Auto Critical Mass by Advanced Seeds – Fruity Autoflower with High Resin & Easy Growth

Auto Critical Mass by Advanced Seeds is a powerhouse autoflower that turns your grow space into a high-yield factory in under 10 weeks, delivering dense, resin-coated buds with minimal effort.

Still stuck with slow, finicky strains that barely pay off your electricity bill? What if you could harvest top-shelf bud in just nine weeks—without the stress of light switches or fragile genetics? Meet the strain that’s rewriting the autoflower rulebook.

Fast Harvest, Big Returns, Zero Drama

Most autoflowers promise speed but skimp on quality. You end up with wispy buds, weak flavor, and a harvest that doesn’t justify the time. Worse, some collapse under mild stress or get wiped out by a hint of mold. That’s not growing—it’s gambling.

Now imagine a plant that goes from seed to harvest in 60–70 days, laughs at pests, and packs buds so dense they bend the branches. Auto Critical Mass doesn’t just grow fast—it grows smart. With genetics rooted in the legendary Critical Mass and Skunk #1, it’s built to produce, not just survive.

With Auto Critical Mass, you’re not buying seeds—you’re investing in consistency. This is the strain that fills your stash jar in record time, rewards beginner growers with pro results, and keeps experienced cultivators coming back harvest after harvest.

What You Get from Day One to Drying Rack

From the first sprout to final cure, Auto Critical Mass keeps things simple and satisfying. It grows compact but strong, hits hard with flavor, and delivers a relaxing buzz that sticks. Whether you're in a closet or a backyard, this strain adapts and outperforms.

• Reaches 0.60–0.90 m (1.97–2.95 ft) indoors, perfect for stealth setups
• Stretches to 0.90–1.40 m (2.95–4.59 ft) outdoors with solid lateral branching
• Produces up to 500 g/m² (17.64 oz/ft²) indoors under strong light
• Delivers medium to high yields per plant outdoors, especially in sunny climates
• Matures in just 9–10 weeks from seed—no waiting, no guesswork
• Thrives in SOG or screen setups thanks to its sturdy, bushy structure

Compact Design, Maximum Efficiency

Auto Critical Mass is engineered for efficiency. Its short stature and tight internodal spacing make it ideal for limited spaces, while its rapid flowering cycle maximizes annual turnover.

• Type: feminized autoflowering
• Genetics: Critical Mass × Ruderalis Skunk
• Indica/sativa ratio: indica-dominant hybrid
• Flowering time: 55–60 days from germination
• Harvest window (outdoor, Northern Hemisphere): October–November
• THC: 16% | CBD: low
• Terpene profile: myrcene, ocimene – responsible for sweet, berry, and woody notes
• Resistance: high resistance to mold and pests, ideal for humid environments
• Training: responds well to LST and light defoliation; avoid topping
• Recommended pot size: 18–27 L (5–7 gal) final pot for optimal root development

Smart Growth, Bigger Harvests, Better Value

• Delivers pro-level yields without pro-level effort—perfect for beginners
• Short life cycle allows 3–4 indoor harvests per year
• High resin production boosts extraction potential and potency
• Consistent performance across soil and coco substrates
• Low odor during grow—ideal for discreet cultivation
• Stable genetics mean every seed performs like the last
• Resists stress from temperature swings and minor nutrient imbalances
• Requires no light cycle changes—18–20 hours of light throughout

Pro Tips to Maximize Your Yield Without Overspending

Auto Critical Mass rewards smart growing—not big budgets. A few strategic moves can double your return without doubling your costs.

• Start in the final pot to avoid transplant shock and save time
• Use a well-aerated soil mix with organic amendments for steady nutrition
• Apply light LST early to open up the canopy and boost light penetration
• Add a root stimulator like Trabe Ultrahemp during germination for faster establishment
• Switch to a bloom booster like Dutch Formula Micro 3 in mid-flowering for denser buds

Frequently Asked Questions

How long does Auto Critical Mass take from seed to harvest?

Approximately 60–70 days, depending on environment. Indoors, you can expect harvest in about 10 weeks. Outdoors, it’s ready in 10–11 weeks from sprouting.

Is Auto Critical Mass good for beginners?

Absolutely. It’s easy to grow, forgiving of minor mistakes, and resistant to common issues like mold and pests—ideal for first-time growers.

How much yield can I expect outdoors?

Yields vary by conditions, but each plant can produce a solid medium to high harvest, especially with 5–6 hours of direct sun and proper care.

Does it need special nutrients?

No. It performs well with standard cannabis nutrients. Use a balanced grow formula and switch to bloom in flowering. For best results, pair with Pro Organic Grow for a natural, flavor-rich finish.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve tested dozens of autoflowers, but Auto Critical Mass stands out for its reliability. I grew it in a 20 L pot under a 600W LED, 18/6 cycle, and it filled the screen in just three weeks. The smell? Sweet berries with a skunky kick—clean and inviting. I didn’t top it, just used light LST, and still got 480 g (16.93 oz) from a single plant. What impressed me most was how it handled a humidity spike—no mold, no stretch. If you want a strain that pays for itself fast and tastes like it costs more, this is it. My tip: don’t overfeed it. Let the genetics do the work.