Autoflower Cannabis Seeds

Autoflower Seed Catalogue

Showing 24 of 156 strains. The remaining varieties are reachable through the catalogue filters above.

What Are Autoflower Cannabis Seeds?

Autoflower cannabis seeds produce plants that begin flowering on age rather than on day length. Most enter the flowering stage three to four weeks after germination, regardless of how many hours of light they receive, and reach harvest between seven and eleven weeks from seed. That single behaviour is what separates autoflower seeds from every other seed type on the market.

The trait comes from Cannabis ruderalis, a low-growing wild subspecies native to the Volga River basin and the southern reaches of Siberia. Ruderalis evolved in a climate where summers are short and daylight is unreliable, so selecting for a light-independent flowering trigger was an evolutionary necessity rather than an advantage. Breeders crossed it with indica and sativa lines to move that trigger into commercial genetics.

What the finished plant looks like depends on how much ruderalis remains in the genotype. Modern autoflowering cannabis seeds typically carry between 5% and 30% ruderalis. Lines at the low end — around 5% — behave and taste close to their photoperiod parents while still flowering automatically. Lines at 25–30% flower faster and stay shorter, but usually test lower for THC, because ruderalis contributes very little cannabinoid content of its own. That percentage is the single most useful number on a strain page and the reason two autoflower marijuana seeds with identical flowering windows can produce entirely different harvests.

One correction worth making: autoflowering marijuana seeds are not genetically engineered. The autoflowering trait was moved between subspecies by conventional crossing and multi-generation selection — the same method used for tomatoes and wheat. No transgenic technique is involved in producing marijuana autoflower seeds sold commercially.

How Do Autoflower Seeds Differ From Photoperiod Seeds?

Autoflower seeds finish in 7 to 11 weeks; photoperiod seeds take 12 to 20 weeks. Every other difference between the two types follows from one mechanical fact: photoperiod plants need the grower to switch the light cycle to 12 hours on and 12 hours off before they will form buds, and autoflower plants do not.

Removing that decision removes the most common failure point in a first grow. A grower running photoperiod genetics has to judge when the plant is large enough to flip, and an error in either direction costs weeks. Autoflower plants flip themselves. The trade-off is that the timeline is fixed — the plant will not wait while a grower corrects a mistake, and stress during the first three weeks permanently limits final size.

Photoperiod genetics win on two of those rows honestly. They yield more per plant, and they can be cloned — a cutting taken from a photoperiod mother restarts its own vegetative stage, while an autoflower clone carries the mother's biological age and flowers on her schedule. Growers who want a permanent mother plant should not buy autoflower seeds.

A common search — autoflower vs feminized seeds — rests on a false opposition. Feminization and automatic flowering are separate traits on separate axes, and most autoflower seeds carry both. In the Turbo Autoflower Seeds catalogue, 150 of 156 autoflower strains are feminized autoflower seeds; the remaining six are regular. The real comparison is autoflower against photoperiod, and the table above is it. Modern autoflowers have also closed most of the potency gap that existed a decade ago: current lines routinely test in the same 20–26% range as many photoperiod cultivars, with the outcome set by phenotype, environment and harvest timing rather than by seed type. See why autoflower clones don't work for the mechanism.

Who Should Grow Autoflower Seeds?

Autoflower seeds are not universally better than photoperiod seeds — they are better for four specific situations. Growers running a first or second grow, growers working in tents and closets, growers in short-summer climates, and growers who need a low-profile setup all get more from an autoflower than from a photoperiod plant. Everyone else should weigh the yield difference first.

How to Choose Autoflower Seeds

Five attributes decide whether a pack of autoflower seeds suits a given setup: parent genetics, flowering window, yield potential, feminization, and pack size. Marketing copy tends to lead with THC, which is the least predictive of the five — potency varies more with environment than with the number printed on the pack. The list below runs in the order that actually affects the outcome, and each item ends with the filter to apply in the catalogue.

How Important Is Genetics in Autoflower Seeds?

Ruderalis supplies the flowering trigger and almost nothing else. Aroma, bud density, internode spacing, terpene profile and stress response all come from the indica or sativa parent. Two autoflowers that finish in the same nine weeks will produce different harvests if their parent lines differ, so parent lineage deserves more weight than any headline figure.

