Ice
Cannabis seeds
by Royal Queen Seeds
ICE Feminised Cannabis Seeds by Royal Queen Seeds
ICE (Indica Crystal Extreme) is a feminised cannabis seed from Royal Queen Seeds that crosses three legendary Indica strains — Skunk, Northern Lights, and pure Afghan — into one resin-drenched hybrid. With THC levels approaching 20% and buds so coated in trichomes they look frosted, this compact plant delivers dense, sticky harvests in as little as 8 weeks. If you want a proven genetic line that performs indoors without taking over your grow space, ICE belongs on your shortlist.
Pack Size Guide
ICE feminised seeds come in packs of 1, 3, 5, or 10. Running a single plant to test the genetics? Grab a 1-pack. Planning a full canopy in an 80x80 or 100x100 tent? The 5-pack or 10-pack gives you room to select the strongest phenotypes and fill your space properly. We'd go with the 3-pack as the sweet spot for most home growers — enough to pick a winner without overcommitting.
| Pack | Seeds | Best For |
|---|---|---|
| 1 | 1 seed | Pheno-hunting or a single test run |
| 3 | 3 seeds | Small tent, pick the best plant |
| 5 | 5 seeds | Full canopy in a medium tent |
| 10 | 10 seeds | Multiple runs or larger grow rooms |
ICE Cannabis Seeds Specifications
Royal Queen Seeds bred ICE by crossing three of the most respected Indica genetics on the planet. Here is what you are working with.
| Specification | Detail |
|---|---|
| Seed Bank | Royal Queen Seeds |
| Genetics | Skunk x Northern Lights x Afghan |
| Type | Feminised (photoperiod) |
| Dominance | Indica-dominant hybrid |
| THC Content | Approaching 20% |
| Flowering Time | 8 weeks (10 weeks recommended) |
| Indoor Yield | ~400g per square metre |
| Plant Height | Compact, under 1 metre |
| Recommended Environment | Indoor / controlled environment |
| Available Packs | 1, 3, 5, or 10 seeds |
Complete your setup: if you are germinating ICE seeds indoors, pair them with a propagation kit and a quality grow tent. A carbon filter is non-optional once these resinous buds start flowering — the terpene output from Skunk and Afghan genetics is no joke. A basic pH meter will also save you headaches during the vegetative stage.
Why ICE Feminised Seeds Deserve a Spot in Your Grow Room
Three parent strains. Each one a hall-of-famer in its own right. Skunk brings vigour and that unmistakable pungent funk. Northern Lights adds resin production and a forgiving growth habit — the strain that taught a generation how to grow indoors. Pure Afghan rounds it out with stocky structure, heavy trichome coverage, and that deep, earthy backbone. Royal Queen Seeds took all three and stabilised them into ICE, and the result is exactly what you would expect from that genetic cocktail: a compact, frosty, no-nonsense Indica hybrid.
What makes ICE stand out from the dozens of Indica-dominant seeds we carry? Honestly, it is the resin. After 8 weeks of flowering, the buds are already glistening. But here is the thing we have seen growers confirm over and over: give ICE an extra 10 to 14 days beyond that 8-week mark and the trichome production goes from impressive to absurd. The buds get so sticky you will need to clean your scissors every few minutes during trim. That resin density also makes ICE an excellent candidate for hash production — if you are into dry sifting or pressing, this plant gives you serious raw material to work with.
The honest limitation? Yield. At roughly 400 grams per square metre, ICE is not going to compete with some of the heavier-yielding hybrids from Royal Queen Seeds — something like their Critical or Shining Silver Haze will outproduce it on raw weight. But what ICE lacks in sheer volume, it makes up for in potency and trichome density. You are trading grams for quality, and for most home growers, that is the right trade.
How ICE Grows: From Seed to Harvest
ICE feminised seeds produce compact plants that stay below 1 metre, making them a strong pick for tents where vertical space is limited. The Indica-dominant structure means short internodal spacing and thick, sturdy branches that hold up well under the weight of dense buds.
- Germinate your ICE seeds using the paper towel method or directly in a propagation plug. Taproots typically emerge within 24 to 72 hours at around 22-25 degrees Celsius.
