Critical Mass Feminized Seeds by Advanced Seeds – High-Yielding Indica Hybrid for Massive Harvests

Critical Mass feminized seeds by Advanced Seeds are your shortcut to heavy harvests of top-shelf, resin-coated buds—fast, easy, and reliable, just like the legends say.

Still wrestling with weak yields and endless waits for harvest? You’re not alone. Most strains promise big but fall short when it counts. They stretch too much, take forever to flower, or collapse under mild stress—leaving you with half-empty jars and wasted effort.

Now imagine a plant that laughs at bad weather, finishes early, and bends to your grow style—whether you’re running a tight indoor SOG or a sun-drenched outdoor plot. A strain that doesn’t just survive… it dominates. That’s Critical Mass.

How Critical Mass Delivers Maximum Yield in Minimum Time

Bred from powerhouse Afghan and Skunk genetics, Critical Mass is built for abundance. Its bushy, indica structure supports massive colas that swell with resin, turning into hard, bright buds that’ll make your drying rack groan. Indoors, it stays manageable at 0.70–1.00 m (2.30–3.28 ft), perfect for stealth grows, while outdoors it can soar to 1.80–2.50 m (5.91–8.20 ft) and produce over 2.5 kg (5.51 lb) per plant under ideal conditions. With a flowering time of just 45–50 days, you’re looking at one of the fastest high-yield cycles on the market.

Simple Steps to Grow Critical Mass Like a Pro

1. Start with a well-aerated, nutrient-rich substrate to support its vigorous root system.
2. Use low-stress training (LST) early to open up the canopy and boost light penetration.
3. Maintain humidity at 50–60% during veg and drop to 40–50% in flowering to prevent mold.
4. Switch to a bloom-focused nutrient regimen like Bud Booster Green Planet to fuel resin and bud density.
5. Harvest when trichomes turn milky to amber for a deeply relaxing effect.

Advantages and Benefits You Can’t Ignore

• Yields up to 650 g/m² (23 oz/ft²) indoors—massive returns in record time
• Thrives in SOG and SCROG setups, maximizing space and light efficiency
• Robust genetics resist mold, pests, and temperature swings—ideal for beginners
• Sweet, pungent aroma with fruity and citrus notes that lingers on the palate
• Potent THC levels up to 22% deliver a balanced high—relaxing without locking you to the couch
• Perfect for extraction thanks to its heavy resin production

Tips for a Smooth, Stress-Free Grow

Keep your Critical Mass happy by avoiding overwatering—let the topsoil dry slightly between irrigations. Use a final pot size of 11–20 L depending on space and desired height. For odor control indoors, pair it with a carbon filter—this strain doesn’t whisper. And if you’re growing outdoors, plant in nutrient-rich soil with plenty of root room to unleash its full potential.

Technical specifications

• Breeder / Brand: Advanced Seeds
• Type: Feminized
• Dominance: Indica-dominant hybrid (70% Indica)
• Genetics / Cross: Skunk #1 × Afghan
• Flowering time (indoor): 45–50 days (8–9 weeks)
• Harvest (outdoor): Late September (Northern Hemisphere)
• Indoor yield: 550–650 g/m² (19–23 oz/ft²)
• Outdoor yield: Up to 2.5 kg/plant (5.51 lb/plant)
• Indoor height: 0.70–1.00 m (2.30–3.28 ft)
• Outdoor height: 1.80–2.50 m (5.91–8.20 ft)
• Difficulty: Low
• Structure and vigour: Bushy, compact, high branching
• Ideal climate: Temperate, Mediterranean
• Resistance: High resistance to mold, pests, and stress
• Training: Suitable for LST, SCROG, topping, and FIM
• Recommended pot / substrate: 11–20 L final pot; soil or coco with good aeration
• Light: 18/6 (veg) → 12/12 (flowering)
• Temperature: 22–26 °C veg / 20–25 °C flowering
• Humidity: 60–70% seedling / 50–60% veg / 40–50% flowering
• pH: 6.0–6.5 (soil) / 5.8–6.2 (coco)
• Smell in grow: High – use carbon filter recommended
• THC: Up to 22%
• Aromatic profile: Sweet, fruity, skunky, citrus
• Flavour: Sweet, complex, with ripe fruit and citrus undertones
• Effect: Balanced body relaxation with euphoric mental lift – ideal for evening use

Frequently Asked Questions

How long does Critical Mass take to flower?

Indoors, Critical Mass flowers in just 45–50 days. Outdoors, it’s ready for harvest in late September in the Northern Hemisphere.

Is Critical Mass good for beginners?

Absolutely. Its resilience, fast cycle, and forgiving nature make it a top choice for novice growers.

Does Critical Mass need a lot of nutrients?

It’s a heavy feeder, especially in flowering. Use a quality bloom booster like Bud Booster Green Planet to maximize yield and resin.

Can I grow Critical Mass outdoors in a colder climate?

Yes. Its Afghan heritage gives it strong resistance to cooler temperatures and humidity, making it suitable for less ideal conditions.

Why is it called Critical Mass?

Because it delivers massive yields of dense, resinous buds—critical in every sense of the word.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown Critical Mass for years, and it’s still one of my go-to strains when I want guaranteed results. I ran it in a 1.20 x 1.20 m (4 x 4 ft) tent with 6 plants in 11 L pots using the SOG method. I topped them once early in veg and used LST to spread the canopy. With HESI Power Zyme in the feed, the roots stayed clean and strong. Flowering was smooth—no stretch, no deficiencies. I harvested in 48 days with sticky, rock-hard buds. The high is deeply relaxing but clear-headed, perfect after a long day. If you want a strain that performs every time, this is it.