Stability is the second half of this question, and it is a breeding-programme property rather than a strain property. Turbo Autoflower Seeds stabilises every line across a minimum of four generations using population selection — several hundred plants evaluated per generation for uniform flowering time, structure and terpene expression — rather than selecting a single standout plant and reproducing it. Population work is slower and it is the reason a pack of ten behaves like ten siblings instead of ten strangers. Buyers comparing best autoflower seeds across suppliers should ask how many generations a line has been stabilised before comparing anything else. Filters worth using here: auto flower indica seeds, sativa autoflower seeds, hybrid, and cbd autoflower seeds for CBD-dominant lines with THC below 1%.

What Flowering Time Should You Expect?

Seven to eleven weeks from seed covers the great majority of autoflower strains. Sativa-leaning lines with heavy haze influence can extend to thirteen or fourteen. Breeders publish a window rather than a date because environment moves the finish line by several days in either direction.

Four factors do most of that moving: light intensity, container volume, root-zone temperature, and any stress in the first three weeks. A plant that spent week two recovering from overwatering will finish late and small, and no amount of correction afterwards recovers the lost vegetative time. Growers with a fixed schedule should read the published window as a range, not as a promise, and plan against its upper bound. Strains at the fast end of the scale get their own section — see 45-day autoflowers.

How Much Yield Do Autoflower Seeds Produce?

A well-grown autoflower produces roughly 3 to 6 oz (85–170 g) of dry flower per plant indoors, or about 300–500 g/m² across a filled canopy. Outdoors in full sun, the same genetics often match or exceed those numbers because height is no longer constrained. High yield autoflower seeds — the heavy and very heavy tiers in the catalogue filter — sit at the top of that range and typically need an extra week.

Two inputs dominate the result. Light intensity is first: the same seed under a 300 W LED and under a compact fluorescent produces harvests that differ by a factor of three. Container volume is second, and autoflowers are unusually sensitive to it because there is no time to recover from a late transplant. A 3–5 gallon (11–19 litre) fabric pot, filled once and never changed, is the standard recommendation. Growers who want a figure for their own setup can consult the calculated yield estimates below.

Should You Choose Feminized or Regular Autoflower Seeds?

Feminized autoflower seeds produce female plants in almost every case, which removes the work of sexing a crop and pulling males before they pollinate. This is the commercial standard: 150 of the 156 autoflower strains in this catalogue are feminized autoflower seeds.

Regular autoflower seeds produce a mix of sexes and exist for a different job — breeding. A grower who wants only flower should buy feminized. A grower who wants to make crosses needs males, and therefore needs regular seeds. More on regular autoflower seeds and who buys them.

What Pack Size Should You Buy?

Pack size trades cost against risk in both directions. A small pack limits the loss if a new strain turns out to suit neither the space nor the taste. A large pack lowers the price per seed sharply and gives more attempts at finding a strong phenotype from the same line. Across the wider market, the per-seed price for autoflower seeds runs from about $1.50 in bulk to $19.00 for a single premium seed — a spread of more than twelve times for the same product category, which is why the per-seed figure belongs on every listing.

First-time buyers testing an unfamiliar line are usually best served by three or five seeds. Growers committed to a strain, and anyone hunting a keeper phenotype, get materially better economics at ten and above. Bulk and wholesale pricing starts at 100 seeds.

Fast-Finishing Autoflowers: 45-Day Seeds

A small group of autoflower strains finishes in about 45 days from germination — six to seven weeks, against the eight to eleven that is typical. These 45 day autoflower seeds are bred by pushing ruderalis content toward the upper end of the range and selecting hard for early flower onset in successive generations.

Speed is paid for, and the honest accounting matters more than the marketing. The fastest autoflower seeds generally finish shorter, yield less per plant, and test lower for THC than a nine-week line from the same breeding programme. A 45-day strain producing 70–110 g per plant at 15% THC is doing what it was designed to do; a strain claiming 45 days alongside 28% THC and 250 g per plant is claiming something the trade-off does not permit.

