Auto Thunderfuck by GeneSeeds Bank
Auto Thunderfuck, from breeder GeneSeeds Bank, is an autoflowering strain descended from Alaska Thunderfuck × Ruderalis. Indoors it typically finishes flowering in around 75 days from sprout. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Auto Thunderfuck grows against.
🌿 Start a Auto Thunderfuck journal — free →
Similar strains
| Breeder | GeneSeeds Bank |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±75 days |
| Environment | Outdoors |
| Lineage | Alaska Thunderfuck × Ruderalis |
| Descendants | Royal Cookies Automatic |
🌱 Get Auto Thunderfuck seeds →
Affiliate link — supports Cultivar at no cost to you.
Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
🧬 Explore the family: Alaska Thunderfuck · Ruderalis · Royal Cookies Automatic
Ancestry Pedigree
GeneSeeds Bank
Unknown or Legendary
Unknown or Legendary
Original Strains
Original Strains
Growing Auto Thunderfuck: what to expect
Because Auto Thunderfuck 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 Alaska Thunderfuck or Ruderalis 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.
Auto Thunderfuck FAQ
How long does Auto Thunderfuck take to flower?
Auto Thunderfuck typically flowers in around 75 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Auto Thunderfuck an indica or a sativa?
Auto Thunderfuck is listed as ruderalis/indica/sativa (autoflowering).
What are the parents of Auto Thunderfuck?
Auto Thunderfuck was bred from Alaska Thunderfuck × Ruderalis by GeneSeeds Bank.
What environment does Auto Thunderfuck 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.
📷 Growing Auto Thunderfuck and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Auto Thunderfuck? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
Track your own grow free — the journal grades your environment against these bands →
Get the one-page grow reference card
VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.