Description
Bred by Sweet Seeds from Big Devil #2 Auto crossed with an automatic Jack Herer, Big Devil XL Auto carries the genetic weight of one of cannabis culture's most respected sativas. The aroma leans into fresh mint layered with warm spice, and the effect follows the sativa-dominant profile: clear-headed and energetic, with THC testing between 16 and 24 percent that keeps things engaging without overwhelming. Low CBD levels mean this is a THC-forward experience from seed to jar.
For cultivation, this feminised autoflower moves from seed to harvest in 8 to 10 weeks, making it genuinely practical for back-to-back cycles in a controlled environment. Indoors, yields push above 600 g/m2, which is exceptional for an auto and will fill a mid-size tent with room to spare. Outdoor plants reach a medium stature and deliver an average of 200 to 450 grams per plant, making them manageable on a balcony or in a discreet garden plot. The sativa structure benefits from a little canopy management, but Sweet Seeds has dialed this line in well. If you want a fast, high-yielding auto with genuine genetic credentials, this one earns its place in any grow room.
Big Devil XL Auto Feminised Seeds
Description:
A sativa-dominant autoflower from Sweet Seeds that inherits Jack Herer's celebrated lineage, Big Devil XL delivers minty, spicy character and high THC in a compact, fast-finishing package built for serious harvests.
Best For
Beginner growers seeking an uplifting, energizing sativa high
- Type
- Feminised – Autoflowering
- Genetics
- Big Devil #2 Auto® x Jack Herer (automatic)
- THC / CBD
- High THC (16-24%) / Low CBD (0-1%)
- Effects
- Energetic,Uplifting
- Flavour / Aroma
- Minty,Spicy
- Height
- Medium
- Yield
- Average Yield (200-450gr/plant) / Very High Yield (above 600gr/m2)
- Auto Harvest
- 8 to 10 weeks
- Difficulty
- Easy
FAQ
All you need to know
about this product
Big Devil XL Auto brings Jack Herer's legendary sativa lineage to a fast-finishing autoflower, ready for beginner growers who expect serious results.
Sweet Seeds designed this strain with accessibility in mind, and its easy difficulty rating reflects that. As a feminised autoflower, it removes the need to manage light cycles or sex plants, so newer growers can focus on the basics and still expect rewarding harvests within 8 to 10 weeks from seed.
The profile leans into fresh mint layered over warm, peppery spice — a combination that traces back to its Jack Herer parentage. It's a distinctive character that stands out from more generic autoflower offerings, and it carries through from the growing space into the final product.
Indoor growers can achieve above 600 grams per square metre under optimised conditions, which puts Big Devil XL Auto firmly in the very high yield category for an autoflower. Per plant, expect somewhere in the 200 to 450 gram range depending on your setup and growing environment.
With THC sitting between 16 and 24 percent and very low CBD, this is a THC-forward experience that leans energetic and clear-headed rather than sedating. The sativa-dominant genetics keep things uplifting and engaging, making it a strong choice for daytime use or creative sessions.
You Might Also Like
Discover more
legendary genetics
Explore handpicked strains with similar flavors and traits — perfect for your next grow.
Black Jack Feminised Seeds
A resinous cross of Black Domina '98 and Jack Herer from Sweet Seeds, Black Jack Feminised delivers piney, spicy depth alongside a potent, well-rounded effect that earns its place in any serious garden.
Dark Devil Auto Feminised Seeds
Deep, earthy berry notes and striking red-to-purple coloration define Dark Devil Auto, Sweet Seeds' autoflowering cross of Big Devil XL Auto and Hindu Kush that delivers high THC harvests on an effortless timeline.
Red Poison Auto Feminised Seeds
A vivid, fruity-skunky autoflower from Sweet Seeds, Red Poison Auto delivers indica relaxation and striking color in a compact, fast-finishing package bred from Green Poison and Pakistani Kush genetics.