Big Blue Devil Auto from Seeds66 is made for growers who enjoy rich berry flavours without giving up reliability or yield. This cross between an aromatic Blueberry Auto line and the productive Big Devil produces compact plants with dense, resin-coated flowers that perform well in small indoor tents and in sunny outdoor spots alike. If you’re looking for an uncomplicated, Indica-leaning autoflower with a clear fruit-forward profile, this one quickly becomes a favourite for relaxed evenings.
Quick Info: Big Blue Devil Auto
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Genetics: Blueberry Auto x Big Devil
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Type: feminized, autoflowering Indica line
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Lifecycle: approx. 65–70 days from seed to harvest
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Indoor Yield: 400–500 g/m²
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Outdoor Yield: 50–100 g per plant
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THC: 18–21 %
Origin & Seeds66 Selection
The foundation of Big Blue Devil Auto is a berry-driven Blueberry Auto line combined with Big Devil as the yield enhancer. Blueberry contributes the fruity, sweet, and slightly incense-like notes, while Big Devil adds structure, lateral growth and production stability. The result is an Indica-dominant autoflower that delivers a clear, recognisable profile and enough vigor for multiple consistent harvests.
During our internal test runs in California, we focused on phenotypes that reliably combined three traits: compact structure for smaller setups, a clean and expressive berry profile, and yields strong enough to compete with bigger autos. Only plants showing this behaviour across multiple cycles made it into the final Seeds66 version.
Growth & Cultivation
For a high-yielding autoflower, Big Blue Devil Auto remains pleasantly manageable. Indoors she typically reaches 60–110 cm with a strong central stem and solid side branches. Outdoors, in a sunny and protected spot, heights of 100–160 cm are common. She suits growers who want weight and aroma without excessive stretch.
As with most autos, planting straight into the final pot works best. Eight to ten litres are ideal, with larger volumes giving slightly more room for root expansion. A light, well-draining substrate allows vigorous early development. She responds well to steady, balanced feeding — extreme EC levels or long nutrient gaps offer no advantage here.
The complete lifecycle sits around 65–70 days from seed to harvest. Throughout this period, she builds mass steadily without slowing down. Indoors, 400–500 g/m² are realistic with proper lighting and airflow. Outdoors, yield depends heavily on sunlight and season; in a warm, bright location, 50–100 g per plant are a solid target.
Seeds66 Tip:
Keep nitrogen on the moderate side during early growth, and consider adding a bit more calcium and magnesium during mid-flower if your water is soft. Many growers get the cleanest berry-forward aroma by watering only with plain water for the final 10–14 days.
Aroma & Terpenes
Big Blue Devil Auto fills the room with a noticeable berry scent. Expect a blend of ripe forest fruits, gentle sweetness, and a warm, slightly spicy undertone reminiscent of classic skunk/incense lines. When breaking up the dried buds, the aroma intensifies: deeper blueberry notes layered over a subtle earthy base.
On the palate she stays true to that profile. The first inhale is smooth and fruity, followed by a mild resinous spice on the exhale. Proper drying and curing make the smoke soft and leave a berry-spiced aftertaste without harshness or artificial perfume.
Effects
Big Blue Devil Auto delivers a calm, grounded Indica effect without becoming overwhelmingly heavy. The onset begins with a light mood lift and a headspace that feels more settled. Soon after, body relaxation spreads gently, easing muscle tension and taking the edge off the day.
With 18–21 % THC, she should be dosed thoughtfully. In moderate amounts, she suits evenings with music, films, or a quiet meal. Higher amounts tend to encourage long couch sessions and early nights.
Seeds66 Philosophy
For us at Seeds66, Big Blue Devil Auto represents what a modern autoflower should achieve: easy handling, consistent results and a flavour profile that stands on its own. In well-balanced setups, she performs predictably and mirrors the behaviour we documented across our test cycles in California.
We treat autoflowers as full-value strains, not filler material. A line remains in the Seeds66 range only if it delivers reproducible results across multiple runs — regardless of whether it is auto or photoperiod.
Properties of Big Blue Devil Auto
Type
Indica-dominant autoflower hybrid
Seed Form
feminized, autoflowering Seeds66 line
Genetics
Blueberry Auto – Big Devil
Effect
relaxing, balancing, ideal for late evenings
Flavour
spicy / fruity / berries / light resin sweetness
Lifecycle
65–70 days from seed to harvest
Indoor Yield
400–500 g/m²
Outdoor Yield
50–100 g per plant
Height Indoors
60–110 cm
Height Outdoors
100–160 cm
THC / CBD
18–21 % / 0.3 %
Climate Zones
temperate to warm regions with high sun exposure; protected outdoor spots or greenhouse recommended
Seeds66 Note
a compact, fruit-heavy autoflower ideal for growers looking for flavour and simplicity
Seeds66 Editorial Team
All descriptions are based on our tests and documentation carried out in California. We publish only strains we have documented ourselves, focusing on germination strength, stability and reproducible results for growers.
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