- Transplant seedlings into their final pots once the first set of true leaves appears. A 7 to 11 litre pot works well for indoor grows given ICE's compact stature.
- Vegetate for 3 to 4 weeks under 18/6 lighting. ICE does not stretch much, so you can flip to flower earlier than you would with a Sativa-leaning strain.
- Switch to 12/12 lighting to trigger flowering. Expect the first pistils within 7 to 10 days.
- At week 6 of flower, trichomes will be visibly forming across the buds and sugar leaves. Resist the urge to harvest early.
- At week 8, the buds look ready — and technically, they are. But extend flowering to week 10 for maximum resin development. The extra 10 to 14 days push trichome production to its peak.
- Harvest when trichomes show a mix of milky and amber under magnification. Dry in a dark, ventilated space at 18-20 degrees Celsius and 55-60% humidity for 7 to 10 days, then cure in glass jars for at least 2 weeks.
ICE vs Other Indica Seeds From Royal Queen Seeds
Choosing between Indica-dominant seeds can feel like splitting hairs. Here is how ICE stacks up against two other popular picks from the same seed bank.
| Trait | ICE | Northern Lights | Critical |
|---|---|---|---|
| Genetics | Skunk x NL x Afghan | Pure Northern Lights | Afghani x Skunk |
| THC | ~20% | ~18% | ~18% |
| Flowering Time | 8-10 weeks | 7-8 weeks | 7-8 weeks |
| Indoor Yield | ~400g/m2 | ~500g/m2 | ~550g/m2 |
| Height | Under 1m | 1-1.2m | 0.8-1.4m |
| Resin Production | Exceptional | High | Moderate-High |
| Best For | Hash / resin quality | Beginners / stealth | Maximum yield |
If raw yield is your priority, Critical wins. If you want the easiest possible first grow, Northern Lights is more forgiving. But if trichome density and resin quality matter most — especially if you plan to make hash or concentrates — ICE is the better pick. We would grab ICE over the other two for any extraction project, no question.
Frequently Asked Questions
How long does ICE take to flower?
ICE flowers in approximately 8 weeks, but Royal Queen Seeds recommends extending to 10 weeks. That extra 10 to 14 days dramatically increases trichome and resin production. Harvest at 8 weeks if you are in a rush, but the 10-week buds are noticeably stickier and more potent.
Is ICE a good strain for making hash?
Yes — it is one of the best options from Royal Queen Seeds for hash production. The high THC-rich oil content and exceptional trichome coverage make ICE ideal for dry sifting, bubble hash, or pressing. The "Crystal Extreme" in the name is not marketing fluff; the resin output genuinely stands out.
What yield can I expect from ICE feminised seeds indoors?
Around 400 grams per square metre under standard indoor conditions with adequate lighting. SOG setups with 9 to 16 plants per square metre can help you hit that figure more consistently. It is not the heaviest yielder in the Royal Queen Seeds catalogue, but the bud quality compensates.
How tall does ICE grow indoors?
ICE stays compact at under 1 metre, making it a strong choice for tents with limited headroom. The Indica-dominant genetics produce short, bushy plants with tight internodal spacing. You will not need to worry about it outgrowing a standard 1.2m or 1.6m tent.
What is the THC content of ICE?
THC levels approach 20%, which places ICE in the upper range for Indica-dominant hybrids. Actual potency depends on your growing conditions, lighting, nutrients, and whether you let the plant flower for the full 10 weeks rather than cutting at 8.
Can I grow ICE as a beginner?
ICE is reasonably beginner-friendly thanks to its compact size and sturdy Indica structure. Northern Lights on its own is slightly more forgiving, but ICE does not demand advanced skills. Keep your environment stable, do not overwater, and give it the full 10-week flowering period for best results.
What does ICE smell and taste like?
Expect an earthy, sweet aroma with a sharp resinous edge — the Afghan and Northern Lights genetics come through strongly. The Skunk parentage adds a pungent layer that intensifies during weeks 5 to 8 of flowering. Use a carbon filter from week 3 of flower onwards.
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.