Autoflower seeds will automatically flower with age, regardless of the light cycle. Thanks to exciting new autoflower genetics and unique hybrid autoflower strains, it is now possible to grow multiple harvests in a single growing season with their fast life cycle. From seed to harvest, auto flower strains typically take about 8 to 10 weeks to mature with ample light, while some sativa hybrids can take up to 12 weeks. With these expedited harvest times, it’s no surprise that feminized autoflowering seeds have gained such popularity among cannabis growing enthusiasts.
AUTOFLOWER SEEDS
Autoflower Seeds
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Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds
Autoflower Seeds for Sale
Fast 8 week harvests, high THC genetics, beginner friendly
Our Autoflower Seeds collection features elite modern cannabis genetics that finish fast, stay compact, and hit hard. Autoflower seeds begin flowering on their own without any change in light cycle. Most go from seed to harvest in about 8 to 10 weeks. That speed is why autoflower strains are trusted by first time home growers and by experienced growers who want multiple outdoor harvests per season in the United States.
Every pack in our autoflower seed bank comes from verified breeders and tested lines. We focus on feminized autoflower seeds with strong structure, resin production, and potency so you get reliable female plants instead of wasting time on males. All autoflower seeds are shipped discreetly within the USA with germination support and clear grow guidance from our in house cultivation team.
What are autoflower seeds
Autoflower cannabis seeds are bred using Cannabis ruderalis genetics. Unlike traditional photoperiod strains that only start blooming after a change to a 12 hour light cycle, true autoflowering seeds flip into flower based on age, not lighting. Most autos begin flower around week four and finish in under 70 days from sprout. That makes autoflowering seeds one of the fastest ways to produce quality bud at home with minimal equipment.
Feminized autoflower seeds are both feminized and automatic. That means they produce primarily female plants and go into flower on their own. Regular autoflower seeds are still automatic but can produce both males and females. Newer growers usually choose feminized autoflower seeds because every plant has the potential to produce smokable flower instead of pollen.
Modern autoflower strains are no longer the weak, low THC plants growers remember from early ruderalis crosses. Breeders now work Sativa and Indica genetics into the line, hunt stable phenotypes, and backcross for terpene expression, bag appeal, and consistency. The result is compact plants with dense buds, visible trichome coverage, and THC levels that rival full season photoperiod strains.
Why autoflower seeds are popular with indoor and outdoor growers
Fast turnaround and repeat harvests
Autoflower seeds let you pull a full grow cycle in roughly 8 to 10 weeks instead of the 12 to 16 weeks common with many photoperiod strains. Outdoor growers in cooler regions can fit more than one run into a single summer. Indoor growers can schedule perpetual harvests year round without complicated light schedules.
Beginner friendly and low maintenance
Autoflower plants are more forgiving than most traditional photoperiod genetics. You do not have to flip lights to 12 and 12. You do not have to manage strict veg timing. You can keep a simple 18 hour light cycle from start to finish and still get buds. For first time growers, that means fewer timing mistakes and less stress about light leaks.
Compact, stealth friendly structure
Most autoflower strains stay short, often in the 12 to 24 inch range. The small footprint works well for balcony grows, closets, tents with limited vertical space, and discreet backyard locations. The naturally low profile also reduces visibility outdoors which matters for privacy.
Resilient genetics
Because autoflowering genetics come from Cannabis ruderalis, which evolved in harsh northern climates, many autos handle stress better than traditional strains. Sudden temperature swings, inconsistent summer weather, or minor feeding mistakes are less likely to destroy the run. This hardiness is one reason experienced growers keep autos in rotation for backup yield.
How to grow autoflower seeds
Autos do not like transplant shock. When the taproot hits the bottom of the pot the plant reads that as a signal to start transitioning into flower. For that reason we recommend germinating and finishing in the same breathable container whenever possible.
Most growers use a 2–3 gallon fabric pot or air pot. Fabric-style pots keep roots oxygenated, prevent circling, and reduce stress. The less stress an autoflower experiences in the first 2–3 weeks, the bigger and healthier it will finish.
Autoflowering seeds prefer light, fluffy, well-aerated soil with good drainage. Heavy or compacted soil will slow root development and stall the whole plant.
During early veg, run a mild nutrient program — around 25% to 50% of what you would feed an aggressive photoperiod plant. Too much nitrogen early can stunt autos and cap yield. Once flowers set, ease off nitrogen and increase phosphorus and potassium to support bud production and terpene development.
Unlike photoperiod plants, autoflower strains do not require a 12 hour dark cycle to bloom. They flower based on age, not light schedule.
