How to Grow Autoflower White Widow
White Widow Auto is the autoflowering version of the legendary White Widow, crossed with a ruderalis so it flowers on age. It is a sativa-leaning 55/45 hybrid with a high 20-25% THC, a citrus, earthy, piney and pungent flavor, and a happy, relaxed, talkative effect. Compact, frosty and famously resinous, it brings true White Widow character to a fast, easy auto grow.
As an autoflowering strain, White Widow Auto flowers automatically with age rather than waiting on a change in the light cycle, so there is no need to switch it to shorter days. You simply give it long days from start to finish and it starts flowering on its own after a few weeks, running its whole life cycle in about 8 to 10 weeks from seed to harvest. That speed and simplicity are exactly what make autos so easy to grow.
Recommended Strains
White Widow Autoflower HMC Edition
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THC | 20% - 25% (High) |
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Type | Autoflowering |
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Yield | Medium |
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Phenotype | 45% Indica / 55% Sativa |
White Widow Autoflower
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THC | 20% - 25% (High) |
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Type | Autoflowering |
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Yield | Medium |
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Phenotype | 45% Indica / 55% Sativa |
Frosty, potent and quick, White Widow Auto is a rewarding auto to grow whether you are new to it or experienced. You can see the full genetics and buy White Widow Auto seeds on the strain page, and browse the rest of our autoflowering seeds alongside it.
Strain Profile at a Glance
| THC | High (20-25%) |
|---|---|
| Lineage | White Widow x Ruderalis |
| Type | Autoflowering |
| Genetics | 55% Sativa / 45% Indica |
| Climate | Temperate |
| Life cycle | 8-10 weeks seed to harvest |
| Harvest (outdoor) | All season |
| Height | 3.61 ft / 1.1 m |
| Yield indoor | 1.15-1.47 oz/ft² (350-450 g/m²) |
| Yield outdoor | 21.16 oz/plant (600 g/plant) |
| Grow difficulty | Easy, beginner-friendly |
| Flavors | Citrus, Earthy, Pine, Pungent |
| Effects | Happy, Relaxed, Talkative |
Promos & Deals
Growing an Autoflowering Strain
White Widow Auto flowers on its own schedule, starting to bloom a few weeks after it sprouts no matter how long the days are. That means you keep it under long light the whole way through, typically 18 hours on and 6 off, or even 20/4, from seedling right to harvest; there is no switch to a shorter day to trigger flowering. The trade-off is that you cannot delay flowering to grow the plant bigger first, so every week of healthy early growth counts.
Because autos grow fast and do not like having their roots disturbed, start White Widow Auto in its final pot rather than transplanting it. Sow the seed straight into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. With a short life cycle of around 8 to 10 weeks from seed to harvest, a smooth start is the single biggest thing you can do for a strong, even finish.
Climate and Where to Grow It
White Widow Auto suits a temperate climate and, like most autos, it is flexible about when you plant it. Because it flowers on age rather than on the season, you can run it at almost any time where the weather is warm enough, which is why its harvest window is listed as all season; outdoors you can even fit in more than one cycle in a long, warm year. At a compact 1.1 m it slips easily into a small tent or a sunny corner.
Yields show a nice split: around 350-450 g/m² indoors, but a big 600 g per plant outdoors when it has space, sun and a large pot, so it really rewards an outdoor spot. As a bright, vigorous sativa-leaning plant with classic skunk roots, it is easy to grow, and its 20-25% THC makes it a standout among our high-THC seeds.
Keep humidity sensible through flowering to protect those famously resinous buds: around 55-60% early on, nearer 40% as the flowers fill out, and lower toward harvest. White Widow’s trademark white, trichome-caked colas can trap moisture, so steady airflow through the canopy keeps the finish clean. Aim for temperatures around 68-80°F (20-27°C) for healthy, vigorous growth.
Feeding Schedule (EC Guide)
White Widow Auto is a resinous, vigorous auto, but autos want a lighter hand than photoperiod plants, so keep the feed modest and build slowly. Start very light, raise it gently as the plant grows, push a little more phosphorus and potassium through flower, then flush at the end so the citrus, earthy and piney notes come through clean. The ranges below are a starting guide; adjust to your water and medium.
| Stage | EC (mS/cm) | Notes |
|---|---|---|
| Seedling | 0.4-0.6 | Very light feed while roots establish in the final pot |
| Early growth | 0.8-1.2 | Raise nitrogen gently as the plant builds size |
| Early flower | 1.2-1.4 | Shift toward bloom nutrients (P and K) |
| Full flower | 1.4-1.6 | Peak bloom feed while the buds swell |
| Flush | 0.0-0.4 | Plain water for the final 1-2 weeks |
Flowering and Harvest
White Widow Auto starts flowering a few weeks from sprouting and runs its whole cycle in about 8 to 10 weeks from seed to harvest, with no change in the light cycle needed. It fills out with dense, resin-coated, trichome-caked buds that give White Widow its famous frosty, white look, developing a citrus-tinged, earthy, piney aroma with a pungent edge. Because it flowers on age, its harvest comes on a fixed, quick timeline.
Yields are moderate indoors at around 350-450 g/m², while a single plant given room and sun outdoors can reach a big 600 g. Keep the colas supported and the canopy open so the lower buds get light, feed it lightly through flower, and harvest when most of the trichomes have turned cloudy with a few amber for the fullest flavor and the most rounded effect.
