Green Poison Auto by Sweet Seeds – 3rd Gen Autoflowering Powerhouse for Fast, Resinous Harvests

Green Poison Auto by Sweet Seeds is a powerful 3rd generation autoflowering strain that delivers fast, resin-heavy harvests in just 8 weeks from seed to harvest, perfect for growers who want big results without the wait.

Struggling to find a strain that fits both your schedule and your taste? One that doesn’t make you choose between speed and quality?

Most autoflowers promise fast harvests but fall short on flavor, potency, or yield. Others take too long or demand expert-level care. You end up compromising—either on time, quality, or effort.

Green Poison Auto bridges the gap. Bred from elite Green Poison® and Big Devil #2 Auto®, this strain gives you the best of both worlds: rapid growth without sacrificing the rich, complex experience you’re after. It’s not just fast—it’s fast and fantastic.

What Makes Green Poison Auto Stand Out

With THC levels between 15–20%, this indica-dominant hybrid (56.9% indica, 40% sativa, 3.1% ruderalis) delivers a balanced high that starts uplifting and quickly melts into deep relaxation—perfect for unwinding after a long day or enhancing a chill evening session.

• Fast 8-week life cycle from germination to harvest
• Indoor yields up to 550 g/m² (1.94 oz/ft²)
• Outdoor production up to 200 g/plant (7.05 oz/plant)
• Compact height: 0.60–1.00 m (1.97–3.28 ft), ideal for stealth grows
• Sweet, fruity taste with earthy cheese and mild skunk undertones
• Exceptional resin production for potent, long-lasting effects

How to Grow Green Poison Auto Successfully

Green Poison Auto thrives with minimal intervention, making it perfect for beginners and experienced growers alike who value consistency and quality.

Quick overview: 3rd gen autoflower · Sweet Seeds · ~8 weeks total · low difficulty · ideal for indoor tents or outdoor stealth setups.

Safe start: Germinate in a moist, dark environment at 22–25 °C. Transplant gently once the taproot reaches ~1 cm.

• Use a well-aerated soil or coco mix for strong root development
• Start in final pot (18–27 L) to avoid transplant stress
• Provide 18–20 hours of light daily throughout the cycle
• Water lightly at first—overwatering is the #1 beginner mistake
• Boost early resilience with Plagron Power Roots Root Stimulator for faster establishment

Directed growth: This strain grows vigorously with thick stems and strong branching—no need for topping or aggressive training.

• Keep pH between 6.0–6.5 (soil) or 5.8–6.2 (coco/hydro)
• Feed lightly—autos are sensitive to nutrient burn
• Ensure good airflow to prevent humidity buildup
• Support heavy colas late in flowering with soft ties
• Enhance root zone health with Silent Seeds beneficial microbes for stronger uptake

Efficient flowering: From week 5, buds swell fast and trichomes explode. Reduce humidity to 40–50% to protect dense flowers.

• Watch trichomes: harvest when milky with some amber for balanced effect
• Flush 7–10 days before harvest for smoother smoke
• Boost resin and density with Jungle Juice Bloom Advanced Nutrients
• Avoid defoliation—this strain handles itself
• Dry slowly at 18–22 °C and 50–60% RH for maximum flavor

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Autoflowering
• Genetics: Green Poison® × Big Devil #2 Auto®
• Dominance: Indica-dominant hybrid (56.9% indica, 40% sativa, 3.1% ruderalis)
• Total cycle: 8 weeks from germination
• Indoor yield: 400–550 g/m² (1.41–1.94 oz/ft²)
• Outdoor yield: 35–200 g/plant (1.23–7.05 oz/plant)
• Height: 0.60–1.00 m (1.97–3.28 ft)
• THC: 15–20%
• CBD: 0.6%
• Difficulty: Low
• Structure: Strong branching, dense bud sites
• Resistance: High resistance to pests and mold (including botrytis)
• Training: Responds well to LST; avoid topping
• Recommended pot: 18–27 L final pot from start
• Light cycle: 18–20 h daily
• Flavor: Fruity, sweet, skunk, earthy, cheese
• Effect: Relaxing, euphoric, psychoactive, mildly stimulating

Frequently Asked Questions

Is Green Poison Auto good for beginners?

Yes. With its fast cycle, high resistance to stress, and forgiving nature, it’s one of the best autoflowers for new growers.

Does it smell strong during flowering?

It has a medium to strong aroma—fruity and skunky. Use a carbon filter if growing indoors discreetly.

Can I grow it outdoors in colder climates?

Absolutely. Its ruderalis heritage gives it solid tolerance to cooler temperatures and variable weather.

How many seeds should I start with?

Due to Sweet Seeds’ high germination rate, 1–2 seeds are often enough. But many growers start with 3 to ensure at least two strong plants.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Green Poison Auto last summer in my small balcony setup—just a 20L pot and a 250W LED. No fancy tricks, no LST, no topping. I let it do its thing. By week 8, it was dripping in resin, with thick, dense colas that smelled like citrus candy and forest floor. I harvested just under 180 g (6.35 oz) of dry bud—insane for an auto in that space. The high was smooth: first a wave of happiness, then deep physical relaxation. I used it every evening for a week and slept better than ever. What sold me was the consistency—no weak phenos, no stretchers, no mold. Just pure, reliable performance. If you want an auto that actually delivers on all fronts, this is it.