GSC by Kannabia

GSC strain photo
Type mostly sativaFlower ±68 daysTHC 25 %Cross OG Kush × Girl Scout Cookies

Bred by Kannabia from OG Kush × Girl Scout Cookies, GSC is a sativa-leaning cannabis variety. Indoors it typically finishes flowering in around 68 days after the flip to 12/12. Reported THC is 25 %. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real GSC grows against.

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BreederKannabia
Typemostly sativa
Flowering time±68 days
THC25 %
EnvironmentOutdoors
LineageOG Kush × Girl Scout Cookies

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🧬 Explore the family: OG Kush · Girl Scout Cookies

Ancestry Pedigree

OG Kush
Clone Only Strains
Thailand Sativa
Original Strains
Chem Dawg
Unknown or Legendary
Indica
Original Strains
Girl Scout Cookies
Clone Only Strains
F1 Durban
Unknown or Legendary
Cherry Pie Kush
Unknown or Legendary
Durban Poison
Dutch Passion
Durban Poison
Unknown or Legendary
South Africa Sativa
Original Strains
Chem Dawg
Unknown or Legendary
OG Kush
Clone Only Strains

Growing GSC: what to expect

As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with OG Kush or Girl Scout Cookies 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.

GSC FAQ

How long does GSC take to flower?

GSC typically flowers in around 68 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is GSC an indica or a sativa?

GSC is listed as mostly sativa.

What are the parents of GSC?

GSC was bred from OG Kush × Girl Scout Cookies by Kannabia.

How strong is GSC?

Reported THC for GSC is 25 %. Actual potency depends heavily on environment, harvest ripeness, and cure quality.

What environment does GSC 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.

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Facts compiled from public breeder listings. Growing GSC? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.