Drying and Curing
Dry whole plants or branches in a dark room at around 60°F (15-18°C) and 55-60% humidity for 7-14 days, until the thin stems snap rather than bend. A slow, even dry matters with such dense, resinous buds, because they can stay damp in the middle while the outside dries, and a gentle dry protects the citrus, earthy and piney aroma.
Then cure the trimmed buds in sealed jars, burping them daily for the first week and letting them settle for three to four weeks. A proper cure is what brings out the citrus, earthy, piney and pungent notes and smooths the smoke, turning a freshly dried auto harvest into the rich, classic result White Widow is famous for.
What to Do With Your Trim
Don’t bin the sugar leaves you remove while manicuring. White Widow Auto is famously one of the frostiest, most resinous plants around, so its trim is excellent for dry sift, bubble hash or rosin. That heavy resin and citrus-earthy aroma make the trim genuinely valuable, turning offcuts into a potent, flavorful concentrate run rather than waste.
Flavor and Terpenes
White Widow Auto leads with a citrus-tinged, earthy, piney flavor and a pungent edge, the classic profile that made White Widow a global favorite. It is a smooth but pungent smoke, and a good cure really brings that earthy-pine-and-citrus character forward in the jar and on the inhale.
Its terpene profile shapes that flavor. Caryophyllene drives the warm, peppery, pungent spice, while humulene brings a woody, earthy depth and alpha-pinene gives the fresh, piney edge. A touch of guaiol adds a soft, woody-piney note, with a little isopulegol for a cool lift and neryl acetate a sweet, floral touch. The citrus flavor sits on top of this grounded, piney terpene base.
Effects and Best Use
With its high 20-25% THC and balanced, lightly sativa-leaning 55/45 make-up, White Widow Auto delivers a bright, well-rounded experience. It is reported as happy, relaxed and talkative, pairing an upbeat, sociable head with a comfortable, settled body, which makes it a versatile strain for daytime or social use. Its potency runs high, so a little goes a long way, especially for newer smokers.
That happy, relaxed, talkative profile makes it a satisfying all-rounder, good for staying cheerful and sociable while enjoying its earthy, piney, citrus-tinged flavor. The combination of a fast, compact auto grow, a big outdoor yield, heavy resin and a classic effect is exactly why this White Widow autoflower stays a favorite.
Common Problems and Pro Tips
White Widow Auto is forgiving, but autos reward a careful start. Sow it straight into its final pot to avoid a transplant check, go light on the nutrients while it is young, and do any training early and gently, because once an auto starts flowering it will not recover lost time. Stick to low-stress training only, and only while the plant is still growing.
At a compact 1.1 m it is easy to manage, so the main jobs are a smooth start and good light. Because White Widow is so frosty and its colas are so resin-packed, keep the air moving around the buds, hold humidity sensible through flower, and defoliate a few of the largest fan leaves so light reaches the lower buds for an even finish.
As a pro tip, make the most of its famous resin: keep the feed modest, give it a sunny outdoor spot and a large pot to hit that big 600 g outdoor yield, and protect the terpenes with a proper plain-water flush and a full three to four week cure. Save the frosty trim for concentrates, and harvest when most trichomes are cloudy with a few amber for a classic, potent White Widow result.
FAQ
Is White Widow Auto an autoflowering strain?
Yes. White Widow Auto flowers automatically with age rather than on a change in the light cycle, so you keep it under long days, usually 18/6 or 20/4, from seedling to harvest. It starts flowering on its own a few weeks after sprouting and runs its whole life cycle in about 8 to 10 weeks from seed to harvest, which makes it fast and simple to grow.
Should I transplant White Widow Auto?
No. Autos grow fast and do not like having their roots disturbed, so start White Widow Auto straight in its final pot rather than transplanting it. Sow the seed into the container it will finish in, go easy on the feed while it is young, and let it establish without a check. A smooth, uninterrupted start is the single biggest thing you can do for a strong finish.
How much does White Widow Auto yield?
Indoors it is a moderate yielder at around 350-450 g/m², but outdoors it really shines, with a single plant reaching a big 600 g given space, sun and a large pot. Give it good light, a big enough final pot and an open canopy to get the most from its frosty, resin-packed buds on its quick cycle.
How much THC does White Widow Auto have?
White Widow Auto is a high-THC auto, testing from around 20% up to 25% depending on the phenotype and how it is grown, which is strong for an autoflower. Combined with its balanced, lightly sativa-leaning genetics, the result is a happy, relaxed, talkative effect. Because the potency is high, it is worth dosing carefully if you are newer to strong strains.
What does White Widow Auto taste like?
It has a citrus-tinged, earthy, piney flavor with a pungent edge, the classic White Widow profile. Caryophyllene drives the peppery pungency, humulene a woody depth, alpha-pinene a fresh piney edge, and a touch of neryl acetate a sweet, floral note. A proper three to four week cure really brings that earthy-pine-and-citrus character forward.
How long does White Widow Auto take?
White Widow Auto runs its whole life cycle in about 8 to 10 weeks from seed to harvest, because it flowers on age rather than on the season. That short, fixed timeline means you can plant it almost any time where it is warm enough, and outdoors you can fit more than one cycle into a long, warm year. There is no light-cycle change to manage.
