Royal Critical Auto – Fast Autoflowering Cannabis Seeds by Royal Queen Seeds · High Yield, Compact Size & Easy Grow

Royal Critical Auto is a fast, compact, and high-yielding autoflowering cannabis seed that delivers consistent results in just 10–11 weeks from seed to harvest, making it perfect for discreet grows and beginners alike.

Worried your grow might draw attention or get out of hand? With limited space, time, or experience, starting your first cannabis grow can feel overwhelming. You don’t want to waste months on a finicky plant that demands constant attention or ends up smelling up the whole house.

That stress only grows when you’re unsure if your setup is right, if the plant will survive, or if you’ll even get a decent yield. The last thing you need is a tall, stinky, high-maintenance strain that attracts eyes and drains your energy.

Meet Royal Critical Auto — the compact, low-profile powerhouse that grows fast, stays small, and rewards you with up to 400 g/m² indoors or 165 g/plant outdoors. With its subtle aroma during growth and bushy, manageable structure, it’s designed for discretion and control, so you can grow confidently, anywhere.

More Discreet, Less Stress

Standing at just 0.60–1.00 m (2.0–3.3 ft) tall, Royal Critical Auto fits perfectly in tight spaces like closets, cabinets, or small grow tents. Its compact, bushy structure and moderate smell during cultivation mean it won’t dominate your room or alert your neighbors. Whether you're growing indoors or on a balcony, this strain stays under the radar while still delivering impressive yields. Its fast life cycle also means less time in the spotlight — plant it and harvest before anyone even notices.

Control Over the Experience

• Autoflowers in just 10–11 weeks — no need to monitor light cycles
• Reaches a manageable height of 0.60–1.00 m (2.0–3.3 ft)
• Thrives under 24-hour light or 18/6 schedules
• Requires minimal training — responds well to LST
• Delivers consistent, high yields with little effort
• Low odor during growth — ideal for stealth setups
• Easy to maintain with strong resistance to mold and pests

How to Use It Responsibly and Comfortably

Set yourself up for success with a simple, stress-free routine that keeps your plant healthy and discreet.

1. Start seeds directly in 11 L (2.9 gal) pots to avoid transplant shock
2. Provide 18–24 hours of light daily from germination to harvest
3. Use well-draining soil or coco with MYCOPLANT for stronger roots
4. Apply gentle LST in week 3 to boost yield without stress
5. Flush nutrients in the last 2 weeks to enhance flavor and smoothness
6. Keep your grow space ventilated and odor-controlled with a carbon filter if needed
7. Store dried buds in airtight jars to preserve freshness and discretion

Benefits of Having Everything Under Control

• Grow with confidence, even in small or shared spaces
• Enjoy a predictable, low-stress experience from start to finish
• Harvest faster with no need to adjust light schedules
• Feel proud of a solid yield, even as a first-time grower
• Minimize attention and maximize privacy
• Develop a reliable routine you can repeat
• Share your harvest discreetly and comfortably

Technical specifications

• Breeder / Brand: Royal Queen Seeds
• Type: Autoflowering
• Dominance: Indica 50% / Sativa 15% / Ruderalis 35%
• Genetics / Cross: Critical x Ruderalis
• Total days (germination → harvest): 70–77 days
• Yield Indoor: 400 g/m² (12 oz/ft²)
• Yield Outdoor: 115–165 g/plant (4–5.8 oz/plant)
• Height Indoor: 60–100 cm (24–39 in)
• Height Outdoor: 90–150 cm (3–5 ft)
• Difficulty: Low
• Structure and vigour: Bushy, sturdy, strong branching
• Resistance: High resistance to mold, pests, and temperature fluctuations
• Training: Suitable for LST, not recommended for topping or FIM
• Recommended pot: 11–18 L (2.9–4.8 gal) final pot
• Light: 18–24 h/day throughout the cycle
• 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/hydro)
• Smell in grow: Low to moderate
• THC: 14%
• CBD: Low
• Flavour: Candy, fruity, pepper
• Effect: Euphoric, giggly, relaxing — ideal for daytime or social use

How to grow Royal Critical Auto seeds

Get the most out of your Royal Critical Auto with a simple, beginner-friendly grow plan that maximizes yield and discretion.

Quick overview: Autoflowering · Royal Queen Seeds · 10–11 week cycle · Low difficulty · Ideal for small indoor spaces or balcony grows.

Safe start: Germinate seeds in a moist paper towel at 22–25 °C. Transplant once the taproot is ~1 cm long. For faster rooting, Clon Fix strengthens early development.

Stable seedling: Keep humidity at 60–70% and provide gentle light. Use airy soil with MYCOPLANT to boost root health and prevent damping-off.

Directed growth: Maintain 18–24 hours of light daily. Water moderately and avoid overfeeding — this strain thrives on simplicity. Apply LST in week 3 to open up the canopy and increase light exposure.

Efficient flowering: Reduce humidity to 40–50% and ensure good airflow. Support heavy colas if needed. In the final two weeks, flush with plain water to improve taste and smoothness.

Harvest and refinement: Harvest when trichomes are mostly milky with some amber for a balanced effect. Dry slowly at 18–22 °C and 50–60% RH. Cure buds in jars for 2–4 weeks to enhance flavor and smoothness.

Frequently Asked Questions

How discreet is Royal Critical Auto?

Very discreet. It stays short, grows fast, and produces only a mild odor during cultivation, making it perfect for small spaces or shared homes.

Can I grow it outdoors in a cold climate?

Yes. Royal Critical Auto is resilient to temperature fluctuations and can thrive in temperate or Mediterranean climates. Just protect it from heavy rain and frost.

Does it need a lot of nutrients?

No. This strain prefers a light feeding schedule. Overfeeding can harm it, so start low and go slow, especially in coco or hydro setups.

Is it good for beginners?

Absolutely. With its fast cycle, high resistance, and minimal training needs, it’s one of the best autoflowers for first-time growers.

When should I harvest?

After 10–11 weeks, check trichomes. Harvest when they’re mostly milky for a euphoric high, or wait for more amber for a more relaxing effect.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown Royal Critical Auto three times now — once in my first tent, once on my balcony, and once as a test against a photoperiod strain. Every time, it surprised me with how little it needed and how much it gave back. I used 11 L pots, plain BioBizz soil, and just one round of LST. No fancy nutrients, no topping, no drama. It stayed under 90 cm (2.95 ft), barely smelled, and yielded 145 g (5.1 oz) of dense, trichome-covered buds. The high was smooth, giggly, and social — perfect for chilling with friends. If I had to recommend one strain for someone starting out, this would be it. It’s like the Toyota Corolla of cannabis — not flashy, but bulletproof.