🍪 Growing Girl Scout Cookies Autoflower: Timeline, Soil, Nutrients & Yield TipsUpdated 13 days ago
Girl Scout Cookies Autoflower is a fast-flowering, indica-dominant hybrid known for its sweet flavor, potent effects, and ease of growth. This guide covers essential grow details, including soil, nutrients, training techniques, and timing for the best yield and potency.
Key Characteristics
Type: Indica-dominant autoflower
THC: Up to 24%
Grow time: 8–10 weeks from sprout
Size: 2–4 feet tall
Yield: 4–6 oz per plant outdoors; up to 6 oz/m² indoors
Ideal Soil Setup
Girl Scout Cookies autoflowers perform best in light, well-draining soil with moderate nutrient content.
Recommended soil mix:
60% organic potting soil or coco coir
20% perlite or pumice for drainage
20% compost or worm castings
Optional: Add mycorrhizae or microbial inoculants to boost root health
Avoid soils with time-release fertilizers, as they can overfeed young autos and stunt growth.
Nutrient Schedule by Growth Stage
| Stage | Timeline | Nutrients | Notes |
|---|---|---|---|
| Seedling | Week 1 | Root booster / microbials | No NPK nutrients yet |
| Vegetative | Weeks 2–4 | Nitrogen-heavy veg formula | Start low (¼ strength), increase slowly |
| Pre-Flower | Week 4–5 | Balanced transition formula | Begin tapering off nitrogen |
| Full Flower | Weeks 5–8 | Bloom booster (high P + K) | Avoid excess nitrogen |
| Flush | Final 7–10 days | pH-balanced water only | Enhances flavor and smoothness |
Use a feed–water–water cycle to avoid nutrient buildup. Maintain pH around 6.2–6.5 in soil, 5.8–6.2 in coco.
Light & Training
Light cycle: 18/6 or 20/4 throughout
Light type: Full-spectrum LED or HPS
Training: Use low-stress training (LST) during weeks 2–4
Avoid topping or high-stress techniques — autos have limited recovery time
Environmental Conditions
Temperature: 70–78°F (21–26°C)
Humidity:
65% (seedling)
55% (veg)
40–45% (flower)
Maintain good airflow and avoid excessive humidity in flowering to prevent mold.
Harvest Timing
Check trichomes with a jeweler’s loupe:
Cloudy trichomes = peak THC
Amber trichomes = stronger body effects
Most GSC autos are ready around day 70–75. Flush for the last 7–10 days before harvest.