Grand OG by Roor Seeds
Bred by Roor Seeds from True OG × White Widow, Grand OG is an indica-leaning cannabis variety. Indoors it typically finishes flowering in around 60 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Grand OG grows against.
🌿 Start a Grand OG journal — free →
Similar strains
| Breeder | Roor Seeds |
|---|---|
| Type | mostly indica |
| Flowering time | ±60 days |
| Environment | Outdoors |
| Lineage | True OG × White Widow |
🌱 Get Grand OG seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: True OG · White Widow
Ancestry Pedigree
Unknown or Legendary
Clone Only Strains
Original Strains
Original Strains
Unknown or Legendary
De Sjamaan
Original Strains
Original Strains
Growing Grand OG: 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 True OG or White Widow 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.
Grand OG FAQ
How long does Grand OG take to flower?
Grand OG typically flowers in around 60 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Grand OG an indica or a sativa?
Grand OG is listed as mostly indica.
What are the parents of Grand OG?
Grand OG was bred from True OG × White Widow by Roor Seeds.
What environment does Grand OG 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 Grand OG and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Grand OG? 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.