Pure Kush
Cannabis seeds
by Greenhouse Seeds
Pure Kush Feminised Cannabis Seeds by Greenhouse Seeds
Pure Kush is a feminised Indica cannabis seed that delivers exactly what the name promises — an unadulterated OG Kush experience with serious yield potential. Greenhouse Seeds selected a standout OG Kush phenotype displaying reddish-pink hues across the calyxes and stigmas, then stabilised it into a feminised seed that beginners can grow with confidence. With 19% THC and the potential for 900g/m² indoors, this is a proper Kush that rewards patience with heavy, trichome-drenched harvests.
Pack Sizes
| Pack | Seeds | Best For |
|---|---|---|
| 3 Seeds | 3 feminised | Single-plant growers or first-time runs |
| 5 Seeds | 5 feminised | A full ScrOG canopy or outdoor plot |
| 10 Seeds | 10 feminised | Pheno hunting or multiple cycles |
All seeds are feminised, so every seed should produce a flowering female. If you're running a ScrOG setup — and we'd recommend you do with this strain — 3 to 5 seeds will fill an 80x80cm tent nicely once trained out.
Why Pure Kush Seeds Deserve a Spot in Your Grow Room
There are dozens of OG Kush crosses floating about, but Pure Kush strips things back to the source material. Greenhouse Seeds didn't hybridise this one into oblivion — they found an OG Kush phenotype with distinctive reddish-pink pistils and calyxes, locked it down, and let the genetics speak for themselves. The result is a plant that looks like it belongs on a magazine cover and produces like a commercial strain.
We've seen a lot of seeds labelled "beginner-friendly" that really aren't. Pure Kush actually earns that tag. She's not fussy about feeding schedules, responds well to training, and the 9-week flowering window is predictable. The one thing you do need to give her is a proper vegetative period. Rush the veg and you'll cap your yield well below that 900g/m² ceiling. Let her bush out — especially in a ScrOG net — and she'll fill every square centimetre of your canopy with dense, resinous colas.
The honest limitation? Nine weeks of flowering is on the longer side for an Indica. If you're used to 7-week strains, the extra fortnight can feel like an eternity when those buds are already looking ready at week 7. Resist the temptation. The final two weeks are where the trichome coverage goes from good to absolutely caked, and the terpene profile develops that nutty, sweet depth that makes Pure Kush worth growing in the first place.
Pure Kush Specifications
| Specification | Detail |
|---|---|
| Seed Bank | Greenhouse Seeds |
| Genetics | OG Kush (selected phenotype) |
| Type | Indica |
| Seed Type | Feminised |
| THC Content | 19% |
| Flowering Time | 9 weeks |
| Indoor Yield | Up to 900g/m² |
| Outdoor Yield | Up to 900g per plant |
| Outdoor Harvest | Early October |
| Recommended Setup | ScrOG |
| Appearance | Reddish/pinkish hues on calyxes and stigmas, heavy trichome coverage |
| Flavour Profile | Nutty, sweet |
| Available Packs | 3, 5, or 10 seeds |
Complete your grow setup: Pure Kush performs best in a ScrOG configuration, so a quality grow tent and trellis net are worth pairing with these seeds. If you're starting from scratch, check out our complete grow kits — they include tent, lighting, and ventilation in one box. For feeding, a bloom-stage nutrient set will help those dense colas reach their full 900g/m² potential.
Growing Pure Kush Seeds — What to Expect
Pure Kush is one of those strains that rewards you for doing the basics well rather than demanding advanced techniques. She's an Indica through and through — compact structure, broad fan leaves, and a natural inclination to bush outward rather than stretch vertically. That growth habit is exactly why Greenhouse Seeds recommends a ScrOG (Screen of Green) setup: weave those branches through a net during veg, and you'll expose every bud site to direct light.
The yield numbers are genuinely impressive. 900g/m² indoors puts Pure Kush in the upper tier of productivity, and 900 grams per plant outdoors is the kind of figure that makes outdoor growers sit up straight. But those numbers assume you've given the plant a generous vegetative period. We'd suggest at least 4 to 5 weeks of veg indoors, training into the ScrOG net throughout. Outdoors, plant early enough that she has the full growing season to develop into a large bush before flowering kicks in naturally.
During the 9-week flowering phase, you'll notice the signature reddish-pink colouring developing on the pistils and calyxes — it's genuinely striking, especially under white light. By week 6 or 7, the trichome production ramps up dramatically. Not just on the buds — even the small sugar leaves between the flowers get a thick coating of resin. If you're into making extracts or hash, those trim leaves are worth saving.
