Sativa · Green House Seed Co.
Hawaiian Snow
Hawaiian Snow is the Green House Seed Co. cross of Pure Haze, Neville's Haze, and Hawaiian Sativa released in the mid-2000s, an almost-pure sativa designed for growers willing to commit to long flowering windows in exchange for top-tier cerebral effects. The strain took first place at the High Times Cannabis Cup in 2003 in the sativa category and again at the IC420 Growers Cup in 2007. Plants stretch heavily, finish in twelve to thirteen weeks indoors, and produce sparse, frosty buds with a sharp pine-citrus and incense terpene profile. The high is one of the most psychedelic cerebral expressions in the Green House catalogue — fast onset, long duration, and clear-headed throughout.
Reviewed 2026-05-23· Sources: seedfinder.eu, Green House catalogue, Cannabis Cup archive
Potency
- THC range
- 20–26%
- Typical THC
- 23%
- CBD
- up to 0.1%
Flowering
- Indoor weeks
- 12–13 wk
- Difficulty
- Hard
- Climate
- Mediterranean, tropical, warm dry
Yield & size
- Indoor
- 400-500 g/m²
- Outdoor
- 700-900 g/plant
- Height
- 180-220 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how Hawaiian Snow smells, tastes, and ultimately feels in the body.
- dominant
Terpinolene
Piney and fruity — fresh, slightly floral, common in sativa-leaning cultivars.
- secondary
Pinene
Alert and pine-forward — associated with mental clarity and bronchodilation.
- secondary
Caryophyllene
Peppery and spicy — the only terpene that binds CB2 receptors, studied for anti-inflammatory action.
- minor
Ocimene
Sweet and herbal — light, tropical, with a decongestant character.
Reported side effects
Lineage
Hawaiian Snow traces to Pure Haze × Neville's Haze × Hawaiian Sativa. The cross sits in the Haze family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents for Hawaiian Snow based on breeder catalogues. Library entries are clickable; ancestors not yet documented on this site appear in a lighter, non-linked box.
Strains crossed with Hawaiian Snow
Hawaiian Snow is a parent of 2 strains in the broader catalogue. These are crosses that carry Hawaiian Snow genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 5% / 95%
- Flowering days
- 84–91 days
- Stretch
- High
- Pest resistance
- High
- Mold resistance
- Moderate
- Training methods
- topping, scrog, supercropping
Feed schedule for Hawaiian Snow
These EC and NPK targets are starting points calibrated for the strain's Sativa lean and hard difficulty rating — not gospel. Drop 15-20% off any EC ceiling on your first run and let the plant tell you where it actually wants to feed.
Suggested feed schedule
- Late veg
- 1.5-1.7 EC
- Early flower
- 1.6-1.8 EC, NPK 2-2-3
- Mid flower
- 1.9-2.1 EC, NPK 1-3-4
- Late flower
- 1.7-1.9 EC
- Final week
- Aggressive water flush at 6.2-6.5 pH for the last 7-10 days to clear salts.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
Hawaiian Snow is documented with a 13-week flower and a longer stretch phase typical of sativa-leaning hybrids. The visual below maps a documented 17-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for Hawaiian Snow concentrate the most observational notes on the stretch window. This timeline is descriptive — it reflects what reports document, not a how-to. Actual week-to-week behaviour varies with phenotype, light intensity, pot size, and environment.
Phase details
- Veg (weeks 1-4)
- The documented vegetative period for Hawaiian Snow. Plants establish root structure, leaf canopy, and node count before flower triggering, with a hard difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-9)
- Hawaiian Snow is documented as having high stretch. Reports describe the plant roughly doubling in height during this phase as the sativa-leaning structure establishes its final flowering frame.
- Bud sites (weeks 10-12)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for Hawaiian Snownote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 13-15)
- Flowers thicken and calyxes fatten through this phase. Documented Hawaiian Snow runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 16)
- Trichomes transition from clear toward cloudy and amber. Reports for Hawaiian Snow describe the Terpinolene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 17)
- Calyx swelling is documented as complete and the harvest window opens. Published Hawaiian Snow runs end here, within the 12-13 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Awards
- 2003 · High Times Cannabis Cup — 1st (Sativa)
- 2007 · IC420 Growers Cup — 1st
Common questions about Hawaiian Snow
Why does Hawaiian Snow take so long to flower?
The Pure Haze and Neville's Haze parents both carry equatorial sativa genetics with twelve-plus-week native flowering windows. The Hawaiian Sativa side does not shorten the window meaningfully — expect a full three-month flower.
Is Hawaiian Snow good for beginners?
No. The long flower, heavy stretch, and large finished plant size make it one of the more demanding strains in the Green House catalogue. Most growers should run shorter Haze hybrids before attempting Hawaiian Snow.
Breeder of record
Green House Seed Co.
View breeder profile and other strains →
More from Green House Seed Co.
Strains similar to Hawaiian Snow
These picks lean on the same terpene profile and parent genetics as Hawaiian Snow — shared dominant terps, overlapping lineage, and matching indica/sativa lean. No star ratings or popularity contests, just overlap on the traits that actually drive a similar grow and smoke.
