Critical + 2.0 Auto by Silent Seeds – High-Yielding Autoflower with Skunk & Lemon Aroma

Critical + 2.0 Auto by Silent Seeds is a premium autoflowering strain that delivers massive harvests of potent, aromatic buds in record time, combining the legendary Critical + genetics with modern auto stability for a grow that’s fast, easy, and highly rewarding.

Stuck between slow harvests and weak yields?

Most autoflowers promise speed but fall short on production or quality. Others take forever just to flower, wasting time and energy while you wait for a mediocre return.

Why settle for half the experience?

Imagine waiting 10 weeks only to clip small, airy buds with faint flavor. Or worse—pushing a plant too hard and watching it stretch out of control. That’s the reality for too many growers chasing convenience over quality.

Critical + 2.0 Auto delivers speed and power in one compact package

This isn’t your average auto. With yields up to 700 g/m² indoors and 300 g per plant outdoors, it outperforms most photoperiods while finishing in just 70–80 days from seed. Its Skunk-dominant aroma hits hard with fresh lemon and spice, and the 17–22% THC delivers a deeply relaxing, long-lasting Indica effect—perfect for unwinding after a long day.

What it’s like to grow Critical + 2.0 Auto solo

When you're flying solo, simplicity is king. This strain respects your time and space. It grows compact and bushy—reaching just 0.80–1.10 m (2.62–3.61 ft)—making it ideal for stealth grows or tight indoor setups. With minimal training needed, it thrives under 18–20 hours of light, delivering consistent results without babysitting. Whether you're in a closet or balcony, it adapts fast and performs hard.

What changes when you grow with others

Shared grows mean shared expectations. With Critical + 2.0 Auto, everyone wins. Its uniform growth and high yield mean no jealous eyes over uneven harvests. Plant a few in 20 L pots and you’ll have enough dense, fragrant buds to go around—without the stress of mold or pests. Thanks to its resistance to humidity and fungi, it holds up well in group environments where airflow or timing might not be perfect.

Advantages and benefits in both solo and shared grows

• Harvests in just 70–80 days—no long waits
• Yields up to 700 g/m² indoors or 300 g per plant outdoors
• Compact size fits discreet or small-space grows
• Stable, homogeneous plants ensure consistent results
• Resistant to mold, pests, and temperature swings
• Intense Skunk-lemon aroma with spicy undertones
• Powerful, relaxing Indica effect perfect for evening use

Tips for choosing how and with whom to grow it

Critical + 2.0 Auto shines in different ways depending on your setup and crew. Here’s how to get the most out of it:

• Grow solo for full control and a fast, private harvest
• Share with trusted growers for a bigger collective yield
• Use 20 L pots for maximum root development and yield
• Keep lighting at 18–20h/day—no need to switch
• Harvest when trichomes turn milky to amber for peak relaxation

Technical specifications

• Breeder / Brand: Silent Seeds
• Type: Autoflowering, Feminized
• Dominance: 70% Indica / 30% Sativa
• Genetics: Critical + Auto × Critical + (Bx S1)
• Total cycle: 70–80 days (seed to harvest)
• Indoor yield: 450–700 g/m² (1.6–2.5 oz/ft²)
• Outdoor yield: 100–300 g/plant (3.5–10.6 oz/plant)
• Indoor height: 80–110 cm (2.62–3.61 ft)
• Outdoor height: up to 1.20 m (3.94 ft)
• Difficulty: Low to medium
• Structure: Bushy, short internodal spacing
• Resistance: High resistance to mold, pests, and cold
• Training: Suitable for LST; avoid topping or FIM
• Recommended pot: 20 L final pot
• Light: 18–20 h/day throughout
• THC: 17–22%
• CBD: 0.01–0.2%
• Aromatic profile: Skunk, lemon, pine, spice
• Effect: Relaxing, physical, long-lasting

How to grow Critical + 2.0 Auto for best results

Designed for speed and resilience, this auto thrives with minimal stress and smart inputs.

Quick overview: Autoflower · Silent Seeds · 70–80 day cycle · Low-medium difficulty · Ideal for indoor closets or outdoor balconies.

Safe start: Germinate in a moist, dark environment at 22–25 °C. Transplant once the taproot is ~1 cm long. For a stronger start, HESI Root Complex boosts early root development and reduces shock.

Stable seedling: Keep humidity at 60–70% and use a light, aerated substrate. Water sparingly. A mix with 30% coco improves drainage and root zone oxygen.

Directed growth: Maintain 18–20h light. Avoid aggressive pruning—this auto grows fast and hates stress. Use 20 L pots early to support flowering. Soil Nutrition A+B provides balanced feeding without overloading.

Efficient flowering: Lower humidity to 40–50%. Ensure good airflow to prevent mold. In mid-flower, Sensi Bloom A+B Advanced Nutrients enhances resin and bud density.

Harvest and refinement: Harvest when trichomes are mostly milky with some amber. Flush 7–10 days before cut. Dry at 18–22 °C and 50–60% RH. Cure for 2–4 weeks in jars for maximum flavor.

Frequently Asked Questions

Can I top or prune Critical + 2.0 Auto?

No. Autoflowers don’t recover well from stress. Stick to gentle LST (low-stress training) if needed, but avoid topping, FIM, or aggressive defoliation.

How many plants per m² should I grow?

For maximum yield, plant 9–12 per m² indoors. Use 20 L pots for full development. In SOG setups, 16 plants/m² works if pots are smaller.

Does it smell strong during flowering?

Yes, it has a powerful Skunk-lemon aroma. If discretion is key, use a carbon filter like those in our grow shop to control odor.

Is it good for beginner growers?

Absolutely. It’s forgiving, fast, and resistant to common issues like mold and pests—perfect for first-time growers wanting serious results.

Can I grow it outdoors in colder climates?

Yes. Thanks to its Ruderalis heritage, it tolerates cooler temps and shorter summers. Harvest by late September in the Northern Hemisphere.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown a lot of autos, but Critical + 2.0 Auto stands out. I ran it in a 60x60x160 cm tent with a 300W LED—just one plant in a 20L pot. No topping, no fancy tricks. I used a light soil mix with perlite and fed it regularly with a balanced A/B nutrient. By day 75, I had a monster plant, 105 cm tall, covered in sticky, trichome-rich buds. The smell during drying was insane—pure Skunk with a zesty lemon kick. I shared the harvest with friends, and everyone agreed: this is one of the most relaxing smokes we’ve had all year. For solo grows, it’s unbeatable. For group setups, plant three and you’ll have more than enough. My only tip? Don’t overwater—let the soil dry slightly between waterings.