Ultimate Indoor by Capricorn Seed Co.
Ultimate Indoor is an indica-leaning cannabis strain from Capricorn Seed Co., bred by crossing Northern Lights × Matanuska Thunder. Indoors it typically finishes flowering in around 53 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Ultimate Indoor grows against.
🌿 Start a Ultimate Indoor journal — free →
Similar strains
| Breeder | Capricorn Seed Co. |
|---|---|
| Type | indica |
| Flowering time | ±53 days |
| Environment | Indoors |
| Lineage | Northern Lights × Matanuska Thunder |
🌱 Get Ultimate Indoor seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Northern Lights · Matanuska Thunder
Ancestry Pedigree
Unknown or Legendary
Original Strains
Brothers Grimm
Unknown or Legendary
Original Strains
Original Strains
Growing Ultimate Indoor: 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 Northern Lights or Matanuska Thunder 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.
Ultimate Indoor FAQ
How long does Ultimate Indoor take to flower?
Ultimate Indoor typically flowers in around 53 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Ultimate Indoor an indica or a sativa?
Ultimate Indoor is listed as indica.
What are the parents of Ultimate Indoor?
Ultimate Indoor was bred from Northern Lights × Matanuska Thunder by Capricorn Seed Co..
What environment does Ultimate Indoor 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 Ultimate Indoor and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Ultimate Indoor? 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.