Big Devil XL Auto by Sweet Seeds
When autos were still fighting their reputation for being small and low-yielding, Sweet Seeds dropped Big Devil XL Auto and completely changed the game. As a 3rd-generation autoflower, this cross between their own Big Devil #2 and an auto Jack Herer is nothing short of a freak of nature. Unlike those early lowryders that topped out at your knees, this beast easily hits 110 to 160 centimeters. It proved once and for all that you didn't need photoperiods to pull massive, commercial-scale harvests.
Running this strain is incredibly forgiving, making it a favorite for outdoor guerrilla growers and indoor max-yield chasers. She vegs with insane vigor, throwing out thick lateral branches that eventually fill up with heavy, resin-drenched colas. You barely have to feed her anything crazy; just give her plenty of light and a big enough pot, and she will reward you with up to 650 grams per square meter indoors. The whole cycle from seed to chop takes about 9 to 9.5 weeks, which is mind-blowing when you see the sheer size of the plants at harvest time.
The smoke profile leans heavily on its Jack Herer roots. You get a sharp, lemony citrus blast up front, followed by a thick, incense-like haze on the exhale. It’s sweet, sticky, and incredibly smooth. The high is a beautifully balanced hybrid experience—it hits with a soaring cerebral rush that gets you talking, but eventually settles into a nice, relaxing body stone. It’s just an absolute workhorse of a strain that delivers top-shelf quality with zero fuss.
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Similar strains
| Breeder | Sweet Seeds |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±63 days |
| Environment | Outdoors |
| Lineage | Jack Herer × Big Devil Nr2 Auto |
| Descendants | Sweet Trainwreck Auto, Sweet Seeds - Sweet Trainwreck Auto, Auto Diablo XL, Auto Giant Devil XL, Auto Big Devil Kiss, Dark Devil Auto |
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Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
🧬 Explore the family: Jack Herer · Sweet Trainwreck Auto · Sweet Seeds - Sweet Trainwreck Auto · Auto Diablo XL · Auto Giant Devil XL · Auto Big Devil Kiss · Dark Devil Auto
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Growing Big Devil XL Auto: what to expect
Because Big Devil XL Auto is an autoflower it runs on age, not photoperiod: keep it under 18–20 hours of light from sprout to harvest, start in its final pot, and go easy on training after week 3 — autos never pause to recover. Growers familiar with Jack Herer or Big Devil Nr2 Auto will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
Big Devil XL Auto FAQ
How long does Big Devil XL Auto take to flower?
Big Devil XL Auto typically flowers in around 63 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Big Devil XL Auto an indica or a sativa?
Big Devil XL Auto is listed as ruderalis/indica/sativa (autoflowering).
What are the parents of Big Devil XL Auto?
Big Devil XL Auto was bred from Jack Herer × Big Devil Nr2 Auto by Sweet Seeds.
What environment does Big Devil XL Auto like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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