Alien Nightmare by Sin City Seeds
A indica-leaning cross of Aliens On Moonshine × WhiteNightmare, Alien Nightmare — released by Sin City Seeds — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 61 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Alien Nightmare grows against.
🌿 Start a Alien Nightmare journal — free →
Similar strains
| Breeder | Sin City Seeds |
|---|---|
| Type | 40% Sativa 60% Indica |
| Flowering time | ±61 days |
| Environment | Outdoors |
| Lineage | Aliens On Moonshine × WhiteNightmare |
| Descendants | Arabian Night |
🌱 Get Alien Nightmare seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Aliens On Moonshine · WhiteNightmare · Arabian Night
Ancestry Pedigree
Sin City Seeds
The Cali Connection
The Cali Connection
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
Sensi Seeds
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
Original Strains
Original Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Cultivators Choice
Unknown or Legendary
The Cali Connection
Unknown or Legendary
The Cali Connection
Clone Only Strains
Clone Only Strains
Original Strains
Unknown or Legendary
Sensi Seeds
Original Strains
Original Strains
The Cali Connection
Clone Only Strains
Unknown or Legendary
Original Strains
The Cali Connection
Unknown or Legendary
Unknown or Legendary
Original Strains
Unknown or Legendary
Clone Only Strains
Original Strains
DJ Short
DJ Short
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Original Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Sin City Seeds
Clone Only Strains
DJ Short
Mr Nice Seedbank
Green House Seeds
Cultivators Choice
Unknown or Legendary
Original Strains
Original Strains
Original Strains
Original Strains
Cultivators Choice
Unknown or Legendary
Growing Alien Nightmare: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Aliens On Moonshine or WhiteNightmare 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.
Alien Nightmare FAQ
How long does Alien Nightmare take to flower?
Alien Nightmare typically flowers in around 61 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Alien Nightmare an indica or a sativa?
Alien Nightmare is listed as 40% Sativa 60% Indica.
What are the parents of Alien Nightmare?
Alien Nightmare was bred from Aliens On Moonshine × WhiteNightmare by Sin City Seeds.
What environment does Alien Nightmare 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 Alien Nightmare and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Alien Nightmare? 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.