Original Auto Sour Diesel by FastBuds – High-THC Autoflowering Sativa with Gassy Citrus Flavor

Original Auto Sour Diesel by FastBuds is your fast-track ticket to a legendary West Coast high — no green thumb required. This autoflowering powerhouse packs up to 21% THC, a pungent diesel-citrus punch, and a clear-headed, creativity-boosting buzz that keeps you moving all day long.

Struggling with a cluttered grow space and inconsistent results? You’re not alone. Most growers juggle multiple strains, mismatched genetics, and unpredictable yields — especially when chasing that classic Sour Diesel profile. The chaos kills consistency, wastes time, and turns what should be a chill ritual into a stress fest.

Now imagine your setup streamlined: one strain that grows like a champ, smells like a fuel truck, and delivers the same soaring sativa energy you love — without the 12-week wait. No more failed phenotypes, no more weak yields. Just pure, reliable performance from seed to harvest in under 10 weeks.

What Your Grow Space Gains with Auto Sour Diesel

Swap the stress for simplicity. This strain cuts through the noise with sativa vigor and autoflower convenience. You get tall, well-spaced colas with minimal fuss, even in tight spaces. Indoors, it fills the room with that unmistakable sour gas — a head-turner that also turns heads when lit. Outdoors, it soaks up the sun and can blush into stunning purple hues when temperatures drop. Whether you’re in a closet or a greenhouse, this plant adapts and excels.

What You Can Grow with This Autoflowering Powerhouse

One seed, endless potential. Use Auto Sour Diesel to dominate your next indoor run or anchor an outdoor garden. It’s perfect for:

• Daytime sessions that spark ideas and energy
• Outdoor grows in hot, sunny climates
• Extracts and hash — sugar leaves pack serious resin
• Social smoking with friends who appreciate bold flavor
• Beginners wanting a high-impact sativa without the learning curve
• Commercial growers chasing fast turnover and big yields
• Collectors preserving a modern take on a classic lineage

How to Set Up Your Auto Sour Diesel Grow

1. Start with a final pot of 18–27 L (6–7 gal) to avoid transplant stress.
2. Use a light, well-aerated soil or coco mix for strong root development.
3. Apply low stress training (LST) early to control height and boost yields.
4. Feed nutrients progressively, avoiding heavy doses late in flowering.
5. Monitor trichomes — harvest when milky with early amber for peak clarity.
6. Flush 7–10 days before harvest for a smoother smoke and cleaner ash.
7. Trim, dry at 18–22 °C (64–72 °F) and 50–60% RH, then cure 2–4 weeks.

Why Auto Sour Diesel Keeps You in Control

• Harvest in just 9–10 weeks — no waiting, no guessing
• Thrives in heat up to 30 °C (86 °F), perfect for Mediterranean zones
• Reaches 1.20 m (3.94 ft) with strong stems and minimal stretching
• Produces 450–550 g/m² (1.58–1.94 oz/ft²) indoors, up to 217 g/plant (7.65 oz) outdoors
• Resistant to temperature swings and light nutrient fluctuations
• Delivers consistent, uplifting effects without anxiety or couch-lock
• Smells like diesel and citrus — a true terpene heavyweight

