Ztrawberry
Cannabis seeds
by Greenhouse Seeds
Ztrawberry Cannabis Seeds by Greenhouse Seeds
Ztrawberry is an indica-dominant hybrid cannabis seed strain from Greenhouse Seeds that crosses Runtz with AMS — fusing American candy-sweet genetics with Amsterdam's most dependable mould-resistant cultivar. The result is a fast-flowering, heavy-yielding plant that produces dense buds loaded with sweet berry and cream aromas, backed by THC levels exceeding 22%. Available in packs of 3, 5, and 10 seeds, plus a bulk 250-seed option for commercial growers.
Ztrawberry Seed Pack Sizes — Which One to Pick
Greenhouse Seeds offers Ztrawberry in four pack sizes. If you're running a single tent or growing a couple of plants outdoors, the 3-pack gives you enough to select a strong phenotype without committing to a full box. The 5-pack is the sweet spot for most home growers — enough seeds to pop a few, keep a mother if you find a standout, and still have spares. The 10-pack suits anyone running a proper SOG or SCROG setup where you want uniformity across the canopy. The 250-pack is strictly for licensed commercial operations looking to fill a greenhouse.
| Pack Size | SKU | Best For |
|---|---|---|
| 3 seeds | CSGH0275 | First-time growers, single-plant runs |
| 5 seeds | CSGH0276 | Home growers, pheno-hunting on a budget |
| 10 seeds | CSGH0277 | SOG/SCROG setups, experienced cultivators |
| 250 seeds | CSGH027 | Commercial cultivation, bulk operations |
Ztrawberry Genetics — Runtz Meets Amsterdam Resilience
The genetic backbone of Ztrawberry tells you everything about what to expect. On one side, you've got Runtz — the American new-school heavyweight that took the US market by storm with candy-sweet terpenes and brutal potency. On the other, AMS, a sturdy Amsterdam cultivar that Greenhouse Seeds has relied on for years thanks to its vigour, speed, and genuine resistance to mould and pathogens. AMS is the workhorse parent here. It gives Ztrawberry a strong, bushy structure with dark green foliage that handles temperature swings and humidity spikes without throwing a tantrum. Runtz contributes the flavour profile and the THC punch — the parts you actually care about once the buds are in the jar.
This combination isn't random. Greenhouse Seeds specifically paired these two to create something that performs in northern European climates (where mould can wipe out an outdoor crop in a wet October) while still delivering the terpene complexity and potency that modern smokers demand. We've seen plenty of American genetics that look incredible on paper but fall apart the moment they hit a Dutch autumn. Ztrawberry doesn't have that problem.
Ztrawberry Growing Specifications
| Specification | Detail |
|---|---|
| Seed Bank | Greenhouse Seeds |
| Genetics | Runtz x AMS |
| Type | Indica-dominant hybrid |
| THC Content | 22%+ |
| Indoor Flowering Time | 8-9 weeks |
| Outdoor Harvest | Mid-October |
| Plant Height | 160-280cm |
| Max Outdoor Yield | Up to 1200g/plant |
| Structure | Strong, bushy, dark green leaves |
| Mould Resistance | High (AMS parentage) |
| Seed Type | Feminised |
Running Ztrawberry indoors? Pair these seeds with a complete grow tent kit — tent, lighting, ventilation, and carbon filter in one box. Outdoor growers dealing with heavy autumn rains should look at our plant support stakes and netting to keep those heavy colas from snapping branches. A decent pH meter is also worth grabbing; Ztrawberry's vigour means she feeds hard, and pH drift is the fastest way to lock out nutrients.
Why Ztrawberry Seeds Deserve a Spot in Your Garden
Here's the honest pitch: there are hundreds of cookie-cutter strains floating around right now that promise huge yields and insane flavour. Most of them are unstable crosses that produce five different phenotypes from five seeds, half of which stretch into unmanageable monsters. Ztrawberry is different because both parents are proven performers with years of breeding behind them. AMS has been a Greenhouse Seeds staple for a reason — it just works. And Runtz has been stress-tested by every serious breeder in the US. When you cross two stable, well-documented genetics, you get predictable results. That matters when you're investing weeks of electricity, nutrients, and attention into a grow.
The yield potential is genuinely impressive. Up to 1200g per plant outdoors is not a number Greenhouse Seeds throws around lightly — that's with optimal conditions, full sun, and a long vegetative period. Indoors, you'll get less, but the 8-9 week flowering time means you're not waiting around. For comparison, a lot of indica-dominant hybrids in this potency range ask for 10-11 weeks. Those extra two weeks add up in electricity costs and patience.
