Sweet Trainwreck Auto by Sweet Seeds – Fruity Autoflowering Hybrid for Easy, High-Yielding Grows

Sweet Trainwreck Auto by Sweet Seeds is a fast, robust autoflowering hybrid that delivers high-quality, flavorful buds in just 8 weeks from seed to harvest, making it a top choice for growers who want big results without the wait.

Are You Still Stuck with Slow, Complicated Grows?

Most autoflowering strains promise speed but fall short on flavor, potency or yield—leaving you with average results and wasted time. You end up juggling multiple plants, dealing with weak branches, or settling for bland smoke that doesn’t hit right.

Why Settle for Less When You Can Grow Smarter?

Limiting yourself to basic autos means missing out on the full experience: rich terpene profiles, strong effects, and serious yields—all in a compact, low-maintenance plant. Sticking with underperforming genetics leads to more work, less reward, and a grow that feels more like a chore than a joy.

The All-in-One Autoflower That Does It All

Sweet Trainwreck Auto isn’t just fast—it’s complete. With elite Trainwreck lineage crossed with resilient Ruderalis, it thrives indoors and outdoors, adapts to beginner and expert techniques, and delivers a powerful, balanced high with a mouthwatering citrus-sweet flavor. Whether you’re growing in a closet or a backyard, this strain maximizes your space, time, and harvest quality without demanding perfection.

Indoor Growing: Big Yields in Tight Spaces

Perfect for stealth grows, Sweet Trainwreck Auto stays compact at 0.60–1.00 m (2.0–3.3 ft) but packs a punch with dense, trichome-covered buds. Under a 400W HPS or modern LED, you’ll see yields of 350–550 g/m² (12.3–19.4 oz/ft²) in just 8 weeks. Its sativa-leaning structure responds well to light LST (low-stress training), letting you maximize light exposure without risking stress. Keep temps between 22–26 °C and humidity at 50–60% in veg, dropping to 40–50% in flowering to prevent mold. For a strong start, Seedbox Plagron boosts germination and root resilience.

Outdoor Growing: Sun-Loving & Storm-Ready

Outdoors, this auto reaches up to 1.20 m (3.94 ft) and produces 40–120 g/plant (1.4–4.2 oz/plant), thriving in Mediterranean or temperate climates with plenty of sun. It’s naturally resistant to mold and pests, making it ideal for rainy seasons or humid areas. Plant in a 20–27 L pot with a mix of coco coir and worm humus for optimal drainage and root health. Thanks to its Ruderalis genes, it flowers automatically regardless of light cycle, so you can plant it any time from spring to early summer in the Northern Hemisphere. For sustained growth, Medi One organic fertiliser supports strong development without overloading the plant.

How to Choose the Best Setup for You

Whether you're a stealth grower, a beginner, or a sun-chaser, Sweet Trainwreck Auto adapts to your style. Here’s how to pick your path:

• If you’re short on space or want discretion, go indoor with LST and strong lighting.
• If you love natural cycles and big yields, grow outdoors in full sun with organic soil.
• If you’re new to growing, this strain’s forgiving nature and fast cycle make it ideal.
• If you’re experienced, push it with advanced nutrients and training for maximum output.

Advantages and benefits that show up in every case

• Ready to harvest in just 8 weeks from germination
• Produces up to 550 g/m² or 120 g/plant with minimal effort
• Delivers a euphoric, creative high with full-body relaxation
• Boasts a sweet, citrusy flavor with hashy undertones
• Stays compact and discreet, perfect for small spaces
• Resists mold and pests thanks to strong genetics
• Easy to grow—ideal for beginners and experts alike

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Autoflowering
• Dominance: Balanced Indica/Sativa hybrid
• Genetics / Cross: Trainwreck × Ruderalis
• Cycle: 8 weeks from germination to harvest
• Indoor yield: 350–550 g/m² (12.3–19.4 oz/ft²)
• Outdoor yield: 40–120 g/plant (1.4–4.2 oz/plant)
• Indoor height: 0.60–1.00 m (2.0–3.3 ft)
• Outdoor height: 0.60–1.20 m (2.0–3.94 ft)
• Difficulty: Low
• Structure and vigour: Branching, sativa-like structure with strong lateral growth
• Ideal climate: Temperate, Mediterranean
• Resistance: High resistance to mold, pests, and stress
• Training: Suitable for LST, not recommended for topping or FIM
• Recommended pot: 18–27 L final pot
• Light: 18–20 h/day all 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: High – use a carbon filter if needed
• THC: 20%
• CBD: 1%
• Aromatic profile: Limonene, myrcene, pinene
• Flavour: Sweet, citrus, lemon, earthy hash
• Effect: Balanced cerebral and body high – uplifting, energizing, mood-enhancing

Frequently Asked Questions

Can I grow Sweet Trainwreck Auto in a small tent?

Yes, it’s perfect for 60x60x160 cm tents. Use LST to spread the canopy and a 250W LED for best results.

Does it need a lot of nutrients?

No, it’s not a heavy feeder. Start low and increase gradually. Organic inputs work great.

When should I harvest?

After 8 weeks, check trichomes: clear to milky means energetic high; milky to amber means more relaxing effect.

Can I use it for medical purposes?

Many users report it helps with stress, mood, and focus, but we don’t make medical claims. Use responsibly.

What should I pair it with for better flavor?

Use Silica Power booster in flowering to strengthen cell walls and enhance terpene production.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown a lot of autos, but Sweet Trainwreck Auto stands out. I tested it in my balcony garden—full sun, coastal humidity, zero grow tent. Planted in 20L fabric pots with a coco-soil mix, it handled everything: wind, rain, even a heatwave. At 8 weeks, I harvested 95 grams per plant—dense, sticky buds with a smell so strong I had to open the windows. The high? Pure joy. It starts with a tingle in your toes, climbs up your spine, and drops you into a happy, talkative headspace while your body chills. I’ve shared it with friends who said, “This hits like a photoperiod.” My tip: don’t over-prune. Let it do its thing. And if you want more resin, add a bloom booster in week 5. This one’s a keeper.