Technical specifications

• Breeder / Brand: FastBuds
• Type: Autoflowering
• Dominance: Sativa 65% / Indica 35%
• Genetics / Cross: Sour Diesel Cut × FB Auto #1
• Flowering time: 9–10 weeks from seed
• Yield (indoor): 450–550 g/m² (1.58–1.94 oz/ft²)
• Yield (outdoor): 2–7 oz/plant (56.7–198.45 g/plant)
• Height (indoor): 0.85–1.20 m (2.79–3.94 ft)
• Height (outdoor): 0.90–1.20 m (2.95–3.94 ft)
• Difficulty: Low to medium
• Structure and vigour: Tall, sativa structure with medium internodal spacing and strong branching
• Ideal climate: Hot to moderate; handles cold nights but thrives in heat
• Resistance: Moderate resistance to fungi and pests; resilient in fluctuating conditions
• Training: Suitable for LST and light defoliation; avoid topping
• Recommended pot: 18–27 L (6–7 gal) final pot
• Light: 18–20 h daily throughout cycle
• Temperature: 22–26 °C (71.6–78.8 °F) veg; 20–25 °C (68–77 °F) flower
• Humidity: 50–60% veg; 40–50% flower
• pH: 6.0–6.5 (soil); 5.8–6.2 (coco/hydro)
• THC: Up to 21%
• CBD:
• Aromatic profile: Limonene, myrcene, pinene — citrus, pepper, sandalwood
• Flavour: Citrus, earthy, peppery, sandalwood with sour diesel finish
• Effect: Cerebral, energizing, uplifting — ideal for daytime use

How to grow Original Auto Sour Diesel seeds

FastBuds’ Auto Sour Diesel is a low-maintenance sativa that rewards smart setup and light training.

Quick overview: Autoflowering · FastBuds · 9–10 week cycle · ideal for indoor/outdoor in warm climates.

Safe start: Germinate in a moist paper towel or starter cube at 22–25 °C (71.6–77 °F). Transplant once the taproot is ~1 cm (0.4 in). For faster rooting, Natural Clone de Trabe strengthens early development.

Stable seedling: Keep humidity at 60–70% and light intensity moderate. Water lightly and ensure good drainage. A mycorrhizal booster like BN-Roots - Biomineral root system enhancer - Bio Nova locks in nutrients and prevents deficiencies.

Directed growth: Maintain 18–20 h light. Use LST to spread the canopy and expose lower colas. Feed progressively — this plant likes nutrients but hates late feeding. In coco, Connoisseur Coco Grow A+B pH Perfect growth fertiliser | Advanced Nutrients keeps growth steady and flavor clean.

Efficient flowering: Lower RH to 40–50% and increase airflow. Support heavy colas with stakes. Add a PK booster like PK 50-30 in week 3 of flower for denser buds and higher resin production.

Harvest and refinement: Check trichomes — milky with early amber for energetic highs. Flush 7–10 days pre-harvest. Dry slowly at 18–22 °C (64–72 °F) and 50–60% RH. Cure in jars for 2–4 weeks to enhance flavor and smoothness.

Frequently Asked Questions

How much yield can I expect from Auto Sour Diesel?

Indoors, expect 450–550 g/m² (1.58–1.94 oz/ft²) in a well-managed setup. Outdoors, plants can produce 2–7 oz (56.7–198.45 g) per plant, depending on sun exposure and climate.

Is this strain good for beginners?

Absolutely. It’s forgiving, resistant to stress, and doesn’t require complex training. Just keep light, water, and nutrients balanced, and you’ll be rewarded.

Can I grow it in a cold climate?

It handles cooler nights well but thrives in heat. For colder zones, grow in a greenhouse or bring it indoors during cold snaps.

Does it smell strong during flowering?

Yes — it’s very pungent, with a diesel-citrus aroma. Use a carbon filter like those in Leaf Coat / Spray BioBizz to control odor and protect against mold.

Can I top or prune this autoflower?

Topping isn’t recommended — it can stress the plant and reduce yields. Stick to low stress training (LST) and light defoliation for best results.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Auto Sour Diesel in my 2x2 tent with a 300W LED and 20 L pots. I started two plants, topped one at node 3 — big mistake. It stalled for days. The untopped one flew past it, hitting 115 cm (3.77 ft) and producing 189 g (6.67 oz) of dense, trichome-coated colas. I used LST from week 2, tied down the main stem, and let the side branches take over. Flavor is spot-on: sour citrus up front, then that diesel punch on exhale. The high? Perfect for writing, gaming, or hiking — never anxious, always clear. My pro tip: don’t overfeed in late flower. I skipped week 7 nutrients, and the taste was way smoother. I’ll definitely grow this again — maybe outdoors next time.