Auto Blue Pyramid
Cannabis seeds
by Pyramid Seeds
Auto Blue Pyramid Cannabis Seeds by Pyramid Seeds
Auto Blue Pyramid is a feminized autoflowering cannabis seed from Pyramid Seeds that packs 24% THC into a plant you can harvest in just 60 days from germination. No light schedule changes, no male plants to pull, no extended flowering windows — drop the seed, keep it watered, and watch a compact 40–90cm plant stack up resinous buds that rival photoperiod genetics twice its size. With 1.4% CBD and 0.3% CBN rounding out the cannabinoid profile, this is one of the most complete autos we've stocked in a while.
Why Auto Blue Pyramid Deserves Your Grow Space
Most autoflowers make you choose: speed or potency. Auto Blue Pyramid doesn't ask you to compromise. At 24% THC, it sits comfortably alongside photoperiod strains that take twice as long to finish. The original Blue Pyramid built its reputation on dense, resinous flowers and a cannabinoid profile that goes beyond just THC — and Pyramid Seeds managed to carry that over into an auto format without gutting the numbers.
We've watched the autoflower market shift over the past few years. The early autos were novelty items — fast, sure, but the yields were disappointing and the potency was a step down. That generation is gone. Auto Blue Pyramid yields up to 400–500g, which is serious weight for a plant that tops out at 90cm. The 1.4% CBD adds a secondary cannabinoid layer — CBD is the most widely studied non-intoxicating cannabinoid in cannabis, often associated with a smoother overall experience. The 0.3% CBN, a minor cannabinoid typically found in aged cannabis, rounds things out further.
The honest limitation? Height variability. You might get a 40cm plant or a 90cm plant from the same pack — genetics, environment, and pot size all play a role. If you're growing in a micro setup (think PC case or small cupboard), that 90cm upper range could catch you off guard. In a standard tent, though, this compact profile is an advantage: you can fit more plants per square metre and still get proper light penetration without heavy training.
Auto Blue Pyramid Specifications
| Spec | Value |
|---|---|
| Seed Bank | Pyramid Seeds |
| Type | Autoflowering, Feminized |
| Genetics | Blue Pyramid Auto |
| THC Content | 24% |
| CBD Content | 1.4% |
| CBN Content | 0.3% |
| Plant Height | 40–90 cm |
| Seed-to-Harvest Time | 60–67 days |
| Yield | Up to approx. 400–500g |
| Seeds per Pack | 5 feminized seeds |
Auto Blue Pyramid Compared to Photoperiod Blue Pyramid
If you already know the original Blue Pyramid, here's how the auto version stacks up. The photoperiod Blue Pyramid is listed by Pyramid Seeds at around 9–10% THC with a 55-day indoor flowering time — but that 55 days doesn't count the vegetative phase, which adds another 4–6 weeks depending on how long you veg. Auto Blue Pyramid finishes the entire cycle — seed to chop — in 60–67 days total, and it does it at a reported 24% THC. The trade-off is control: with a photoperiod, you decide when to flip to flower, you can train and top more aggressively, and you can take clones. With the auto, the plant runs on its own internal clock. Less control, but dramatically less work.
| Feature | Auto Blue Pyramid | Photoperiod Blue Pyramid |
|---|---|---|
| THC | 24% | ~9–10% |
| Total Grow Time | 60–67 days | ~95–110 days (veg + flower) |
| Light Schedule | 18/6 or 20/4 throughout | 18/6 veg, 12/12 flower |
| Height | 40–90 cm | Taller, strain-dependent |
| Cloning | Not practical | Yes |
| Yield | Up to 500g | Up to 500g+ |
How to Grow Auto Blue Pyramid Seeds
- Germinate your seeds using the paper towel method or by placing them directly into a small pot of moist, light soil or coco coir. Keep the environment warm — around 22–25°C — and you should see taproots within 24–72 hours.
- Plant the germinated seed about 1cm deep, taproot facing down. Use a final pot from the start — autos don't love being transplanted because the stress can stunt growth during their short life cycle. An 11–15 litre fabric pot is the sweet spot for most growers.
- Set your light schedule to 18 hours on, 6 hours off. Some growers run 20/4 for extra growth. Unlike photoperiods, Auto Blue Pyramid doesn't need a 12/12 flip to trigger flowering — it'll start on its own around week 3–4.
- Feed lightly during the first two weeks — seedlings don't need much. Once you see the first true leaves, introduce a mild vegetative nutrient at half strength. Switch to bloom nutrients when you spot the first pistils.
- Watch your watering. Overwatering is the single most common mistake we see with autos, especially in the early stages. Let the top 2–3cm of soil dry out between waterings. The plant is small, the pot is big — it doesn't drink as much as you think it does.
- Harvest when 60–67 days have passed from germination and the trichomes have shifted from clear to milky-white. A cheap jeweller's loupe (30x–60x magnification) is all you need to check. Don't rush this step — a few extra days at the end can make a noticeable difference in the final product.
Running Auto Blue Pyramid indoors? Pair it with a complete grow tent kit — tent, light, ventilation, and carbon filter sorted in one go. If you're after a different autoflower to run alongside it, Auto Tutankhamon from Pyramid Seeds is another high-THC option that finishes on a similar timeline.
Frequently Asked Questions
How much yield can I realistically expect from Auto Blue Pyramid?
Pyramid Seeds lists up to 400–500g, but that's under optimal conditions — strong lighting, proper nutrients, good airflow. In a well-run indoor tent with a 600W equivalent LED, 300–400g per square metre is a realistic target. Outdoors in a warm climate, individual plants can produce 50–100g each.
Can I top or train Auto Blue Pyramid?
Low-stress training (LST) works well — gently bending stems to open up the canopy improves light distribution without stressing the plant too much. Topping is riskier with autos because the recovery time eats into a growth cycle that's already short. If you're experienced and your plant is healthy by day 14–18, a single top can work. If in doubt, stick to LST.
Does Auto Blue Pyramid actually reach 24% THC?
24% is the figure from Pyramid Seeds' own data sheet, and it represents the genetic potential under ideal conditions. Your actual THC percentage depends on light intensity, nutrient management, and harvest timing. Even if you land at 18–20%, that's still well above average for an autoflower.
What does the 1.4% CBD and 0.3% CBN mean in practice?
These are secondary cannabinoids that contribute to the overall cannabinoid profile. CBD is the most widely researched non-intoxicating cannabinoid in cannabis, while CBN — a minor cannabinoid that forms as THC degrades — is present in smaller amounts. Together with the 24% THC, they create a broader chemical profile than a THC-only strain.
How long does blue colouration last after harvest?
Blue and purple hues in cannabis come from anthocyanins — pigments that develop when night temperatures drop below about 15°C during late flower. If your Auto Blue Pyramid develops colour, it typically holds through drying and curing. The colour is cosmetic and doesn't directly affect potency or flavour.
Do I need to change the light schedule for Auto Blue Pyramid?
No. That's the whole point of an autoflower. Run 18 hours on and 6 hours off from seed to harvest. Some growers use 20/4 for slightly more growth. Unlike photoperiod strains, you never need to switch to 12/12 — the plant flowers automatically based on age, not light cycle.
Is Auto Blue Pyramid a good choice for first-time growers?
Yes — it's one of the best autos for beginners. No light schedule changes, no male plants to identify, and a short 60–67 day cycle means you see results quickly and learn fast. The compact 40–90cm height fits small spaces easily. Just watch your watering in the first two weeks and you'll be fine.
Last updated: April 2026
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Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.