Indica Dominant · ILGM Genetics
Girl Scout Cookies
Girl Scout Cookies is the Bay Area cross of OG Kush and Durban Poison made famous by the Cookie Family collective. The seed-line versions sold by ILGM and others reproduce the dominant Thin Mint phenotype: short, branchy plants with dark purple-tinted leaves and a sweet-mint, doughy terpene profile. Expect nine to ten weeks of flower, moderate yields, and trichome coverage that frosts even the largest fan leaves around week seven.
Reviewed 2026-05-23· Sources: seedfinder.eu, Cookie Fam history
Potency
- THC range
- 20–28%
- Typical THC
- 25%
- CBD
- up to 0.2%
Flowering
- Indoor weeks
- 9–10 wk
- Difficulty
- Moderate
- Climate
- Mediterranean, indoor
Yield & size
- Indoor
- 450-550 g/m²
- Outdoor
- 400-600 g/plant
- Height
- 90-130 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Girl Scout Cookies smells, tastes, and ultimately feels in the body.
- dominant
Caryophyllene
Peppery and spicy — the only terpene that binds CB2 receptors, studied for anti-inflammatory action.
- secondary
Limonene
Uplifting citrus — typically associated with mood elevation and stress relief.
- secondary
Humulene
Hoppy and earthy — appetite-suppressing and shared with hops and sage.
- minor
Myrcene
Sedating, musky, herbal — commonly linked to couch-lock effects.
Reported side effects
Lineage
Girl Scout Cookies traces to OG Kush × Durban Poison. The cross sits in the Cookies family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents and grandparents for Girl Scout Cookies based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Strains crossed with Girl Scout Cookies
Girl Scout Cookies is a parent of 5 strains in the broader catalogue. These are crosses that carry Girl Scout Cookies genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 60% / 40%
- Flowering days
- 63–70 days
- Stretch
- Moderate
- Pest resistance
- Moderate
- Mold resistance
- Moderate
- Training methods
- topping, lst, scrog
Feed schedule for Girl Scout Cookies
These EC and NPK targets are starting points calibrated for the strain's Indica lean and moderate difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.4-1.6 EC
- Early flower
- 1.5-1.7 EC, NPK 2-3-4
- Mid flower
- 1.8-2.0 EC, NPK 1-4-6
- Late flower
- 1.6-1.8 EC
- Final week
- Plain pH-balanced water for the last 7-10 days; light flush if you ran nutrients on the higher end.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Girl Scout Cookies is documented with a 10-week flower and a compact stretch typical of indica-leaning structure. The visual below maps a documented 14-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Girl Scout Cookies concentrate the most observational notes on the late-flower ripening window. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Girl Scout Cookies. Plants establish root structure, leaf canopy, and node count before flower triggering, with a moderate difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-8)
- Girl Scout Cookies is documented as having moderate stretch. Reports describe the plant roughly doubling in height during this phase as the indica-leaning structure establishes its final flowering frame.
- Bud sites (weeks 9-10)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Girl Scout Cookiesnote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 11-12)
- Flowers thicken and calyxes fatten through this phase. Documented Girl Scout Cookies runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 13)
- Trichomes transition from clear toward cloudy and amber. Reports for Girl Scout Cookies describe the Caryophyllene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 14)
- Calyx swelling is documented as complete and the harvest window opens. Published Girl Scout Cookies runs end here, within the 9-10 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Common questions about Girl Scout Cookies
Which GSC phenotype do most seed lines reproduce?
Thin Mint is the most common phenotype expressed in seed runs. Forum Cut and Platinum phenotypes are rare and almost always clone-only.
How tall does Girl Scout Cookies get?
Indoor plants typically finish between 90 and 130 cm with one or two toppings. Outdoor specimens can reach 200 cm in long seasons.
Breeder of record
ILGM Genetics
View breeder profile and other strains →
More from ILGM Genetics
Strains similar to Girl Scout Cookies
These picks lean on the same terpene profile and parent genetics as Girl Scout Cookies — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.