Where the speed pays off is throughput rather than any single harvest. Because flowering starts on age, plants at different stages coexist under one fixed 18/6 schedule — something photoperiod genetics cannot do without separate rooms. Sowing a new batch every two weeks produces a harvest every two weeks once the cycle reaches steady state. Four staggered batches under one light turn roughly 110 g per plant into a continuous supply rather than four spikes a year. This is the perpetual harvest method, and it is the strongest argument for super autoflower seeds at the fast end of the range.

Autoflower Seeds: Pros and Cons

Most category pages in this market list advantages only. The list below includes the real limitations, because a grower who buys autoflower seeds expecting photoperiod yields will be disappointed by a product that is performing exactly as designed.

Autoflower Grow Timeline and Yield Estimates

The first table below sets out calculated yield estimates for a plant grown indoors in a 5 gallon / 19 L container, across four light sources and three strain classes. Every figure is derived from a 130 g baseline rather than measured, and each is given as a range because the same seed in the same tent varies by 20% or more between runs. The second table adjusts those results for other container sizes and environments.

How to Grow Autoflower Seeds

Autoflower cultivation differs from photoperiod cultivation in three places: the light schedule never changes, the plant drinks and eats less, and the window for training is narrow and closes early. Everything below applies where cultivation is lawful under national and local rules, and growers are responsible for confirming that before germinating anything.

Light Schedule: 18/6, 20/4 or 24/0

Autoflower plants perform well anywhere from 18 to 24 hours of light per day, and the schedule is held constant from germination to harvest. There is never a 12/12 flip.

18/6 is the default and the most economical. Moving to 20/4 or 24/0 adds growth rate and some final yield, because photosynthesis time increases while the flowering clock keeps running on age. The cost is electricity: on a 200 W LED at $0.15/kWh, 18/6 runs about $16 per month and 24/0 about $22 — roughly $15 extra across a ten-week grow for a yield gain in the region of 5–10%. Growers with cheap power should run 20/4; growers watching the meter lose very little at 18/6. The six-hour dark period also gives root-zone temperature a chance to fall, which matters in warm tents.

Watering, Feeding and pH

Autoflower root systems are smaller than photoperiod root systems, and the most frequent cause of a stunted autoflower is too much water rather than too little. The growing medium should dry appreciably between waterings — lifting the pot is a more reliable test than looking at the surface.

Target pH is 6.0–7.0 in soil and 5.5–6.5 in coco coir, measured in the input solution. Nutrients are given at roughly half the dose printed on the bottle for the first half of the run, because a plant that reaches only two feet cannot use a feeding programme written for a plant that reaches six. NPK ratios around 10-7-5 during vegetative growth and 5-10-10 during flowering are common starting points, and CalMag supplementation is usually needed under LED and in coco. These figures are orientation values: substrate, water hardness and manufacturer concentration all shift them, so growers should treat the label as the authority for their specific product. Exact volumes by week are in the week-by-week schedule above.

Training: What Works and What Kills the Grow

Low-stress training works well on autoflowers. Bending the main stem sideways and tying it down opens the canopy, improves light penetration to lower sites and costs the plant almost no recovery time. The window runs from roughly the third node until the end of week three — after that, the plant has committed to flowering and reshaping it wastes energy that will not be replaced.

High-stress techniques are a different matter. Topping removes the apex and demands a recovery period that a photoperiod plant can absorb in an extended vegetative stage and an autoflower cannot. Growers who top an autoflower after week three routinely lose 20–30% of final yield. Heavy defoliation and supercropping carry the same risk. The safe rule: shape the plant before week three with LST only, and after week three remove nothing beyond dead or fully shaded fan leaves.

Cannabis ruderalis

A low-growing wild cannabis subspecies native to the Volga River basin and southern Siberia, and the source of the age-based flowering trait.

Photoperiod

A cannabis plant that begins flowering only after the light cycle is changed to 12 hours on and 12 hours off.

Low stress training

Bending and tying the main stem sideways to open the canopy without cutting tissue, safe on autoflowers until the end of week three.

Perpetual harvest

Sowing new plants at fixed intervals under one constant light schedule so that a harvest arrives every few weeks rather than once a season.

