Amur Giant Auto Seeds – Sativa-Dominant Autoflower with Jack Herer & Power Plant Genetics

The Amur Giant Auto from Kalashnikov Seeds is a towering autoflowering sativa that delivers legendary genetics and powerful, uplifting effects in a fast and reliable package. This strain is your direct route to a massive, resinous harvest of high-quality sativa buds without the long wait.

Do you crave that classic, soaring sativa high but get frustrated by the unpredictable flowering times and finicky nature of some photoperiod sativas? You plant, you wait, you adjust... and still, the results can vary wildly from one grow to the next. This inconsistency steals your confidence, wastes your time tweaking nutrients and light schedules, and leaves you guessing what went wrong. The Amur Giant Auto solves this by offering a genetically stabilized autoflowering version of elite sativa lineage, guaranteeing a consistent, repeatable harvest of potent, creative-fueling buds every single time.

Why Amur Giant Auto Delivers Predictable, Powerful Results

This strain's consistency comes from its brilliant genetic construction. By crossing the iconic Jack Herer and Power Plant with a cultivated Amur Ruderalis, Kalashnikov Seeds locked in the autoflowering trait while preserving the sativa-dominant effects and robust structure. The Ruderalis genetics contribute exceptional resilience against fungal diseases and stem tilting, meaning your plants stay healthy and upright from start to finish. You get the predictable 68-75 day seed-to-harvest timeline of an autoflower, paired with the reliable sativa effect and impressive yield you'd expect from its famous parents.

Key Factors for Consistent Growth and How to Control Them

• Light Schedule: As an autoflower, it thrives under 18-20 hours of light daily from germination to harvest. This constant schedule eliminates the guesswork of when to flip to 12/12, making your grow cycle incredibly straightforward.
• Pot Size & Transplanting: Start your seeds in a small pot and transplant to their final home—ideally an 18-27 L (4.7-7.1 gal) pot—early to avoid stunting. A good quality, well-aerated root stimulator can help ensure a smooth transition and vigorous root development.
• Nutrient Management: Autoflowers prefer a lighter feeding schedule than photoperiod plants. Start with a mild base nutrient and increase gradually. Overfeeding is a common mistake that leads to inconsistency.
• Environmental Stability: Maintain stable temperatures (22-26°C / 71-79°F during growth) and gradually lower humidity from 60-70% in seedling stage to 40-50% in late flowering to prevent mold and ensure even development.
• Training Technique: This tall plant responds well to Low-Stress Training (LST) to control height and maximize light exposure to lower bud sites. Avoid topping or other high-stress techniques that can shock autoflowers.

Recommended Routine for Reliable Harvests Every Time

1. Germinate with Care: Use a reliable method (paper towel or direct sow) at 22-25°C (72-77°F). A healthy start sets the stage for the entire cycle.
2. Establish Strong Roots: After germination, focus on root development with mild watering and a product like mycorrhizal inoculant to boost nutrient uptake and plant health from the beginning.
3. Guide Vegetative Growth: Under 18-20 hours of light, provide balanced nutrients and begin gentle LST if desired to create an even canopy.
4. Support the Flowering Stretch: As flowering begins around week 3-4, the plant will stretch significantly. Ensure adequate support and switch to a bloom-focused nutrient regimen.
5. Monitor Ripening: In the final weeks, watch the trichomes. Harvest when most are milky white for a more energetic high, or wait for some amber for a more relaxed effect. Flush with plain water for the last 7-10 days.
6. Dry & Cure Properly: Dry slowly at 18-22°C (64-72°F) and 50-60% RH for 10-14 days, then cure in jars for at least 2-4 weeks to perfect flavor and potency.

Advantages and Benefits of Growing Amur Giant Auto

• Speed & Simplicity: Harvest massive sativa buds in just 68-75 days, with no need to change light cycles.
• Predictable Size: Despite its "Giant" name, its autoflowering nature keeps it manageable indoors at 1.0-1.5 m (3.3-4.9 ft), while outdoors it can reach even greater heights.
• Built-in Resilience: The Amur Ruderalis genetics provide natural resistance to common issues, making for a more forgiving grow.
• Strain Consistency: Get the same lemon-sandalwood and wild berry jam flavor profile and powerful, creative effect from every plant.
• High Yield Potential: Achieve up to 600 g/m² (1.97 oz/ft²) indoors or 60-300 g (2.12-10.58 oz) per plant outdoors with proper care.
• Daytime Companion: Its uplifting, focus-enhancing effect is perfect for creative projects, socializing, or tackling tasks without sedation.

Technical Specifications

• Breeder: Kalashnikov Seeds
• Type: Autoflowering Feminized
• Genetics: Amur Ruderalis x (Jack Herer x Power Plant)
• Dominance: Sativa (60% Sativa, 30% Indica, 10% Ruderalis)
• Total Cycle (Seed to Harvest): 68-75 days
• Indoor Yield: 450-600 g/m² (approx. 1.48-1.97 oz/ft²)
• Outdoor Yield: 60-300 g/plant (2.12-10.58 oz)
• Indoor Height: 1.0-1.5 m (3.28-4.92 ft)
• THC Level: Approx. 19%
• Aromatic Profile: Lemon, Sandalwood, Wild Berries
• Effect: Uplifting, Creative, Focused, Euphoric
• Resistance: Good resistance to fungal diseases and stem tilting

Frequently Asked Questions

How do I know if I'm growing Amur Giant Auto correctly?

Look for vigorous early growth and a strong sativa structure with long internodes. During flowering, you should see a significant stretch and the development of large, dense buds that develop a yellow-orange hue and thick resin coating in the final weeks. If growth seems stunted, check your watering habits and ensure you're not overfeeding.

What should I do if the plants are growing too tall for my indoor space?

Implement Low-Stress Training (LST) early in the vegetative stage (around week 3). Gently bend the main stem and tie it down to encourage lateral growth and create a more even, bushy canopy. This controls height and increases light penetration to all bud sites.

When is the best time to harvest for the most energetic effect?

For a clear, cerebral, and creative high, harvest when the trichomes on the buds are mostly milky white with very few amber ones. This typically occurs earlier in the harvest window. Waiting for more amber trichomes will produce a heavier, more relaxing effect.

Personal Experience of Pevgrow’s CEO (Alan)

I'm a huge fan of sativa effects, but I don't always have the patience or space for a 14-week flowering photoperiod. That's why Amur Giant Auto is a staple in my personal garden. The consistency is remarkable; every seed expresses those classic Jack Herer and Power Plant traits reliably. I run them in 22 L (5.8 gal) pots with a light soil mix and a simple nutrient schedule, under 20 hours of light. The stretch is real—they easily hit 1.3 m (4.3 ft) for me—so I always use a soft scrog net to support the heavy colas. The smell in the tent is incredible, like a lemon grove mixed with incense and berry jam. The high is exactly what I look for: mentally stimulating and perfect for a long day of work or a creative session, without any couch-lock. For any grower wanting a trustworthy, heavy-yielding auto that delivers a true sativa experience, this is a top-tier choice.