The one thing to watch: height. At 160-280cm, Ztrawberry can get tall. If you're growing in a 160cm tent, you'll need to top early and possibly run a SCROG net to keep the canopy flat. Left unchecked, she'll stretch into your lights and you'll lose the top colas to bleaching. Outdoor growers have more room to let her run, but even then, a plant pushing 280cm draws attention. Plan accordingly.
Ztrawberry Flavour and Aroma — Where Runtz Takes Over
This is where Ztrawberry really earns its name. While the AMS parent dominates in the grow room, it's the Runtz genetics that show up once you've dried and cured the buds. Crack open a jar and you get an immediate wave of sweet red fruit and berries — not artificial sweetness, but that genuine ripe-strawberry note that good Runtz cuts are famous for. Underneath, there's a creamy, almost vanilla-like base that rounds everything out, plus hints of zingy citrus and a touch of earth that stop it from being one-dimensional.
The smoke follows the nose. On the inhale, it's sweet and smooth with that berry-cream profile front and centre. The exhale brings out more of the citrus and earthy undertones. It's complex without being overwhelming — you don't need a sommelier's palate to appreciate what's going on here. If you've smoked good Runtz before, imagine that flavour profile but with a slightly earthier, more grounded finish courtesy of the AMS side. It's a genuinely enjoyable smoke, and that's not something we say about every strain that comes through.
How to Grow Ztrawberry Cannabis Seeds
- Germinate your Ztrawberry seeds using the paper towel method or directly in a propagation plug. Keep temperatures between 22-26°C and maintain high humidity (70-80%) until taproots emerge, typically within 24-72 hours.
- Transplant seedlings into their first pot (0.5-1L) once the taproot is 1-2cm long. Use a light, airy growing medium — coco-perlite mixes or a quality light-mix soil both work well. Ztrawberry's AMS genetics give her strong early vigour, so she'll outgrow a small pot quickly.
- Move to final containers (11-25L indoors, 30-50L+ outdoors) once the plant has 4-5 nodes. Top the main stem above the 3rd or 4th node to encourage lateral branching and control height — this is critical if you're growing indoors, given Ztrawberry's potential to reach 280cm.
- During vegetative growth, maintain 18/6 light cycle indoors. Feed with a balanced grow nutrient at moderate EC (1.2-1.6). Ztrawberry responds well to training techniques: LST, SCROG netting, or a combination of both will maximise your canopy coverage and light penetration.
- Flip to 12/12 to trigger flowering. Expect some stretch in the first 2-3 weeks — Ztrawberry can double in height during this phase. Keep defoliating lower growth that doesn't receive light to direct energy toward the top colas.
- Through the 8-9 week flowering period, switch to bloom nutrients and watch for the dense, bulbous buds that Ztrawberry is known for. Her mould resistance from the AMS side means you can push humidity a bit higher than usual without panic, but keep it below 50% in late flower to be safe.
- Harvest when 70-80% of trichomes are milky with 10-20% amber. Dry in a dark room at 18-20°C and 55-60% humidity for 10-14 days, then cure in glass jars for a minimum of 2 weeks. The berry and cream terpenes really develop during a proper cure — don't rush this step.
Frequently Asked Questions
What is the THC level of Ztrawberry?
Ztrawberry produces THC levels exceeding 22%. This is consistent across most phenotypes thanks to the stable Runtz and AMS parentage. Expect a strong, fast-acting effect that lasts several hours.
How tall does Ztrawberry grow?
Ztrawberry can reach between 160cm and 280cm depending on environment and training. Indoor growers should top early and use SCROG or LST to keep height manageable. Outdoors, she'll happily push toward the upper end of that range.
What is the flowering time for Ztrawberry seeds?
Ztrawberry flowers in 8-9 weeks indoors. Outdoor growers in the Northern Hemisphere can expect to harvest around mid-October. That's relatively quick for an indica-dominant hybrid with this level of yield potential.
How much does Ztrawberry yield?
Under optimal outdoor conditions, Ztrawberry can produce up to 1200g per plant. Indoor yields depend heavily on light intensity, pot size, and training, but the genetics support heavy production across the board.
Is Ztrawberry resistant to mould?
Yes. The AMS parent passes on strong mould and pathogen resistance, making Ztrawberry a solid choice for growers in humid or unpredictable climates. That said, no strain is bulletproof — keep airflow moving and humidity below 50% in late flower.
What does Ztrawberry taste like?
Ztrawberry delivers sweet red fruit and berry notes with a creamy, almost vanilla-like undertone. You'll also pick up hints of citrus and earth on the exhale. The Runtz parentage drives most of the flavour profile, and it really comes alive after a proper 2-week cure.
Can I grow Ztrawberry indoors in a small tent?
You can, but height management is non-negotiable. Top early, train aggressively, and flip to 12/12 before the plant gets above 40-50cm. A 160cm tent is tight for this strain without training — she'll stretch into your lights if you let her.
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.