Bruce Banner 3 Auto

Bruce Banner #3 Auto Cannabis Seeds

Bruce Banner #3 Auto is an autoflowering cannabis seed from Original Sensible Seeds that packs the legendary potency of Bruce Banner #3 into a compact, fast-finishing plant. One of the first strains to crack the 30% THC ceiling in its photoperiod form, this auto version still delivers a serious 20% THC — enough to rival plenty of full-size photoperiod genetics. Seed to harvest in 65-70 days, topping out at 80-100cm. That's the kind of plant that fits in a wardrobe grow and still fills your jars.

Bruce Banner #3 Auto Specifications

Here's what Original Sensible Seeds lists for Bruce Banner #3 Auto. These numbers come from the breeder's own testing — your results will depend on your setup, medium, and how much attention you pay to your environment.

Why Bruce Banner #3 Auto Deserves a Spot in Your Tent

The original Bruce Banner #3 is a beast. Massive plants, eye-watering THC levels, and a reputation that precedes it in every grow forum you'll find. The problem? It's a photoperiod strain that can stretch to 3 metres outdoors and needs careful light schedule management. Not everyone has the ceiling height, the separate veg and flower spaces, or the patience for that.

Bruce Banner #3 Auto solves the space problem without gutting the genetics. Original Sensible Seeds crossed the original BB3 with Auto Ghost OG, and the result stays under a metre tall while still pushing 20% THC. That's not a compromise — that's genuinely strong for an autoflower. Plenty of photoperiod strains from five years ago would have been thrilled with 20%. You plant the seed, give it 18-20 hours of light from day one, and 65-70 days later you're trimming. No light schedule flipping, no worrying about light leaks triggering hermaphrodites.

The honest limitation: you won't hit 30% THC with this auto. If you're chasing the absolute ceiling of what Bruce Banner can do, the photoperiod version is still the one to grow. But if you want the Bruce Banner flavour profile — that diesel-forward, lemon-tinged, earthy funk — in a plant that fits in a 60x60cm tent and finishes before some photoperiods even start flowering, this is the one. We'd pick Bruce Banner #3 Auto over most mid-range photoperiod strains for a quick winter run when you want something potent without a 4-month commitment.

Growing Bruce Banner #3 Auto — What to Expect

Autoflowers have come a long way since the early Lowryder days, and Bruce Banner #3 Auto is a good example of modern auto breeding done right. Here's how to get the most out of her.

1. Germination: Soak your seed in a glass of water for 12-24 hours, then transfer to a damp paper towel until the taproot emerges (usually 24-48 hours). Plant directly into your final pot — autos don't like being transplanted because any root disturbance during their short life cycle costs you yield.
2. Pot size: Go with 11-15 litre pots. Bigger isn't always better with autos — they don't have time to fill a 25-litre container. An 11-litre fabric pot is the sweet spot for most growers.
3. Light schedule: 18/6 or 20/4 from seed to harvest. Some growers run 24/0, but we've seen better resin production with at least 4 hours of dark. The plant doesn't need a 12/12 flip — she'll start flowering on her own around week 3-4.
4. Feeding: Start light. Autoflowers are more sensitive to overfeeding than photoperiods. Use half-strength nutrients for the first two weeks, then gradually increase. Switch to bloom nutrients when you see the first pistils.
5. Training: Low-stress training (LST) works brilliantly — gently bend the main stem to open up the canopy and expose lower bud sites to light. Avoid topping or high-stress techniques. With only 65-70 days total, the plant doesn't have time to recover from aggressive pruning.
6. Harvest window: Check trichomes with a jeweller's loupe from day 60 onwards. Milky trichomes with 10-20% amber gives you the balanced effect BB3 Auto is known for. Harvesting too early (all clear trichomes) will leave you with a thinner, racier result.

At 80-100cm, she's compact enough for a 60x60cm tent but will fill an 80x80 nicely if you run 2-4 plants. Expect dense, resinous buds coated in trichomes — the kind that stick to your fingers when you trim. The diesel and lemon aroma gets loud in the last two weeks of flowering, so make sure your carbon filter is working properly.

Flavour and Aroma of Bruce Banner #3 Auto

This is where Original Sensible Seeds really nailed the translation from photoperiod to auto. Crack open a cured jar of Bruce Banner #3 Auto and the first thing that hits you is diesel — sharp, pungent, unmistakable. Underneath that, there's a sweet lemon note that rounds things out, almost like lemon zest stirred into something earthy and dank. The smoke carries all of that through, with the diesel sitting on your tongue and the sweetness coming through on the exhale.

The terpene profile leans heavily on myrcene and caryophyllene, with limonene providing that citrus edge. If you've enjoyed strains like Sour Diesel or Ghost OG, you'll recognise the family resemblance immediately. The earthiness gives it weight — this doesn't taste like a light, fruity auto. It tastes like a proper, full-bodied cannabis strain that happens to finish in 10 weeks.

Bruce Banner #3 Auto vs the Photoperiod Original

The question everyone asks: how does the auto compare to the real thing? Here's a straightforward breakdown.

The auto gives up roughly 10% THC and some yield potential, but gains speed, simplicity, and a footprint that fits anywhere. For a first-time grower or someone running a perpetual harvest with staggered planting, Bruce Banner #3 Auto is the smarter choice. For maximum potency chasers with tall tents and time on their hands, the photoperiod still wins.