White Widow Strain Autoflower SeedsThe frosty Dutch classic crossed with ruderalis for speed
No reviews yet · be the first to review White WidowThe White Widow strain in autoflower form is the 1990s Dutch favorite crossed with ruderalis, so plants bloom on their own and can be cut roughly 9 to 12 weeks after sprouting. Expect a short, bushy plant around 40–110 cm, the same resin-white buds and spicy, woody smell, and a little less THC than the photoperiod original. Every seed is feminized.
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What is the White Widow strain?
White Widow is a Dutch hybrid from Green House Seeds, famous for buds so coated in trichomes they look white, and this autoflowering version crosses it with ruderalis. Green House lists its White Widow Auto at 40% sativa, 40% indica and 20% ruderalis, with a lab result of 15.95% THC and 0.56% CBD. Plants stay short, flower without any change in light, and finish roughly 9 to 12 weeks from seed depending on the line.
Green House and Royal Queen Seeds list 40% sativa, 40% indica and 20% ruderalis; the ruderalis share is counted with indica here.
The auto keeps White Widow's white resin coat while staying under about 1 m in most grows.
White Widow strain specs
These numbers are for the autoflower, not the photoperiod White Widow. They come from Green House Seeds' White Widow Auto page and Royal Queen Seeds' White Widow Auto, checked against SeedFinder. The two breeders' figures differ, so the ranges cover both.
| Type | Autoflowering hybrid: 40% sativa, 40% indica, 20% ruderalis |
|---|---|
| Genetics | White Widow × ruderalis |
| Bred by | Original White Widow by Green House Seeds (Netherlands); auto versions by Green House, Royal Queen Seeds and others |
| THC | About 14–16% (Green House lab result 15.95%; RQS up to 14%) |
| CBD | Low to moderate (Green House: 0.56%) |
| Main terpenes | Myrcene, α-pinene, β-caryophyllene (Green House) |
| Aroma & flavor | Spicy, woody, earthy and sweet; pepper and pine on some plants |
| Reported effects | Body calm first, then an upbeat head high |
| Seed type | Autoflowering feminized (female plants) |
|---|---|
| Seed to harvest | About 9–12 weeks (Green House 8–9 weeks; RQS 75–85 days) |
| Outdoor harvest | Any time in the warm season; Green House says it can be grown whenever it stays above 10 °C (50 °F) |
| Height | Short: 40–80 cm (16–31 in) indoors, 50–110 cm (20–43 in) outdoors |
| Yield | 400–600 g/m² indoors; about 60–240 g (2–8.5 oz) per plant outdoors, depending on the line |
| Difficulty | Easy |
| Best methods | Sea of Green, light LST, small SCROG |
| Climate | Indoors, or outdoors in short or cool summers; several runs a year in warm areas |
Where does the White Widow strain come from?
White Widow Auto comes from crossing the original White Widow with Cannabis ruderalis, the wild type that blooms by age instead of day length. White Widow itself was released by Green House Seeds in the Netherlands in the mid-1990s from a Brazilian sativa and a South Indian indica, and it won the Cannabis Cup in 1995. Royal Queen Seeds says its auto starts from a White Widow clone crossed with ruderalis.
Several companies make their own White Widow autoflower, including Green House Seeds and Royal Queen Seeds, and their lines are not identical: Green House lists a 7 week bloom and a 15.95% THC test, while RQS lists 50 to 55 days of bloom and up to 14% THC. Any White Widow autoflower is a few generations removed from the photoperiod plant, so it trades a little potency and size for speed.
How is White Widow Auto different from feminized White Widow?
White Widow Auto is smaller, faster and somewhat milder than photoperiod feminized White Widow. The photoperiod plant needs its light cut to 12 hours a day to bloom and flowers for about 8 to 9 weeks after a veg period, often reaching 75–100 cm indoors. The auto needs no light change, starts blooming after about three to four weeks, and is usually ready 9 to 12 weeks after sprouting at 40–80 cm indoors.
Potency trade-off. Breeder figures put the autoflower around 14–16% THC, below the roughly 18–25% reported for photoperiod White Widow.
What does White Widow taste like, and how does it feel?
Aroma and flavor
White Widow Auto tastes spicy, woody and earthy with a sweet undertone, and Green House notes some plants carry a faint metallic note. Royal Queen Seeds describes its version as earthy, peppery and piney with a pungent, woody smell.
- Spice
- Wood
- Earth
- Sweet
- Pepper
- Pine
Terpenes
- Myrcene
- Earthy, musky base
- α-Pinene
- Fresh pine and a sharp, clean edge
- β-Caryophyllene
- Peppery, spicy warmth
Green House names myrcene, α-pinene and β-caryophyllene as the most expressed terpenes in its White Widow Auto; it gives no percentages.