Most growers run 18 hours on / 6 hours off from seed to harvest. Some experienced indoor growers push 20/4 for even more light. Outdoors, autos will still flower naturally even during long summer days, which is why they’re popular in northern states and short-season climates.
The bottom line: you don’t have to “flip” autos. Keep a steady light cycle and let the genetics do the work.
Overwatering is one of the top reasons new growers ruin an autoflower run. Constantly wet roots slow growth, starve oxygen, and can trigger droop and stall.
Let the top layer of soil dry between feedings. Lift the pot and learn the weight of a properly watered plant. Drooping, slightly tired leaves usually mean the plant is thirsty. Puffy, swollen-looking leaves usually mean you’ve already given too much water.
Dialing in watering discipline does more for yield than most “advanced tricks.”
High stress training, topping, and hard pruning can slow an autoflower at the exact moment it should be building flowers. Autos don’t have time to recover from major stress because their clock never stops.
If you train, stick to light low stress training (LST) early in veg. The goal is to open the canopy so light hits more bud sites — not to aggressively reshape the plant. Stop bending and tying down once you see clear pre-flowers starting to stack.
Less stress early = thicker buds later.
What to expect at harvest
Most feminized autoflower seeds are ready to chop around week 9 or week 10. You are looking for milky trichomes with some amber starting to show and pistils that have darkened. You do not have to harvest the entire plant at once. It is normal for the main cola to finish first while lower side branches keep swelling. Take what is ready, then let the rest catch up.
Yield will depend on genetics, pot size, light quality, and feeding discipline. Many healthy autoflower plants will produce multiple dense, resinous colas with visible frost and full aroma even in a small tent. Good autos today compete with many classic photoperiod strains on taste and effect, which was not the case ten years ago.
Why buy autoflower seeds from Seedbank
Seedbank focuses on premium feminized autoflower seeds sourced from proven breeders with stable lines. Every batch is handled by growers who understand germination, soil prep, lighting strategy, and post harvest cure. We give realistic timelines, not fantasy marketing. We ship discreetly across the USA. We support first time growers who want a successful first run and we support experienced cultivators who are stacking perpetual harvests for personal supply.
We built our autoflower seed bank around three promises. First, genetics that finish fast and stay compact. Second, reliable female plants with strong trichome production and true strain character. Third, responsive support if you need help getting from sprout to cure. That combination is why customers trust us when they search for the best autoflower seed bank and why they come back for their next run of feminized autoflower seeds.
Your Top Questions About Autoflower Seeds Answered
Most feminized autoflower seeds are bred to finish fast. Under the right conditions, many autoflower strains can go from sprout to harvest in about 8 to 10 weeks. Some slower, sativa-leaning autos may take closer to 11–12 weeks, but that is still noticeably faster than traditional photoperiod strains, which often need a veg phase plus 8–10 full weeks of flower.
The reason autoflowers are so quick is that they don’t wait for a light schedule change. They start flowering based on age, not on a 12/12 cycle. That “timer-based” growth pattern is what lets first-time home growers get usable bud in a single season, even in shorter outdoor climates.
If you’re looking for fast turnaround, look for compact, early-finishing strains in our Autoflower Seeds collection. Those genetics are specifically selected for speed, stability, and reliable structure.
Yes. Older autoflowers used to have a reputation for being weak because early Ruderalis genetics were bred mainly for survival, not THC. Modern autoflower genetics are very different. Breeders now stabilize crosses that include proven indica and sativa parents, then lock in the “automatic flowering” trait without sacrificing resin production, terpene profile, or overall strength.
The result is a compact plant with dense buds, visible frost, and heavy aroma. Many growers now keep autos and photoperiod strains in the same tent because the quality is comparable — the autoflower just finishes first.
In practical terms: today’s premium feminized autoflower seeds are absolutely capable of delivering high-THC, top-shelf flower with real flavor and bag appeal.
The most common beginner mistake is stressing the plant in the first few weeks. Autoflowers have a built-in life cycle and they don’t recover well from early setbacks. Heavy overwatering, late transplants, hard topping, or breaking branches with aggressive training can all stunt an auto permanently. Once an autoflower decides to enter bloom, you cannot “re-veg” it to fix that lost size.
Three pro tips for new growers:
1. Start in (or very quickly move to) the final container. Autoflowers dislike transplant shock, so most people germinate directly in a breathable 2–3 gallon fabric pot.
2. Keep soil light and airy. Packed, heavy soil slows root development and slows the entire plant.
3. Water by feel, not on a timer. Let the top layer dry and learn the weight of the pot before you water again.
Those basics alone prevent 80% of early-run problems for new autoflower growers.
