Beasty (T.H.Seeds™)
Cannabis seeds
by T.H. Seeds
Beasty Cannabis Seeds by T.H. Seeds
Beasty is a feminised cannabis seed from T.H. Seeds that crosses Gemelo (GMO x Gelatti Kushmints) with Pure Afghan to produce a resin-drenched hybrid built for heavy harvests and bold flavour. If you've been chasing a strain that fills your jars with dense, trichome-caked buds and fills the room with a gassy, cookie-diesel funk the moment you crack a nug open, this is the one. T.H. Seeds have been operating out of Amsterdam since the mid-'90s — we've stocked their genetics for years and they consistently deliver stable, well-bred lines. Beasty is no exception.
The genetics here tell the story. On the Gemelo side you get GMO's garlic-gas punch crossed into Gelatti Kushmints — that's where the cookies-and-diesel terp profile comes from. The Pure Afghan parent brings old-school resin production and structural stability. The result is a 65% sativa / 35% indica hybrid that grows like a Christmas tree, stretches hard in early flower, and then stacks weight on every branch for the remaining weeks. It's a hash maker's dream, frankly — the trichome coverage on mature Beasty buds is thick enough to scrape.
Beasty Seed Variants — 3 or 6 Pack
Beasty feminised seeds come in two pack sizes:
| Pack | SKU | Best for |
|---|---|---|
| 3 seeds | CSTS0086 | A single run or a test grow to see how she performs in your setup |
| 6 seeds | CSTS0066 | Selecting the best phenotype or filling a full canopy — you'll want the extra plants to pick from |
We'd go with the 6-pack if you're serious about pheno hunting. Beasty's Gemelo lineage can throw slightly different expressions — some leaning gassier, some sweeter — and having six plants to choose from means you can keep the standout cut.
Beasty Growing Specifications
| Specification | Detail |
|---|---|
| Seed type | Feminised |
| Genetics | Gemelo (GMO x Gelatti Kushmints) x Pure Afghan |
| Sativa / Indica | 65% / 35% |
| Flowering time | 9–10 weeks |
| Height (indoor) | 110–160 cm |
| Yield (indoor) | Up to 650 g/m² |
| Yield (outdoor) | Comparable to indoor — strain-dependent on climate |
| Structure | Christmas tree shape, rapid early stretch |
| Trichome production | Very heavy — suited for hash and extraction |
| Breeder | T.H. Seeds (Amsterdam) |
Running Beasty in a tent? Pair her with a good carbon filter — the gassy diesel terps on this strain will announce themselves to your entire building by week 5 of flower. If you're planning to make hash from those resin-heavy trimmings, a set of bubble bags or a dry sift screen will let you put all that trichome production to proper use.
Why Beasty Cannabis Seeds Deserve Space in Your Grow Room
There are a lot of cookie-gas crosses floating around right now. Half of them are unstable, half produce airy buds that look great on Instagram but weigh nothing on the scale. Beasty isn't that strain. The Pure Afghan backbone gives her density and resin production that most modern hybrids simply don't have. We're talking buds that feel heavy in your hand — light green, compact, and coated in a visible layer of frost that makes trimming a sticky affair.
The yield ceiling of 650 g/m² indoors is genuinely impressive for a 9–10 week flower. That puts Beasty in the same weight class as strains that take 11–12 weeks to finish. You're saving time without sacrificing harvest size. Outdoor growers in warmer climates can expect similar returns, though she'll stretch taller without a ceiling to stop her.
The one thing to watch: Beasty stretches aggressively in the first 2–3 weeks of flowering. If you're growing in a tent with limited headroom, flip to 12/12 earlier than you normally would. She can nearly double her height in that initial stretch phase. Topping once or twice during veg and pinching lateral branches until week 3 of flower keeps her manageable — T.H. Seeds specifically recommend this approach, and from what we've seen, it works. Without training, she'll push past 160 cm and start competing with your lights for space.
How to Grow Beasty Cannabis Seeds
- Germinate your Beasty seeds using your preferred method — paper towel, direct sow, or jiffy pellets all work. Taproot should appear within 24–72 hours.
