Girl Scout Cookies seeds are feminized photoperiod cannabis seeds that produce a sativa-dominant hybrid with 18–25% THC and a flavour profile sitting somewhere between berry smoothie and damp forest floor. Born from crossing Durban Poison with OG Kush, GSC earned its reputation through sheer potency and a terpene profile that hits you before you even grind the bud. Every seed is 100% feminized, so no males to cull and no wasted tent space.
Why Girl Scout Cookies Seeds Are Still a Top Seller
Girl Scout Cookies seeds remain one of the most requested strains at our Amsterdam counter for a simple reason: the genetics deliver. Durban Poison brings the energetic, head-forward sativa lift; OG Kush adds the resinous, kush-heavy backbone. The result is a balanced sativa-dominant hybrid that sits around 60% sativa / 40% indica — uplifting without flattening you into the sofa.
We've carried GSC seeds since the strain first landed in Europe, and they've held their spot in our top sellers ever since. According to research published in PMC (Identification of Terpenoid Chemotypes Among High-THC Cannabis Cultivars, 2017), Girl Scout Cookies sits in a distinct terpene group dominated by caryophyllene and limonene — which is why the bud smells like sweet berries with a peppery, earthy edge.
One honest note: GSC is not the easiest strain for absolute first-time growers. It rewards a bit of patience and tent hygiene. If this is genuinely your first grow, a stable autoflower might serve you better — but if you've done one round and want to step up, this is the obvious next move.
Choosing Your Girl Scout Cookies Seed Pack
The right Girl Scout Cookies seed pack depends on your tent size and whether you want to pheno-hunt. We sell GSC in packs of 1, 3, 5, and 10. For a first proper run, 3 or 5 seeds is the sweet spot — you get backup if one germinates slowly, and enough plants to compare phenotype expressions side by side.
| Pack Size | Best For | Notes |
|---|---|---|
| 1 seed | Sampling GSC for the first time | Low commitment — good for a single-plant tent run |
| 3 seeds | First proper grow with a backup plant | Our most popular starter option since 1999 |
| 5 seeds | Filling a 1 m² canopy or pheno-hunting | Enough variety to find your favourite expression |
| 10 seeds | Full room or ongoing mother selection | Best value per seed; pick a keeper to clone |
Girl Scout Cookies Specifications
Here's what GSC seeds actually deliver in the tent. These figures match what we've seen growers report back over the years — the upper THC end (25%) needs solid lighting, careful feeding, and a properly timed harvest.
| Genetics | Durban Poison x OG Kush |
| Type | Feminized photoperiod |
| Sativa / Indica | ~60% Sativa / 40% Indica |
| THC | 18–25% |
| CBD | <1% |
| Flowering Time | 8–10 weeks |
| Indoor Yield | Up to 500 g/m² |
| Outdoor Harvest | Mid to late October (Northern Hemisphere) |
| Height | Medium (90–160 cm indoors) |
| Flavour | Sweet berry, earthy, hint of mint and cookie dough |
| Dominant Terpenes | Caryophyllene, limonene, humulene |
Flavour, Aroma and What Growers Actually Report
Girl Scout Cookies smells like a bakery that's been left out in a pine forest. Sweet, doughy top notes with a peppery, slightly minty back — caryophyllene doing the heavy lifting on the spice side, limonene adding the citrus-berry brightness. Once cured properly (two weeks in jars, burped daily), the flavour deepens into something closer to berry compote with a kush exhale.
According to Healthline's strain guide, experienced consumers often turn to Girl Scout Cookies as a potent option, with effect intensity tied directly to its high THC content. Worth noting: a 2019 PMC review (The Problem with Current High Potency THC Marijuana) flagged that modern high-THC cultivars like GSC are significantly stronger than the cannabis available pre-1990s, so if you're new to growing potent strains, harvest a little earlier rather than later.
How to Grow Girl Scout Cookies Seeds
GSC is a moderate-difficulty grow that rewards good airflow, a stable feeding schedule, and a bit of training. It stretches in early flower — expect plants to roughly double in height between week 1 and week 3 of 12/12. Plan your tent height accordingly.
- Germinate. Paper towel method or direct-to-soil in a small starter cup. Expect tap roots within 24–72 hours.
- Veg for 4–6 weeks. GSC responds well to topping at the 4th or 5th node and a light LST to spread the canopy.
- Flip to 12/12. Brace for the stretch — install your trellis (ScrOG net) before week 2 of flower.
- Feed moderately. GSC is a moderate feeder; nitrogen lockout in late veg is a common rookie mistake. Ease back on nutes from week 5 of flower onward.
- Watch trichomes. Cloudy with 10–20% amber is the classic GSC harvest window — usually around day 60–70 of flower.
- Dry slow, cure long. 10–14 days at 18°C / 60% RH for the dry, then 4+ weeks in glass jars. The terpenes need the time.
Best Pack to Start With
If you're asking us flat out: get the 5-pack. It's the best balance for finding a keeper phenotype without committing to a full room. GSC throws a few different expressions — some leaning more Durban (taller, spicier), some more OG (denser, fuel-heavy) — and 5 plants gives you enough variation to spot your favourite and clone her.
Complete your setup: Pair these seeds with a complete grow tent kit (we'd recommend an 80x80 with carbon filter for a 5-seed run) and a quality LED panel. GSC's dense, resinous flowers attract powdery mildew in stuffy tents, so a proper extraction fan isn't optional — it's the difference between 500 g/m² and a mouldy harvest.
Honest Limitations
A few things we'd rather say upfront than have you discover at week 7. Girl Scout Cookies is sensitive to humidity in late flower — buds get dense, and powdery mildew loves dense buds in stuffy tents. Keep RH under 50% from week 5 onward. Second, GSC is a moderate yielder, not a monster. If you want kilos per light, this isn't your strain — go for something Critical-based. GSC trades volume for potency and flavour. Third, the high THC means trimming time gets sticky fast. Have isopropyl and gloves ready.
Frequently Asked Questions
Are Girl Scout Cookies seeds feminized?
Yes — every Girl Scout Cookies seed we sell is 100% feminized. That means every seed grows into a female, flower-producing plant. No males to identify and cull, no wasted tent space.
How long does Girl Scout Cookies take to flower?
8 to 10 weeks indoors under 12/12 light. Most phenotypes finish around day 63–70. Outdoors in the Northern Hemisphere, expect to harvest mid to late October.
What's the THC level of Girl Scout Cookies?
18–25% THC depending on phenotype, growing conditions, and harvest timing. Research published on PMC notes that modern GSC is significantly more potent than pre-1990s cannabis, so harvest timing matters a lot.
Is Girl Scout Cookies a sativa or indica?
Sativa-dominant hybrid — roughly 60% sativa, 40% indica. The Durban Poison parent contributes the energetic head-forward character, while OG Kush adds the resinous, body-heavy backbone.
How much does Girl Scout Cookies yield indoors?
Up to 500 g/m² under proper conditions — meaning quality LED or HPS lighting (around 600W per square metre), good ventilation, and a ScrOG or LST setup to spread the canopy.
Why is Girl Scout Cookies so popular?
The Durban Poison x OG Kush cross delivers high THC, a varied terpene profile dominated by caryophyllene and limonene, and a flavour that's genuinely distinctive. It also clones well, making it a favourite for growers building mother-plant libraries.
Is Girl Scout Cookies good for beginners?
Moderate difficulty — not the easiest first grow, but doable if you've done one round before. The main watch-outs are humidity control in late flower and managing the early-flower stretch. A simple autoflower is a gentler starting point if this is your very first grow.
Last updated: April 2026