Reported effects
White Widow Auto is usually described as relaxing in the body at first, then lifting into a brighter, more energetic head high. Green House calls the onset fast and the effect long-lasting, while Royal Queen Seeds describes its auto as more physically relaxing and stoned.
- Relaxed
- Happy
- Uplifted
- Energetic
- Euphoric
White Widow Auto's common downsides are dry mouth and dry eyes, and new users can find the head rush stronger than expected.
These White Widow Auto effects summarize how Green House Seeds and Royal Queen Seeds describe their autoflower lines. Everyone reacts in their own way, and nothing here is medical advice.
How do you grow White Widow seeds?
White Widow autoflower seeds are an easy, quick grow: sow into a final 7–15 litre pot, run a long daily light period such as 18/6 or 20/4 the whole time, train lightly in the first three weeks, and harvest about 9 to 12 weeks from seed.
- Germinate2–5 days
White Widow Auto has a short life, so sprout it where it will finish rather than moving it from a cup.
- Early growthWeeks 1–3
This is White Widow Auto's whole veg window; bend the top gently sideways around day 14 to 18 if you want a flatter canopy.
- FlowerAbout 7–8 weeks
Pistils appear on their own around week three or four. Resin builds fast, and the buds frost over in the final weeks.
- Harvest9–12 weeks from seed
Green House's line can be ready by week 9; slower plants may need until week 12. Check that most trichome heads have gone milky.
Grow tips for White Widow
- Pack small spaces. White Widow Auto stays around 40–80 cm indoors with short side branches, so several plants fit in a Sea of Green setup.
- Don't top late. With only about three weeks before bloom, topping White Widow Auto can stall it; light LST is safer.
- Grow it more than once a year. Green House notes its auto can be planted outdoors any time it stays above 10 °C, so warm areas can fit two or three runs in a season.
- Go easy on nutrients. White Widow Auto is a small plant; start feeding at about half strength and raise it only if lower leaves pale early.
- Keep the frost clean. Its resin-heavy buds collect dust and moisture, so keep humidity around 40–50% late and avoid spraying in flower.
Is White Widow the right strain for you?
Great pick if you
- Want a quick harvest with no light schedule changes
- Grow in a small tent, closet or balcony
- Like spicy, woody, earthy classic flavors
- Want a balanced high that is a bit milder than photoperiod White Widow
Think twice if you
- Want the highest THC White Widow line (choose the photoperiod)
- Want big plants that you can veg for months
- Plan to take clones (autoflowers don't clone usefully)
- Prefer sweet, fruity dessert flavors
White Widow strain FAQ
What is White Widow Auto?
White Widow Auto is the classic White Widow crossed with ruderalis, so it flowers on its own instead of waiting for shorter days. Green House Seeds and Royal Queen Seeds both list theirs as 40% sativa, 40% indica and 20% ruderalis.
How long does White Widow Auto take from seed to harvest?
Most White Widow Auto plants finish about 9 to 12 weeks after sprouting. Green House Seeds gives 8 to 9 weeks total for its line, and Royal Queen Seeds gives 75 to 85 days. Use trichome color to decide the exact day.
How much THC does White Widow Auto have?
Green House Seeds reports a 15.95% THC test for its White Widow Auto, with 0.56% CBD. Royal Queen Seeds lists its version at up to 14% THC. That is lower than the roughly 18–25% reported for photoperiod White Widow.
How tall does White Widow Auto grow?
White Widow Auto stays short. Royal Queen Seeds lists 40–80 cm (16–31 in) indoors and 50–110 cm (20–43 in) outdoors, and Green House gives about 70–80 cm for its outdoor plants.
How much does White Widow Auto yield?
Breeder figures run 400–600 g/m² indoors. Outdoors, Green House lists about 60–80 g per plant, while Royal Queen Seeds lists 190–240 g per plant. Pot size, light and how long the plant grows before flowering make a large difference.
Do I need to change the light schedule for White Widow Auto?
No. White Widow Auto starts to bloom by age, usually three to four weeks after sprouting, whatever the light schedule. Many growers run 18/6 or 20/4 from start to finish.
Is White Widow Auto indica or sativa?
White Widow Auto is a balanced hybrid with ruderalis added, listed at 40% sativa, 40% indica and 20% ruderalis. Its effect is described as calm in the body first, then upbeat in the head.
Why is it called White Widow?
White Widow gets its name from the thick layer of white trichomes that coats its buds and nearby leaves late in flower. The autoflower version keeps that frosty look on a smaller plant.
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White Widow's relatives and similar strains
White Widow Feminized
White Widow Regular
Black Widow Autoflowering Feminized
Blue Widow FeminizedBeaver Seeds sells cannabis seeds for collection and genetic preservation where permitted. Check the laws in your state, province or country before germinating seeds. Effects are user-reported and are not medical claims.
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