- Transplant seedlings into their final containers once the first true leaves develop. Beasty responds well to 11–15 litre pots for indoor grows.
- During vegetative growth, top the main stem once or twice to encourage lateral branching. This controls height and creates more bud sites across the canopy.
- Flip to 12/12 lighting when plants reach roughly 50–70 cm — she'll stretch to 110–160 cm during the first few weeks of flower.
- Pinch lateral branches until the end of week 3 of flowering to maintain an even canopy and direct energy into the main cola sites.
- Feed generously throughout flower. Beasty is a hungry plant — she rewards proper nutrition with denser buds and heavier resin production.
- Monitor trichomes from week 8 onwards. Harvest when trichomes shift from clear to mostly milky with some amber, typically around weeks 9–10.
- Dry in a dark, well-ventilated space at 18–20°C and 55–60% humidity for 10–14 days. Cure in glass jars for at least 2 weeks to bring out the full cookie-gas-diesel terp profile.
Flavour, Aroma, and Effects of Beasty
This is where Beasty really earns its name. Crack open a cured jar and you get hit with a wall of gas and diesel, layered over a sweet cookie base with a faint citrus edge hiding underneath. It's bold — not subtle, not "hints of." The GMO genetics in the Gemelo parent are loud, and the Afghan side adds an earthy, hashy depth that rounds out the nose. If you've grown GMO crosses before, imagine that garlic-fuel funk with a sweeter, more biscuity finish. That's Beasty.
The effects lean heavily sedative. This is an evening strain — the kind that pins you to the sofa with a warm, heavy body sensation and gradually pulls you toward sleep. The indica influence from the Pure Afghan parent is unmistakable here. It's not a creeper either; the onset is direct and strong. Casual users should approach with respect. Experienced smokers will appreciate the depth — there's a pleasant mental haze that pairs well with music, a film, or simply doing absolutely nothing for a few hours.
One honest note: if you're after a daytime, functional smoke, Beasty isn't it. Despite the 65% sativa genetics, the effect profile leans firmly toward couch-lock territory. The sativa influence shows up more in the plant's growth structure and vigour than in the high itself.
Frequently Asked Questions
Is Beasty sativa or indica?
Beasty is a 65% sativa / 35% indica hybrid. The sativa genetics influence the plant's tall, Christmas tree-like growth structure and vigorous stretch, while the indica Afghan parent dominates the effect profile with heavy sedation and body relaxation.
How long does Beasty take to flower?
Beasty finishes flowering in 9–10 weeks. Check trichomes from week 8 — most growers harvest around the 9.5-week mark when trichomes are mostly milky with some amber.
What yield can I expect from Beasty indoors?
With proper feeding and training, Beasty can produce up to 650 g/m² indoors. Topping once or twice and pinching lateral branches until week 3 of flower helps maximise this. Outdoor yields tell a similar story in favourable climates.
Is Beasty a good strain for making hash?
Yes — Beasty is one of the better options for hash production. The Pure Afghan genetics give her exceptionally heavy trichome coverage, and the dense bud structure means even the trim is worth processing. Bubble hash and dry sift both work well with this strain.
How tall does Beasty grow indoors?
Expect 110–160 cm indoors. She stretches rapidly in the first 2–3 weeks of flowering, so flip to 12/12 when she's around 50–70 cm if headroom is limited. Topping during veg helps control final height.
What does Beasty taste like?
Beasty delivers a bold mix of cookies, gas, and diesel with a subtle citrus undertone. The GMO lineage in the Gemelo parent drives the gassy, fuel-forward flavour, while the Afghan genetics add an earthy, hashy depth. It's loud — not a strain for discreet smoking.
How does Beasty compare to other T.H. Seeds strains?
Beasty sits at the heavier end of the T.H. Seeds catalogue. Compared to their more balanced hybrids, Beasty leans harder into sedation and resin production. If you want a similarly potent but more uplifting option, look at their sativa-dominant lines — but for evening use and hash making, Beasty is the stronger pick.
Last updated: April 2026
Related products
You might also like
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.