Hawaiian Snow

Hawaiian Snow Feminised Cannabis Seeds by Greenhouse Seeds

Hawaiian Snow is a sativa-dominant feminised cannabis seed variety from Greenhouse Seeds that delivers a staggering 23% THC and yields up to 700g/m² indoors. Built on Hawaiian Sativa and Laos genetics, this multi-award-winning strain has collected trophies from the High Times Cannabis Cup, Spannabis Barcelona, and the ICMAG Breeders Cup — seven awards and counting. If you want a proper sativa with genuine pedigree, this is the one sitting at the top of the shelf.

Hawaiian Snow Specifications and Genetics

Hawaiian Snow feminised seeds carry genetics rooted in Hawaiian Sativa crossed with Laos — two landrace-influenced lines that give this variety its towering growth, extended flowering window, and that unmistakable haze aroma. Here are the numbers that matter.

Why Hawaiian Snow Feminised Seeds Deserve a Spot in Your Grow Room

There's a reason this variety has picked up seven Cannabis Cup awards across multiple years and categories. Hawaiian Snow took 1st place as Best Sativa at the ICMAG Breeders Cup 2007, 1st place at the IC420 Growers Cup 2007, 1st place at the Champions Cup 2007, and 2nd place at the High Times Cannabis Cup 2011 — and that's not even the full list. She also grabbed 2nd and 3rd in the indoor category and 3rd in the outdoor category at the Private Cannabis Cup 2013. That kind of consistency across different judges, different years, and both indoor and outdoor categories tells you the genetics are rock solid.

At 23% THC, Hawaiian Snow sits comfortably in the upper tier of sativa varieties. The effect is what we'd call a creeping high — it doesn't smack you immediately. Instead, it builds over 15–20 minutes into a long-lasting, uplifting, and genuinely social headspace. The kind where you actually want to do things: talk, create, clean the kitchen at midnight. It's not a couch-lock strain by any stretch. If you're after a productive sativa that also smells like pure haze — thick, incense-like, fills the room the moment you open a jar — Hawaiian Snow is the one.

The honest limitation? Patience. Twelve weeks of flowering is a long time, especially when you're used to 8–9 week indicas. And this plant grows tall with long lateral branches, which means you need vertical space or a solid training plan. She's not the strain for a 60x60 tent with no height to spare. But if you've got the room and the discipline to let her finish properly, the payoff is genuinely generous — 600 to 700 grams per square metre indoors, or a staggering 1.2 kilograms per plant outdoors. That's not marketing fluff; those numbers come from Greenhouse Seeds' own testing, and we've seen experienced growers hit them.

How to Grow Hawaiian Snow Feminised Seeds

Hawaiian Snow rewards growers who plan ahead. She's a sativa through and through — tall, stretchy, and hungry for light. Here's how to get the best from her.

1. Germination: Soak seeds in a glass of room-temperature water for 12–24 hours, then transfer to damp paper towels in a warm, dark spot (22–25°C). Taproots typically appear within 48–72 hours. Plant taproot-down into a small pot of light seedling mix, about 1cm deep.
2. Vegetative phase: Hawaiian Snow grows tall and fast. Start LST (Low Stress Training) early — bend and tie down the main stem once she has 4–5 nodes. This encourages lateral growth and keeps the canopy even, which is critical for maximising light penetration across those long branches. If you're running a ScrOG, weave branches through the net during veg and flip to 12/12 once 60–70% of the screen is filled.
3. Flip to flower: Switch your light cycle to 12/12. Expect significant stretch in the first 2–3 weeks of flowering — sativas can double in height after the flip. Make sure you've got at least 1.5 metres of headroom above the net or training points.
4. Flowering (12 weeks): This is where patience pays off. Hawaiian Snow needs the full 12 weeks to develop properly. Don't rush the harvest. By week 8–9, buds will be packing on weight rapidly, and by week 10–11, branches may start drooping under their own mass. Install support stakes, yo-yos, or trellis netting to prevent snapped branches. The haze smell will be intense — a carbon filter is not optional if discretion matters.
5. Outdoor growing: Plant out after the last frost. Hawaiian Snow thrives in warm, Mediterranean-style climates with long summers. She'll be ready by the end of October. In northern Europe, you're pushing it — she needs those extra autumn weeks to finish, so a greenhouse or polytunnel helps if your climate is marginal. Outdoor plants can reach considerable height, so topping or supercropping during veg keeps things manageable.
6. Harvest and drying: Check trichomes with a loupe or digital microscope. For a more uplifting effect, harvest when trichomes are mostly cloudy with minimal amber. Dry in a dark room at 18–20°C and 55–60% humidity for 10–14 days, then cure in glass jars for at least 2 weeks. The haze terpene profile really opens up after a proper cure.