Hybrid · Green House Seed Co.
White Widow
White Widow is a balanced hybrid bred from a Brazilian sativa landrace and a South Indian indica with heavy resin production. The cut took the High Times Cannabis Cup in 1995 and has been a Dutch coffeeshop standard ever since. Plants throw bright trichome coverage that gives finished bud a white-frost appearance under flash photography. Indoor cycles run eight to nine weeks, and the strain is forgiving enough for new growers to land a usable harvest on a first attempt.
Reviewed 2026-05-23· Sources: seedfinder.eu, Green House catalogue, High Times archive
Potency
- THC range
- 18–25%
- Typical THC
- 22%
- CBD
- up to 0.2%
Flowering
- Indoor weeks
- 8–9 wk
- Difficulty
- Easy
- Climate
- Mediterranean, indoor
Yield & size
- Indoor
- 500-600 g/m²
- Outdoor
- 500-700 g/plant
- Height
- 100-130 cm
Indica / sativa ratio
Terpene profile
The aromatic compounds below shape how White Widow smells, tastes, and ultimately feels in the body.
- dominant
Myrcene
Sedating, musky, herbal — commonly linked to couch-lock effects.
- 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
Humulene
Hoppy and earthy — appetite-suppressing and shared with hops and sage.
Reported side effects
Lineage
White Widow traces to Brazilian Sativa × South Indian Indica. The cross sits in the Widow line family, which influences both the terpene profile and the flowering structure described above.
Genetic family tree
Documented parents for White Widow 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 White Widow
White Widow is a parent of 4 strains in the broader catalogue. These are crosses that carry White Widow genetics on at least one side of the cross.
Grow profile
Grow profile
- Indica / sativa
- 50% / 50%
- Flowering days
- 56–63 days
- Stretch
- Moderate
- Pest resistance
- High
- Mold resistance
- High
- Training methods
- topping, lst, scrog
Feed schedule for White Widow
These EC and NPK targets are starting points calibrated for the strain's Hybrid lean and easy 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
- 1.0-1.2 EC
- Early flower
- 1.1-1.3 EC, NPK 2-2-4
- Mid flower
- 1.4-1.6 EC, NPK 1-3-5
- Late flower
- 1.2-1.4 EC
- Final week
- Plain pH-balanced water for the last 5-7 days.
Full breakdown of feed math, runoff testing, and salt buildup in our nutrient guide.
What to expect through the grow cycle
White Widow is documented with a 9-week flower split across the standard hybrid phases. The visual below maps a documented 13-week cycle built from 4weeks of vegetative growth and the strain's published flowering window.
Published grow reports for White Widow concentrate the most observational notes on the mid-to-late flower transition. 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 White Widow. Plants establish root structure, leaf canopy, and node count before flower triggering, with a easy difficulty rating shaping how forgiving the early canopy work tends to be.
- Stretch (weeks 5-7)
- White Widow is documented as having moderate stretch. Reports describe the plant roughly doubling in height during this phase as the hybrid structure establishes its final flowering frame.
- Bud sites (weeks 8-9)
- Pre-flowers form at the nodes and calyxes begin to develop. Grow reports for White Widownote this as the window where the canopy's eventual bud distribution becomes visible.
- Bud development (weeks 10-11)
- Flowers thicken and calyxes fatten through this phase. Documented White Widow runs show the bulk of visible flower mass accumulating here, with resin production accelerating toward the end.
- Ripening (week 12)
- Trichomes transition from clear toward cloudy and amber. Reports for White Widow describe the Myrcene-led terpene profile maturing through this window, with aroma sharpening week over week.
- Final (week 13)
- Calyx swelling is documented as complete and the harvest window opens. Published White Widow runs end here, within the 8-9 week flowering range reported by the breeder.
Flavor & aroma
Reported effects
Awards
- 1995 · High Times Cannabis Cup — 1st
Common questions about White Widow
Did Green House Seeds actually breed White Widow?
Green House released the widely sold commercial cut and won the 1995 Cup with it. The original parents trace to breeder Shantibaba's work at Green House before he left to start Mr. Nice Seedbank.
How much THC does White Widow produce?
Modern White Widow phenotypes test between 18 and 25 percent THC. Older cuts tested closer to 18 percent.
Breeder of record
Green House Seed Co.
View breeder profile and other strains →
More from Green House Seed Co.
Strains similar to White Widow
These picks lean on the same terpene profile and parent genetics as White Widow — 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.