Autoflower cannabis does not need a strict 12 hours of darkness to start flowering. That’s the main difference from photoperiod plants. Most growers keep autoflowers under an 18/6 light schedule (18 hours on, 6 off) from start to finish. Some advanced indoor growers run 20/4 for even more light exposure.
This matters for two reasons. First, it removes the stress of “when do I flip to flower?” because autos flip on their own. Second, you can run autoflowers in the same space as vegging photoperiod plants, since you never have to cut light down to 12/12 for the autos. That’s how people get a steady rotation and constant bud coming down.
Outdoors, autoflowers will still bloom in long summer days. That’s why they work in northern and unpredictable climates where traditional plants sometimes don’t finish in time.
Most autoflower strains stay short and stocky, often in the 12 to 24 inch range. That compact frame is perfect for closets, tents with limited headroom, balconies, or any “stealth grow” setup.
Because transplant shock can trigger early flowering, most growers run each autoflower in its final container from the start. A 2–3 gallon fabric pot or air pot is the sweet spot for most indoor autos. It gives enough root room for a solid main cola and multiple side buds without forcing you to up-pot later.
One more tip: tight spaces can trap humidity around thick buds. Keep some airflow under the canopy and don’t pack the tent wall-to-wall. This helps prevent mold late in flower.
Buying autoflower seeds is not just about genetics on paper. It’s about trust, delivery, and support. Here’s what sets us apart:
• Proven genetics only. We focus on feminized autoflower seeds that have already shown fast finishing times, stable structure, and strong resin production in real grows — not mystery “budget bulk” stock.
• USA-friendly shipping. Orders are packed discreetly and shipped with tracking inside the United States, so you’re not waiting on international customs.
• Germination support. We offer direct guidance on how to start your seeds, how to avoid overwatering, and how to dial in light and airflow for a healthy first run.
• Real strain feedback. Our strain pages include buyer reviews and grow notes so you can see how a strain performs in actual home setups before you buy.
That combination — verified genetics, discreet shipping, real reviews, and real grow help — is why many customers consider us the best autoflower seed bank for U.S. growers.
Both “autoflower” and “feminized photoperiod” can be female-only seeds. The difference is how and when they bloom:
Autoflower seeds: These plants flip into flower automatically based on age, usually around week four. They don’t wait for a change in light cycle. Most are ready to harvest in about 8–10 weeks total, which is extremely fast. They also tend to stay short, which is perfect for small spaces or discreet grows.
Feminized photoperiod seeds: These plants are also bred to produce female flowers, but they behave like classic cannabis. They stay in veg under long light, then start flowering only after you switch them to something close to 12 hours of light and 12 hours of darkness. Photoperiod strains usually take longer overall, but you can shape/train them for larger total yield.
In short: Autoflower = speed and simplicity. Feminized photoperiod = full control and higher long-term customization.
Yes, and this is one of the biggest advantages of autos. Because many autoflower strains can finish in roughly 8 to 10 weeks from seed, growers in warmer states can stagger plantings and pull more than one outdoor harvest in a single season.
This matters if you’re growing in variable climates. Even if the weather shifts or the season is shorter than expected, a sturdy, fast-finishing auto can still deliver usable flower before cold, storms, or humidity issues ruin the crop. That’s something full-season photoperiod plants often can’t do because they rely on the natural shortening of daylight at the end of summer.
For anyone who wants steady personal supply, running autos in waves is one of the easiest ways to keep jars full.
A “cheap” pack can look tempting, but weak or unstable genetics can cost you an entire run. Here’s why:
• If the plant throws males, herms, or stalls early, you lose weeks of time and electricity.
• If the phenotype never bulks up or refuses to finish, you give up both yield and quality.
Premium feminized autoflower seeds from a trusted source are stabilized for timing, structure, terpene profile, and potency. That stability protects your harvest window and helps you get dense, resinous buds instead of airy, unreliable flower.
The bottom line: with autos, good genetics are not just “nice to have.” They are the difference between a fast, successful harvest and a wasted season.
Yes. We stand behind our autoflower seeds with a germination guarantee and post-purchase grow support. If you’re new to growing, that safety net matters. You’re not left guessing if something went wrong during the first 72 hours.
We also ship discreetly within the USA. Orders are packed for privacy and sent with tracking, so you get fast delivery without drawing attention and without waiting on international customs.
For full details, you can review:
• Help Center – germination support and answers to standard questions.
• Shipping Policy – how we pack, how we ship, and typical timelines.
Those three resources are designed to answer the two biggest buying questions: “Will these seeds actually start?” and “Will they arrive safely?”