AK 420 Feminized Cannabis Seeds – Seed Stockers · High-Yielding Sativa-Dominant Strain with 22%+ THC

AK 420 feminized cannabis seeds from Seed Stockers deliver a top-shelf sativa-dominant experience with massive yields, 22%+ THC, and beginner-friendly growth—perfect for high-impact results without the hassle.

Overwhelmed by complicated strains that promise big but deliver stress? You’re not alone. Many growers start strong, only to face weak yields, inconsistent potency, or plants that demand constant attention. It’s frustrating when your effort doesn’t match the results, and you start wondering if the strain is even worth it.

That confusion and wasted time? Totally avoidable. AK 420 cuts through the noise with a straightforward grow cycle, rock-solid genetics, and a high that hits just right. This isn’t just another AK clone—it’s a refined version built for real-world conditions, delivering fat, resinous buds in just 8 weeks of flowering, whether you're growing in a tent or under the sun.

Technical specifications

• Breeder / Brand: Seed Stockers
• Type: Feminized
• Dominance: Sativa-dominant (60%+ Sativa)
• Genetics / Cross: AK-47 (Colombia × Mexico × Thailand × Afghanistan)
• Flower period: 8 weeks
• Grow type: Indoor/Outdoor
• THC: Medium to high (14–22%)
• Yield: Huge — Indoor: +550 g/m² (1.94 oz/ft²); Outdoor: +350 g/plant (12.35 oz/plant)
• Height: Indoor: 80–110 cm (2.62–3.61 ft); Outdoor: 1.10–1.40 m (3.61–4.59 ft)
• Difficulty: Low — ideal for beginners
• Structure and vigour: Strong branching, moderate stretch during early flowering
• Effect: Active, uplifting, anti-anxiety — perfect for daytime use
• Flavor: Herbal, pine, with spicy and fruity undertones
• Smell in grow: Medium — a carbon filter is recommended for discretion

Why AK 420 dominates your grow room

• Delivers 22%+ THC for a powerful, clear-headed high that lifts mood and eases tension
• Produces dense, sticky buds that glisten with resin—perfect for smoking or extracting
• Thrives in almost any condition, from small tents to full outdoor gardens
• Flowers in just 8 weeks, making it one of the fastest sativa-dominant strains available
• Beginner-approved: robust growth means fewer mistakes and more confidence

How to grow AK 420 for maximum results

Get the most out of your AK 420 feminized seeds with this expert-backed grow guide. Simple, effective, and optimized for quality.

Quick overview

Seed Stockers’ AK 420 is a low-difficulty, high-reward feminized strain with an 8-week flowering cycle—ideal for indoor tents or outdoor gardens in temperate to Mediterranean climates.

• Perfect for beginners and space-limited growers
• Use soil or coco with good drainage
• Keep pH 6.0–6.5 (soil) or 5.8–6.2 (coco)
• EC progressive by growth stage
• Temperature: 22–26 °C (71.6–78.8 °F) in veg, 20–25 °C (68–77 °F) in flower
• Humidity: 60–70% seedling, 50–60% veg, 40–50% flower

Safe start

Begin with strong germination and early root development to set the stage for vigorous growth.

• Germinate seeds in moist paper towels at 22–25 °C (71.6–77 °F)
• Transplant when the taproot reaches ~1 cm (0.4 in)
• Use small pots (3–7 L) for the first week
• Inoculate with mycorrhizae to boost root resilience
• For a hassle-free start, Bio Rhizotonic speeds up rooting and reduces transplant stress.

Directed growth

Guide your plants through vegetative growth with proper light, spacing, and light training.

• Use 18/6 light cycle indoors
• Allow 2–4 weeks of veg depending on space
• Train gently with LST to expose bud sites
• Avoid topping—AK 420 responds better to low-stress techniques
• In sustained growth, SensiZym Advanced Nutrients keeps leaves green and structure compact.

Efficient flowering

Switch to 12/12 light cycle and support bud development with proper nutrition and airflow.

• Expect a slight stretch in the first 1–2 weeks of flowering
• Support branches with stakes if needed
• Maintain RH at 40–50% to prevent mold
• Boost flowering with a PK booster in weeks 4–6
• At the end of flowering, Top Bud helps with density and a cleaner taste.

Harvest and refinement

Time your harvest for the perfect balance of cerebral and physical effects.

• Harvest when 70–80% of trichomes are milky, 20–30% amber for a balanced high
• Flush plants 7–10 days before harvest
• Dry slowly at 18–22 °C (64.4–71.6 °F) and 50–60% RH
• Cure in glass jars for 2–4 weeks, burping daily
• Proper curing enhances flavor and smoothness

Frequently Asked Questions

How long does AK 420 take to flower?

AK 420 has a flowering period of 8 weeks, making it a fast finisher for a sativa-dominant strain.

Is AK 420 good for beginners?

Yes—its robust growth, resistance to stress, and forgiving nature make AK 420 ideal for novice growers.

What’s the THC level of AK 420?

THC ranges from 14% to 22%, with many phenotypes testing at 22%+, delivering a potent, uplifting high.

Can I grow AK 420 outdoors?

Absolutely. It thrives in warm, sunny climates and can reach up to 1.40 m (4.59 ft) tall, producing over 350 g (12.35 oz) per plant.

Does AK 420 smell strong during grow?

It has a medium odor—fruity and spicy—so a carbon filter is recommended for discreet indoor grows.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve grown dozens of AK phenotypes, but Seed Stockers’ AK 420 stands out for its consistency. I ran it under a 600W HPS in an 80x80 cm (2.62x2.62 ft) tent with 11L pots. Vegged for 3 weeks, switched to 12/12, and harvested in exactly 8 weeks. Yield was 580 g/m² (20.46 oz/ft²)—dense, frosty buds with a piney punch and a high that’s energizing without anxiety. I didn’t top any plants, just used LST, and they responded perfectly. The best part? Zero mold, even in mid-flower humidity spikes. If you want a no-drama, high-THC sativa that delivers every time, this is your strain.