GSC Feminized Seeds by Kannabia – Legendary West Coast Genetics with Lavender & Mint Notes

Kannabia's GSC feminized seeds are your passport to cultivating a legendary West Coast phenotype, a sativa-dominant hybrid that delivers a powerful 25% THC experience wrapped in a uniquely refreshing flavor profile of lavender and mint.

Are you tired of predictable, one-dimensional highs from your homegrown stash?

It's frustrating when you invest months into a grow only to harvest buds that offer the same old heavy sedation or a generic, forgettable buzz. You crave complexity—a high that can mellow you out on the couch but also spark creative energy when you need it.

This lack of nuance turns your prized harvest into just another jar on the shelf.

Settling for mediocre genetics means missing out on the full sensory journey. You get the potency, but not the distinctive terpene profile that makes each session an event. Your grow space becomes a factory for effect, not an artisan workshop for flavor and experience.

GSC transforms your garden into a boutique bakery of effects.

This isn't just any Girl Scout Cookies cross; it's Kannabia's refined interpretation. By blending iconic F1 Durban and OG Kush genetics, they've stabilized a powerhouse that offers the best of both worlds: the soaring, cerebral clarity of a sativa and the deep, physical relaxation of an indica. The result is a versatile high and an unforgettable flavor that solves the problem of generic harvests.

What it feels like to grow and enjoy GSC

Watching GSC develop is a lesson in botanical beauty. Outdoors, she stretches to an impressive 1.50 m (4.92 ft), building a strong, slender frame. Indoors, she stays more manageable at around 1.25 m (4.10 ft) but responds beautifully to a SCROG net to maximize light penetration and yield. Her stems become heavy with dense, rock-hard buds that glisten under a thick blanket of resin—so much so that you'll need a good carbon filter to manage the aromatic output.

The real magic happens at harvest. Grinding up these buds releases a complex aroma: earthy, spicy foundation notes give way to a surprising and delightful finish of fresh lavender and cool mint. The smoke is smooth, and the effect is perfectly balanced. It starts with a wave of euphoric, talkative energy that gently melts into a state of deep, comfortable relaxation without locking you to the sofa. It's the perfect strain for a social evening that transitions into a chilled-out night.

How to squeeze the experience to the max

To truly unlock GSC's potential, she demands a consistent hand and a bit of finesse. Here’s how to get the most from your grow:

• Start strong: Use a premium, well-aerated substrate from the very first pot to encourage robust root development.
• Train for light: Implement Low-Stress Training (LST) early in veg to create an even canopy. For indoor grows, a SCROG net is highly recommended to support her branching and boost yields.
• Feed for flavor: During the flowering stretch, she appreciates a balanced diet. Avoid overfeeding nitrogen; instead, focus on phosphorus and potassium in weeks 3-6 of bloom to encourage those dense, resinous buds.
• Control the climate: Maintain low humidity (40-50%) in late flower to protect her dense buds from mold and maximize terpene production.
• Harvest with patience: Let her flowers mature fully. Watch the trichomes; harvesting when most are milky with some amber will give you that classic, balanced GSC effect.

Advantages and benefits in your grow room

• Stable Genetics: As a feminized seed, every plant is a flower-producing female, eliminating the guesswork and wasted space of male plants.
• High Yield Potential: Capable of producing up to 450 g/m² (1.48 oz/ft²) indoors or 500 g (17.64 oz) per plant outdoors under optimal conditions, rewarding your care with abundance.
• Pest & Mold Resistance: Inherited resilience makes her a sturdy plant, better able to handle minor environmental fluctuations than more delicate strains.
• Connoisseur-Grade Flavor: The unique lavender and mint terpene profile sets your harvest apart, offering a tasting experience that rivals top-shelf dispensary buds.
• Versatile Effect: The balanced high provides both mental stimulation and physical relief, making it suitable for various times of day and activities.