How to Grow Pure Kush Feminised Seeds
- Germinate your Pure Kush seeds using the paper towel method or directly in a starter plug. Maintain a temperature of around 22-25°C and keep the medium moist but not waterlogged. Taproots should emerge within 24-72 hours.
- Transplant seedlings into their final pots once they've developed 2-3 sets of true leaves. For ScrOG setups, 11-15 litre pots work well — large enough for a solid root system without wasting medium.
- Install your ScrOG net at approximately 40-50cm above the pot rim. During the vegetative phase (4-5 weeks minimum), use low-stress training to guide branches horizontally through the net. The goal is an even canopy with no single cola dominating.
- Switch to a 12/12 light cycle to trigger flowering. Pure Kush will stretch moderately in the first 2 weeks of flower — keep tucking branches under the net until the stretch stops.
- Maintain standard Indica feeding throughout the 9-week flowering period. Increase phosphorus and potassium during weeks 3-7 to support bud development. Watch for the trichomes to shift from clear to milky-white with some amber — that's your harvest window.
- Flush for the final 7-10 days with plain water to clear residual nutrients. Harvest when approximately 10-20% of trichomes show amber colouration for the heaviest body effect.
- Dry in a dark, ventilated space at 18-21°C and 55-60% humidity for 7-10 days. Cure in sealed glass jars for at least 2 weeks, burping daily for the first week. The nutty, sweet flavour profile develops significantly during a proper cure.
Flavour and Effect — What Pure Kush Delivers
The dried flower carries a distinctly nutty and sweet aroma that intensifies when you break the buds apart. It's not the sharp, fuel-forward OG Kush profile you might expect — this phenotype leans more towards a warm, almost toasted nuttiness with a sweet undertone. In a vaporiser, the sweetness comes through more clearly on the first draw, with the nutty depth building as the session progresses.
At 19% THC, Pure Kush sits in a comfortable sweet spot — strong enough to deliver a full-bodied Indica effect without launching inexperienced users into orbit. The onset is physical and immediate. Your muscles relax, tension drops away, and there's a noticeable heaviness that settles into your limbs. This is very much a seated experience. If you've got plans that involve standing up and being productive, save Pure Kush for later.
Compared to something like Royal Queen Seeds' OG Kush, which tends to carry more of a hybrid character with cerebral uplift, Pure Kush commits fully to the Indica side. There's minimal head activity — it's all body. Consume more and the sedative quality deepens considerably, making it a strong choice for evening use when you're ready to wind down completely.
Frequently Asked Questions
Is Pure Kush suitable for beginner growers?
Yes. Pure Kush is genuinely beginner-friendly — she's not demanding with nutrients, handles minor environmental fluctuations well, and has a predictable 9-week flowering schedule. The main thing to get right is giving her enough vegetative time before flipping to flower.
What is the best setup for growing Pure Kush?
Greenhouse Seeds specifically recommends ScrOG (Screen of Green). Pure Kush's bushy Indica structure responds brilliantly to horizontal training through a net, which exposes more bud sites to direct light and helps you reach that 900g/m² yield potential.
How long does Pure Kush take to flower?
Pure Kush requires 9 weeks of flowering from the switch to 12/12 light. That's slightly longer than some Indica strains, but the extra time allows the trichome coverage and terpene profile to develop fully. Outdoors, expect to harvest in early October.
Can Pure Kush be grown outdoors?
Absolutely. Outdoors, Pure Kush can yield up to 900 grams per plant when given a full growing season to vegetate into a large bush. She'll be ready for harvest in early October in most European climates. Plant early to maximise vegetative growth.
What does Pure Kush taste like?
Pure Kush has a nutty and sweet flavour profile — think warm, toasted nuttiness with a gentle sweetness underneath. It's less fuel-forward than many OG Kush varieties. The flavour develops best after a proper 2-week cure in sealed jars.
How strong is Pure Kush?
With 19% THC, Pure Kush delivers a potent but manageable Indica effect. It's strong enough for experienced users to appreciate but won't overwhelm someone with moderate tolerance. The effect is heavily physical — deep relaxation with pronounced sedative qualities at higher consumption.
Why do Pure Kush buds have pink and red colours?
The reddish-pink hues on Pure Kush's calyxes and stigmas (pistils) are a genetic trait of this specific OG Kush phenotype selected by Greenhouse Seeds. It's not a sign of stress or deficiency — it's simply what this plant does naturally, and it looks brilliant under white light.
Last updated: April 2026
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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.