Siberian Haze feminised seeds are a sativa-dominant cannabis seed strain that crosses AK-47, a select Haze, and Amnesia into one genuinely impressive plant. Kalashnikov Seeds have been quietly crossing AK-47 into new varieties for over 15 years out of southern Russia, and this is one of their standout cuts — 22% THC, 65–75 day flowering, and yields up to 550g/m² indoors. For a three-way Haze hybrid, those numbers are not normal. Haze hybrids usually punish you with 11-week flowering and finicky stretch. Siberian Haze doesn't.
What makes Siberian Haze feminised seeds worth growing
Siberian Haze is a sativa-dominant Haze hybrid that gives you classic spicy Haze flavour without the 12-week marathon flowering time most Haze strains demand. The AK-47 backbone shortens the flowering window and tightens up the structure; Amnesia adds resinous punch; the Haze mother gives you the soaring, spice-forward character that made this family famous in the first place.
We've seen plenty of Haze crosses come through the shop over the years. Most of them either lean too hard on the Haze side (great smoke, terrible patience test) or get watered down by whatever they've been crossed with. Siberian Haze sits in the sweet spot — 65 to 75 days to finish, which is closer to a hybrid timeline than a pure Haze, and the 22% THC is properly measured rather than inflated marketing speak.
Outdoor growers in warm climates can push this to a staggering 1,200g per plant under good sun. That's the AK-47 vigour showing through. Indoors, 550g/m² is realistic with a decent setup and some patience during training.
Siberian Haze genetics: AK-47 x Haze x Amnesia
The three-way cross is what gives this strain its character. AK-47 is the workhorse — reliable, vigorous, resinous, and the reason Kalashnikov Seeds exist as a seed bank in the first place. A select Haze mother brings the spicy, soaring sativa terpene profile. Amnesia rounds it out with extra potency and that slightly citrus-tinged Haze sharpness.
According to a 2023 review in Cannabis: A Varied Plant with Endless Potential (PMC10308385), cannabis plants contain cannabinoids with a range of pharmacological properties — but the reason growers care about specific crosses like this one is terpene and cannabinoid expression, not the base plant. Siberian Haze leans sativa-dominant, which the healthline.com overview of sativa vs. indica (2024) describes as being generally associated with more invigorating effects compared to indica-leaning varieties.
Flowering, yield and grow difficulty
Siberian Haze flowers in 65 to 75 days indoors, which is genuinely quick for a Haze hybrid. Expect serious stretch in the first two to three weeks of flower — this is a sativa-leaning plant with Haze in its DNA, so it will double, sometimes triple, in height. Plan your vertical space before you flip to 12/12.
It's rated for intermediate to experienced growers. Not because it's fussy, but because you'll get much better results with some training. SCRoG (Screen of Green) is the method Kalashnikov themselves recommend — it flattens the canopy, spreads the bud sites evenly, and stops the plant from turning into one tall cola with a bunch of fluffy larfy side branches.
Indoor specs
| Flowering time | 65–75 days |
| THC | 22% |
| Yield indoor | Up to 550g/m² |
| Yield outdoor | Up to 1,200g per plant |
| Type | Sativa-dominant hybrid |
| Genetics | AK-47 x Haze x Amnesia |
| Seed type | Feminised |
| Pack size | 3 seeds |
| Grower level | Intermediate to experienced |
| Breeder | Kalashnikov Seeds (Russia) |
| Recommended method | SCRoG |
How Siberian Haze compares to other Haze hybrids
The honest comparison: if you want a pure Haze experience and don't care about waiting three months, there are more classic options out there. If you want Haze flavour and effect in a flowering window that doesn't test your patience, Siberian Haze is one of the better picks we've seen.
| Strain | Flowering | THC | Yield indoor |
|---|---|---|---|
| Siberian Haze (Kalashnikov) | 65–75 days | 22% | Up to 550g/m² |
| Typical pure Haze | 77–84 days | 18–22% | 400–500g/m² |
| Amnesia Haze | 70–84 days | 20–22% | 500–600g/m² |
How to grow Siberian Haze feminised seeds
SCRoG is the method that gets the most out of this plant. Here's how we'd approach it.
- Germinate the seeds using the paper towel method or direct to a small rooting plug. All three seeds are feminised, so every plant you grow will flower — no males to cull.
- Veg for 3–5 weeks under 18/6. Top the plant once at the 4th or 5th node to encourage lateral growth.
- Install a SCRoG net roughly 25–30cm above the pot. As the plant grows, tuck branches through the squares to fill out the canopy horizontally.
- Flip to 12/12 when the canopy is about 70% full. Expect the plant to keep filling in for another two to three weeks as stretch finishes.
- Feed moderately — AK-47 genetics tolerate feeding well, but the Haze side prefers a lighter hand in early flower. Ramp up nutrients gradually.
- Flush in the final 10–14 days. Harvest when 70–80% of pistils have darkened and trichomes are mostly cloudy with a few amber.
- Dry slowly at 18–20°C and 55–60% humidity for 10–14 days, then cure in glass jars for at least 3 weeks. Haze hybrids reward patience in cure — the spicy, peppery terpenes sharpen up after a month.
About Kalashnikov Seeds
Kalashnikov Seeds are based in southern Russia and have spent 15+ years working AK-47 into every cross you can think of. They're not a hype brand — they've built their catalogue slowly, working with stable genetics and releasing strains when they're actually ready. Siberian Haze, Purple Russian Express, Kuban Killer — the catalogue has a distinct character, and it's always AK-47 doing the heavy lifting somewhere in the pedigree.
Complete your setup: pair Siberian Haze with a SCRoG net and a 600W HPS or equivalent LED. A carbon filter is not optional with Haze hybrids — this plant is pungent in late flower, and the spicy terpene profile travels. If you're growing in a tent, an 80x80 minimum gives the stretch room it needs.
Honest limitations to know before you buy
This isn't the strain to pick for your first grow. The stretch is serious, the flowering window is longer than an autoflower or a pure indica, and you'll get much less out of it without training. If you've never topped a plant or used a SCRoG net, start with something more forgiving and come back to this one.
Second thing: Haze hybrids are loud. The terpene profile is spicy, sharp, and carries. Budget for a proper carbon filter — your neighbours will notice otherwise.
Frequently Asked Questions
What does Siberian Haze taste like?
Classic spicy Haze on the inhale with subtle fruity and peppery notes from the AK-47 and Amnesia side. The cure really sharpens the terpene profile — give it at least three weeks in jars before judging.
Are Siberian Haze seeds feminised?
Yes. All three seeds in the pack are feminised, so every plant will flower. No males to identify and cull mid-grow.
How long does Siberian Haze take to flower?
65 to 75 days indoors. That's fast for a Haze hybrid — most pure Haze strains push 11 to 12 weeks.
Is Siberian Haze good for beginners?
Not really. Kalashnikov rates it intermediate to experienced. The stretch, flowering length, and the fact that SCRoG training is where it really shines all mean a first-time grower will get mediocre results. Grow a couple of easier strains first.
What yield can I realistically expect?
Up to 550g/m² indoors with SCRoG and a decent light setup. Outdoors in warm climates, well-trained plants can push up to 1,200g each — but that's the top end under ideal sun and soil.
Why SCRoG specifically?
Sativa-dominant Haze hybrids stretch hard and tend to grow one tall main cola with fluffy side branches. A SCRoG net flattens the canopy, spreads the bud sites evenly, and turns that one cola into 15–20 evenly developed tops. Much better yield per watt.
Last updated: April 2026
