Auto Biodiesel Mass XXL by Advanced Seeds – High-Yield Autoflower with Citrus Diesel Aroma

Auto Biodiesel Mass XXL by Advanced Seeds is a high-yield autoflowering strain that delivers up to 500 grams per square meter in just 60 to 70 days, featuring a zesty citrus-diesel aroma and a balanced 17% THC effect perfect for daily enjoyment.

Worried your first autoflower won’t live up to the hype? That you’ll invest time and space only to end up with weak buds, low resin, or a flavorless harvest? It’s a common fear — especially when you’re counting on a big return from limited space or a tight schedule. The pressure to get it right can make you second-guess every decision, from lighting to nutrients, leaving you stuck in analysis paralysis.

That hesitation only leads to missed opportunities. You might play it too safe, never pushing the plant to its full potential. Or worse, you skip growing altogether, letting your setup gather dust while others enjoy bountiful harvests. That fear turns into frustration — watching your dream of a personal, consistent supply fade into 'maybe next time.'

Auto Biodiesel Mass XXL is your shortcut past the trial-and-error grind. Bred for resilience and explosive production, it’s designed to thrive even if you’re still mastering the basics. With genetics refined over generations, this strain handles common mistakes like overwatering or minor nutrient imbalances, letting you learn by doing — not by failing. Pair it with the right tools, and you’ll go from anxious beginner to confident grower in a single cycle.

What to Expect in the First Few Weeks

From day one, Auto Biodiesel Mass XXL shows vigorous growth with strong stems and healthy green leaves. The first true leaves appear within 5–7 days, and by week 3, you’ll notice rapid vertical development. Don’t panic if it stretches more than expected — that’s normal for this strain. The citrus-diesel scent starts early, especially under strong light. Focus on consistency: stable temperatures, moderate watering, and plenty of airflow to prevent humidity buildup.

Common Mistakes and How to Fix Them

• Overwatering seedlings — let the top soil dry slightly between waterings.
• Using too strong nutrients — start at half dose and increase slowly.
• Ignoring airflow — use a small fan to strengthen stems and prevent mold.
• Pruning too aggressively — avoid topping or FIM on autos; stick to light defoliation.
• Harvesting too early — wait until most trichomes turn milky for full effect.

Fine-Tuning for Maximum Flavor and Yield

1. Start with a 20/4 photoperiod for steady growth.
2. Use pots of 18–27 L to allow full root development.
3. Feed with a balanced base nutrient like Basic Advanced Nutrients Kit from week 2.
4. Boost resin production with Sensi Bloom A+B Advanced Nutrients during flowering.
5. Monitor trichomes weekly with a handheld microscope.
6. Flush with plain water 7 days before harvest for a smoother smoke.

Advantages of Learning with a High-Performance Strain

• Builds confidence with fast, visible results.
• Teaches nutrient response through clear growth changes.
• Reveals flavor development through careful drying and curing.
• Delivers usable harvests even with minor errors.
• Encourages experimentation with training techniques.

Technical specifications

• Breeder / Brand: Advanced Seeds
• Type: Autoflowering
• Dominance: Indica 70% / Sativa 30%
• Genetics: Auto Diesel × Auto Critical
• Complete cycle: 60–70 days (germination to harvest)
• Indoor yield: 450–500 g/m² (15.8–17.6 oz/ft²)
• Outdoor yield: 150+ g/plant (5.3+ oz/plant)
• Indoor height: 0.80–1.20 m (2.62–3.94 ft)
• Outdoor height: 1.1–1.6 m (3.61–5.25 ft)
• THC: 17%
• Flavor & Aroma: Citrus, orange, sweet, diesel
• Effect: Balanced, relaxing, moderately uplifting
• Difficulty: Low
• Structure: Strong, bushy, multiple side branches
• Resistance: Good resistance to mold and pests
• Training: Suitable for LST, not for topping
• Recommended pot: 18–27 L final pot
• Light: 20 hours on / 4 hours off
• Climate: Prefers temperate to warm conditions
• Smell during grow: Medium to high — consider a carbon filter

How to Grow Auto Biodiesel Mass XXL for Best Results

Quick overview: Autoflowering · Advanced Seeds · 60–70 day cycle · low difficulty · ideal for indoor and outdoor.

Safe start: Germinate in a moist paper towel at 22–25 °C. Transplant carefully when the taproot is 1–2 cm long. For a stronger start, Pro Roots accelerates root development and reduces shock.

Stable seedling: Keep humidity at 60–70% and temperature at 22–26 °C. Water lightly and ensure good drainage. Use airy soil or coco to prevent root rot.

Directed growth: Maintain 20/4 light cycle. Avoid aggressive pruning. Train gently with low-stress techniques (LST) to expose more bud sites. A pot of 18–27 L ensures full development.

Flowering by stages: Begins automatically around week 3–4. In mid-flower, reduce humidity to 40–50% and increase airflow. Support heavy colas with stakes if growing outdoors.

Harvest and refinement: Harvest when 70% of trichomes are milky. Flush 7–10 days before cutting. Dry at 18–22 °C and 50–60% RH for 10–14 days, then cure in jars for 2–4 weeks for enhanced flavor.

Frequently Asked Questions

How long does it take to master growing Auto Biodiesel Mass XXL?

You’ll understand its rhythm in one cycle. Most growers feel confident by harvest, especially when using reliable nutrients and monitoring trichomes.

How do I know if I’m using the right amount of water or nutrients?

Watch the leaves: slight drooping means it’s time to water. Dark green, clawed tips mean too much nitrogen. Start low and adjust based on plant response.

What if I don’t like the flavor or effect?

This strain delivers a classic citrus-diesel profile and balanced high. If it’s not your favorite, use it as a learning experience — the skills you gain apply to any future grow.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Auto Biodiesel Mass XXL last summer in my 2.40 m x 2.40 m tent with a 600W LED. I used 20 L pots and a coco-perlite mix. Honestly, I didn’t baby it — I even forgot to water twice, and it bounced back. The smell kicked in hard by week 4, so I had to fire up my carbon filter. I trained it with LST to create an even canopy, and by week 7, the buds were stacking up fast. I flushed for 10 days and harvested on day 68. After curing, I got 512 g/m² — dense, sticky, and full of that sweet diesel punch. The high was smooth: relaxed but clear-headed, perfect for unwinding after work. My biggest lesson? Don’t overthink autos. Let them grow, support them lightly, and trust the genetics.