatonic seeds for sale at Weedseedsexpress

Cannatonic is an incredible strain with an incredibly high CBD and low THC content. As you would expect from such a CBD-rich strain, Cannatonic offers a long-lasting, relaxing, and euphoric experience.

If you're interested in growing your weed for medicinal or therapeutic purposes, Cannatonic comes highly recommended. So buy feminized Cannatonic seeds from Weedseedsexpress today.

Read morefold up

Specifications Cannatonic feminized seeds

THC level 5%
CBD level 17%
Variety 50% Indica / 50% Sativa
Genetics G13 Haze x MK Ultra
Max yield indoor 400 to 500 grams/m²
Max yield outdoor 250 to 450 grams/plant
Height indoor 60 to 100 cm
Height outdoor 80 to 120 cm
Flowering time 56 to 70 days
Fungal Resistance Medium
Growersprofile Moderate
Cultivation Indoor, Outdoor, Greenhouse
Climate Temperate, Mediterranean, Arid, Tropical
Flavors Citrus, Earthy, Pine
Effects Calming, Euphoric, Focused, Happy, Relaxed
SOG suitable yes
SCROG suitable yes

Cannatonic feminized strain review

The latest reviews on Cannatonic feminized seeds, do you have experience with this strain? Share your experience with other customers and write a review about the Cannatonic feminized strain.

4 / 5 stars out of 17 reviews


LaGreta C Pringle (Verified customer) 2022-01-09

So far I only tried to germinate 2 Doug Varun seeds the first one I soaked in water and put in a paper towel. That one did not pop. I put the other one directly in the paper towel. Yes, that popped and a tail came out but I've had it in the growing medium for almost two weeks and it has only grown an inch. By now I would have had 3 sets of leaves. I have been growing for years. I am wondering if I need to do something else. Will be germinating another 2 seeds tonight. I just didn't want to germinate all at one time because of the rarity of the strain.

Vincent (Weedseedsexpress) replied on 2022-01-10

Hi LaGreta, Thanks a lot for your review! I am sorry to hear that your first seed did not pop, let us know how the other ones do. Enjoy your grow! Cheers, Vincent

Mark Ashcroft (Verified customer) 2021-05-04

Really nice plant! Good yield and easy to grow, surprisingly dense perfect buds and a mellow high☺️ Good strain for anxiety sufferers👍👍

Cindy Peterson (Verified customer) 2020-05-20

Was happily surprised when I received my order, no problems at all. Great shipping techniques.....haven’t used them yet, still a little cool at night. Next week I will start. Loved the service and all the great information you and your friends had to give. I have recommended your site and services to several of my friends. Thanks again

Agnes (Verified customer) 2019-11-08

I thought the THC would be negligible, but still I got a bit high of this strain. For most people it probably isn't a problem, but I really don't like getting high. I only take the CBD for medical purposes... Frank recommended me to take Sour Tsunami CBD next time if don't wanna any THC.

PinkFlorina (Verified customer) 2019-08-23

Just want to say thinks for your service, secure shipment method and great support team.

AAJ Stith (Verified customer) 2019-05-08

I remember that i had a great chat with Frank who recommended me the Cannatonic. Had grown ACDC and Harlequin before so i can tell you...this strain certainly matches the quality of strains like Harlequin and ACDC.

Erin Lane (Verified customer) 2019-03-28

Although i have germinating my seeds directly in the soil for years with great success, this time was a bit different. Out of 5 only 2 came up so i was a bit disappointed at first. Yet, after reporting my issue via the customer care section Frank send me 5 new extra seeds and a link to their blog about how to germinate the seeds properly. With these methods (soaking in water first for 24 hours) and then applying the paper towel method all my 5 seeds sprouted. The 3 star rating is because of the delay due to the none-germinating seeds. Yet, i would like to give a 5 star rating for your customer care. It just amazing to have found a company who indeed care about their customers, so thank you thank you thank you!

N. Brady (Verified customer) 2019-03-21

I'm a Vet and in chronic pain but this purchased helped me a lot. Cannatonic is pretty easy to grow. Good yields but especially the effect is very good! The very low THC level is almost not noticeable ( i don't like to be high) while the CBD ensures that my entire body relaxes and is painless. Gonna buy some more soon guys.

Francis (Verified customer) 2019-02-21

What a great strain. The seeds where an excellent choice while the plant doesn't grow that large so they where very suitable for my indoor grow. Ive been growing some great healthy plants and really, the weed is amazing. Besides the service at Weedseedsexpress is topnotch! High recommendable!

James S. Hernandez (Verified customer) 2019-01-10

Although breeding a quality CBD strain is generally more difficult, I am a big fan of high CBD strains. My favorites are ACDC, Sour Tsunami CBD and this Cannatonic. All these strains ensure a wonderfully relaxed effect, which is especially pleasant during the day and in the evening before I go to sleep.

Kuntz (Verified customer) 2018-12-25

Good seeds and with the paper towel method i manged to germinate 18 out of 20 seeds, so I think that's a pretty good score.

L. Garcia (Verified customer) 2018-12-10

Although these are good CBD seeds and I can recommend these seeds to anyone who wants to grow a CBD strain, my preference goes to the ACDC. Especially because AC DC possesses more Sativa properties.

Buckley (Verified customer) 2018-11-07

This was the first time I bought CBD seeds and bred a CBD strain, but I think I will never grow anything else anymore. What a beauty of a plant! It is a relatively small plant but certainly one of the nicest I have grown so far. Love to the great support team for WSE. It was a real pleasure buying your seeds.

J. Younger (Verified customer) 2018-09-02

High quality seeds and inexpensive prices. Moreover, the service here is very good. Because a seed did not germinate, I received an extra seed in my last order. Very attentive of customer service. See you guys soon!

Joshua H. (Verified customer) 2018-08-05

Although paying through the website was a bit cumbersome, I received the seeds in good order. Moreover, the communication was good and the employees are helpful. However, I have experienced problems with the germination of the seeds, but perhaps that is because I do this for the first time.

R. Dugan (Verified customer) 2018-07-14

As a medicinal user I had been looking for a strain for a while to use during the day, but because the range at the dispensary is limited, I decided to buy these seeds and grow my own plant. That may have been the best decision ever. The plant develops in a very natural way. Moreover, my weed is now 100% sure organic, the effect is amazing to my body en the taste is lovely citruslike.

Jamison (Verified customer) 2018-06-08

If you are looking for a high quality CBD strain, I can recommend these seeds. It's by far the best CBD strain I have bred and smoked. The effect is so amazing. After a few hits I felt the pain in my body and the worries disappear from my head.

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Payment, shipping & delivery guarantee

What you can expect from us regarding payment, shipping and the delivery guarantee.

We do our utmost to deliver your order as fast as possible, with free shipping worldwide, discreetly packaged and a guaranteed delivery.

  • Free shipping We ship to the United States for free on orders above $100.00

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  • Delivery time - You can expect your order within 15 to 26 business days on average.

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Cannatonic feminized seeds


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