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Strain at a Glance
A very fast, 70% indica autoflower from the QCS team with 24% THC and an earthy, sweet aroma. Original QCS genetics, bred by Quebec Cannabis Seeds in Quebec, Canada.
Genetic Balance
balance
Key Information
- THC24%
- CBDLow, under 2%
- GeneticsCritical Mass × Ruderalis
- TasteEarthy • Woody • Berry • Citrus
- Indoor flowering time45–50 days
Specifications
| Strain | Critical Mass Autoflowe |
|---|---|
| Seed type | Autoflower, feminized |
| Genetics | Critical Mass × Ruderalis |
| Genetic balance | Autoflower, 70% indica, 30% sativa |
| THC | 24% |
| CBD | Low, under 2% |
| Taste | Earthy, Woody, Berry, Citrus |
| Indoor flowering time | 45–50 days |
| Yield | Up to 500 g/m² indoors, up to 300 g per plant outdoors |
| Pack size | 5 Graines par Paquet |
These figures are ranges, not promises. Flowering time, harvest date and yield vary depending on growing conditions: the grower, the method and the season's weather. "Mold resistant" means mold tolerant: less prone to mold and slower to be affected. No strain is 100% mold resistant. How we set these numbers →
Taste & Aroma Profile
Earthy and sweet, with subtle hints of wood; reviewers also taste blueberry and citrus with some skunk, and one found the smell “unreal”.
About Critical Mass Autoflowe
Genetics & strain profile
Critical Mass Autoflower is bred by Quebec Cannabis Seeds to combine the effects of Critical Mass with the convenience of an autoflower. It is 70% indica and 30% sativa, with 24% THC and low CBD. It has five reviews averaging 4.6 out of 5. Growers praise the colour in the flowers, a strong smell and well-spaced buds, and one calls it the best of our autos she has tried, with consistent size and lots of flower and flavours like blueberry, citrus and a hint of skunk. Two details are worth knowing before you buy. One grower wanted a small plant and got two tall ones that she had to lower to the floor of the tent, so plan your height. And in one outdoor grow, two of five seeds did not come up while the other three gave a high yield. Our seeds are guaranteed, so if seeds do not germinate, contact us.
How Critical Mass Autoflower grows
Because it is an autoflower, it flowers on its own schedule without a change in light hours. It flowers in just 45 to 50 days, which makes it one of the quicker strains, with up to 500 g/m² indoors and up to 300 g per plant outdoors. Reviewers who counted from seed report harvests at about 8 to 9½ weeks, and one saw the plants still stretching, at around three feet, 17 days into flower; so allow generous headroom, top early or train the branches sideways. The good news from the same reviewers is that the buds stay well spaced, which helps airflow and humidity. Sow into the final pot, keep it on the dry side between waterings, and harvest by trichomes, not the calendar.
Taste, aroma and effect
Earthy and sweet, with subtle hints of wood; reviewers also taste blueberry and citrus with some skunk, and one found the smell “unreal”. The effect is strong and relaxing, in line with the 70% indica side. For the photoperiod relative, see CBD Critical Mass; for other autos, Critical Autoflower and Skunk #1 Autoflower; and for a mix of mostly indica autos, the Indica Auto Mix Pack.
Frequently Asked Questions
How long does Critical Mass Autoflower take to flower?
45 to 50 days of flowering, on its own schedule. Reviewers report harvests at about 8 to 9½ weeks.
How much does Critical Mass Autoflower yield?
Up to 500 g/m² indoors and up to 300 g per plant outdoors.
How strong is Critical Mass Autoflower?
24% THC and low CBD, with a strong, relaxing effect.
How tall does Critical Mass Autoflower get?
Taller than some expect. One grower wanted a small plant and got two tall ones, so allow headroom.
What does Critical Mass Autoflower taste like?
Earthy and sweet with subtle wood, and reviewers add blueberry, citrus and a hint of skunk.
What do customers say about Critical Mass Autoflower?
Five reviews average 4.6 of 5: strong smell, beautiful colours, consistent size and lots of flower.
What are the genetics of Critical Mass Autoflower?
70% indica and 30% sativa, bred by Quebec Cannabis Seeds.
What if my seeds do not germinate?
Our seeds are guaranteed. Contact us and we will sort it out.
Where can I buy Critical Mass Autoflowe seeds in Canada?
Right here at Quebec Cannabis Seeds. Orders ship from Quebec within 24 hours on business days, in plain packaging, across Canada and to the USA, with a germination guarantee.
Order with confidence
- Germination guarantee. If fewer than 80% of your seeds germinate, we send replacement seeds.
- Delivery guarantee. We guarantee delivery of your order.
- Discreet packaging. Plain, unbranded packaging with no logos and no mention of the contents. No signature is required.
- Shipped from Quebec within 24 hours. Orders usually ship the same day or within 24 hours of payment, Monday to Friday. Canada: 3 to 7 days, or 2 to 3 days by Express. USA: 1 to 2 business days by Express. Free shipping on orders over $200.
- Your privacy. We do not sell or share your information with third parties.
- Free seeds with every order, and real people to help: 514-805-2741, Monday to Friday, 11 AM to 6 PM EST.
Details: Shipping · Return policy · FAQs · Privacy policy
- Availability: In Stock
- Model: Q.C.S.
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Manufacturer:
01/08/2025
Holy smokes, this plant is incredible, not only in growth, but it’s got some beautiful colors in the flowers, day 40 in flower, said I wanted small plant, well I got 2 big Critical mass that grew so tall I had to put them on floor of tent.
Most times when directions say ready in 8 weeks, what most say, never turns out, usually longer, but I have patience.
On day 40 the calex are starting to swell, but it seems it just might be ready at day 50, definitely the fasted plant I ever grew.
But if not I have lots of patience now, compared to my start, used to be to excited and cut to early, don’t make that mistake any longer.
Thing is what’s two more weeks, when you have put so much time in it..
This plant I recommend without doubt.
11/07/2025
Ok around 17 days in flower, don’t feel like running to look at journal. But at this time they both are 3 feet tall and still stretching. The buds are well spaced, what I want, buds to large, or to close , I get killed with humidity.
But the plant is totally amazing, unreal smell.
Beautiful plant.
28/06/2025
Wow, what a wonderful grow, no issues all the way so far, she on 4th day of flower and starting to stretch nicely, and she is small, but that’s why I got this type, I don’t want bulk, I want Dankness, heavy hitting. For my injuries.
She is very beautiful and I’m happy I decided on her,
16/04/2023
Best of their autos I've tried consistent size lots of flower and they all had their own flavours of like blueberry citrus with some skunk hints, one really tasted like a skunk berry so I will be buying these again lol finished one at 8 weeks and the others at about 9 1/2
17/09/2022
Great results, 2 seeds didn't pop but the other 3 produced high yield outdoors. Timeline was right on and effects are accurate.