How it fits with other products in your setup

GSC thrives with a complete nutrient regimen. During the vigorous vegetative stage, a balanced grow fertilizer will support her stretch. When she flips to flower, switching to a bloom-specific nutrient with boosted PK ratios, like Brutal Bloom, will help pack on weight and density in those iconic cookie-shaped buds. For growers aiming for the ultimate in flavor and resin production, adding a quality terpene and resin enhancer in the final weeks can make those minty lavender notes truly pop.

Technical specifications

• Breeder: Kannabia Seeds
• Type: Feminized Photoperiod
• Genetics: F1 Durban x OG Kush
• Dominance: Sativa-Dominant Hybrid
• Indoor Flowering Time: 65-70 days
• Outdoor Harvest: Early to Mid October (Northern Hemisphere)
• Indoor Yield: Up to 450 g/m² (approx. 1.48 oz/ft²)
• Outdoor Yield: Up to 500 g/plant (approx. 17.64 oz)
• Indoor Height: Approx. 1.25 m (4.10 ft)
• Outdoor Height: Up to 1.50 m (4.92 ft)
• Difficulty: Intermediate (Requires consistent care)
• THC: Approx. 25%
• CBD:
• Flavor/Aroma: Earthy, Spicy, Lavender, Mint
• Effect: Balanced, Euphoric, Relaxing

Stages and monitoring of your GSC grow

Quick overview: A sativa-dominant, photoperiod feminized seed ideal for growers with some experience. She rewards consistency with high yields of potent, flavorful buds over a 65-70 day flowering period.

Safe start: Germinate in a warm (22-25°C), humid environment. Transplant carefully to avoid shock; using a root stimulator can help establish a strong foundation. Maintain higher humidity (65-70%) for seedlings.

Directed vegetative growth: Run an 18/6 light cycle. She exhibits good vigour and branching. This is the perfect time for gentle LST to shape the canopy. Keep temperatures between 22-26°C and gradually introduce nutrients as she grows.

Efficient flowering transition: Switch to a 12/12 light cycle to induce flowering. Expect a significant stretch (pre-flowering). Begin reducing humidity towards 50% and introduce bloom nutrients. Support branches if needed as buds develop.

Flowering and harvest: Maintain lower humidity (40-50%) in late flower to prevent mold in the dense buds. Flush with plain water for the last 10-14 days. Harvest when trichomes are mostly cloudy with some amber for a balanced effect. Dry slowly (18-22°C, 50-60% RH) and cure for optimal flavor.

Frequently Asked Questions

Is GSC suitable for beginner growers?

Kannabia notes this strain is "not suitable for beginners" as it requires consistent care and attention throughout its cycle. It's best tackled after you have a grow or two under your belt.

How strong is the smell during growth?

The aroma is potent, especially in late flowering. Using a high-quality carbon filter in your indoor setup is highly recommended for discretion.

What's the best way to train GSC plants?

She responds very well to Low-Stress Training (LST) and Screen of Green (SCROG) methods. These techniques help manage her height indoors and maximize light exposure to all bud sites, significantly increasing your yield.

When is the best time to harvest GSC outdoors?

In the Northern Hemisphere, expect ready-to-harvest buds in early to mid-October. Always use a jeweler's loupe to check trichome maturity (mostly cloudy, some amber) for the perfect harvest window.

Personal Experience of Pevgrow’s CEO (Alan)

GSC from Kannabia has been a staple in my personal grow rotation for its reliability and that standout flavor. It’s the plant I show to friends who think "all weed tastes the same." The lavender and mint combo is real—it’s not just marketing. In my setup, I’ve found she does best with a longer vegetative period if you have the space, really letting her structure establish before the flip. I run her in coco with a two-part nutrient system and the control it offers is perfect for her needs. The stretch after switching to 12/12 is no joke, so be ready to adjust your lights. My pro-tip? Don't rush the dry and cure. That unique terpene profile needs time to develop fully after chop. A proper 4-week cure in jars makes the minty-lavender notes absolutely sing. She’s not the easiest girl in the garden, but the payoff—in both yield and smoke—makes every bit of extra attention worth it.