Nightmare Gom by MadCats
A indica-leaning cross of Med Gom 1 × Nightmare OG, Nightmare Gom — released by MadCats — shows up in a lot of tents for good reason. Indoors it typically finishes flowering in around 80 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Nightmare Gom grows against.
🌿 Start a Nightmare Gom journal — free →
Similar strains
| Breeder | MadCats |
|---|---|
| Type | ruderalis/indica/sativa |
| Flowering time | ±80 days |
| Environment | Outdoors, Greenhouse |
| Lineage | Med Gom 1 × Nightmare OG |
🌱 Get Nightmare Gom seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Nightmare OG
Ancestry Pedigree
GrassOmatic
CBD Crew
Original Strains
Original Strains
Aficionado Seed Bank
Sin City Seeds
Reserva Privada
Reserva Privada
Clone Only Strains
Original Strains
Unknown or Legendary
Original Strains
Sin City Seeds
Clone Only Strains
DJ Short
Unknown or Legendary
DJ Short
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
Mr Nice Seedbank
Green House Seeds
Cultivators Choice
Unknown or Legendary
Original Strains
Original Strains
Original Strains
Original Strains
Cultivators Choice
Original Strains
Unknown or Legendary
Clone Only Strains
Original Strains
DJ Short
DJ Short
Growing Nightmare Gom: 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 Med Gom 1 or Nightmare OG 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.
Nightmare Gom FAQ
How long does Nightmare Gom take to flower?
Nightmare Gom typically flowers in around 80 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Nightmare Gom an indica or a sativa?
Nightmare Gom is listed as ruderalis/indica/sativa.
What are the parents of Nightmare Gom?
Nightmare Gom was bred from Med Gom 1 × Nightmare OG by MadCats.
What environment does Nightmare Gom 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 Nightmare Gom and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Nightmare Gom? 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.