How to Germinate Autoflower Seeds

Germinating autoflower seeds follows the same biology as any cannabis seed, with one difference that changes the procedure: transplanting costs an autoflower more than it costs a photoperiod plant, because the vegetative stage is too short to absorb the recovery time. Sowing directly into the final container is the recommended method rather than a convenience.

1. Soak. Place the seed in room-temperature water for 12 to 18 hours, until it sinks. Seeds still floating after 18 hours can be lightly pressed under the surface once.
2. Pre-sprout. Move the seed between two damp paper towels inside a closed container at 21–25 °C in darkness. A taproot appears in 24 to 72 hours. Seeds that have not opened after five days are unlikely to.
3. Sow into the final pot. Once the taproot reaches 5–10 mm, plant it 10–15 mm deep, root pointing down, in a lightly moistened low-nutrient medium in the 3–5 gallon container the plant will finish in.
4. Hold humidity. Keep the surface damp but never saturated and relative humidity around 65–70% until the first true leaves appear, typically three to five days after sowing.
5. Start light immediately. The 18/6 schedule begins at emergence. Seedlings need less intensity than mature plants — a strong LED at close range will bleach them before they establish.

Germination rates above 90% are normal for fresh, correctly stored seed. Rates fall with age, heat and humidity, which is why seeds should be kept cool, dark and dry until use.

Regular, Bulk and Wholesale Autoflower Seeds

Two buyer groups are poorly served by standard feminized packs, and both are worth addressing directly.

Regular autoflower seeds produce roughly half male and half female plants, and that is the point of them. Breeders need male pollen to make crosses, and feminized seed cannot supply it. Anyone developing a new autoflower line, preserving a genotype through open pollination, or running a phenotype hunt with the intention of breeding forward needs regular autoflower seeds rather than feminized ones. They are not a cheaper or lower grade of feminized seed — they are a different tool. Growers producing flower only should not buy them, since half the pack will need removing before it pollinates the rest.

Bulk and wholesale autoflower seeds serve licensed operators, dispensary suppliers and retailers reselling under their own label. Pricing steps down substantially above 100 seeds, and orders at 500 and above ship as a single sealed batch from one production run, which keeps phenotype variation to a minimum across a commercial planting.

Wholesale orders are handled outside the standard checkout. Enquiries including target strain, quantity and destination country go to the trade desk at [email protected], which responds with availability and lead time within two business days.

Legal Status and Worldwide Shipping

The legal position of cannabis seeds differs from the legal position of cannabis plants, and the two should not be conflated. In many jurisdictions the seed itself contains negligible THC and is traded lawfully as a collectible or as hemp material, while germinating that same seed is regulated separately and sometimes prohibited outright. Buyers are responsible for establishing which rules apply where they live before ordering.

United States. The 2018 Farm Bill removed hemp — defined as cannabis material containing less than 0.3% delta-9 THC on a dry-weight basis — from the federal controlled substances schedule, and cannabis seeds fall under that threshold. The Drug Enforcement Administration confirmed this reading in a 2022 letter addressing seeds and tissue culture specifically. Federal legality does not override state law: several states restrict possession or cultivation regardless of the federal position, and buyers should check their own state and municipality.

Elsewhere. Seed law varies more between countries than any other aspect of this trade. Some permit sale and possession but not germination; some permit personal cultivation within a plant limit; some prohibit both. National rules also change faster than any page can track, so buyers should verify current local law rather than relying on this or any other retailer's summary.

Orders ship in unbranded, sealed outer packaging with no reference to contents on the exterior. Standard tracked delivery runs 5–9 business days within the EU and the United Kingdom and 7–14 business days to North America. Shipping is free on orders over $99; below that threshold it is charged at $9.95 tracked. Customs handling remains the buyer's responsibility, and Turbo Autoflower Seeds makes no representation about clearance in any jurisdiction.

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This site is restricted to visitors aged 21 and over. Age confirmation is required before an order can be placed, and the restriction exists to keep cannabis-related commerce away from minors rather than as a formality.

Who Grows and Tests These Seeds

Every line in this catalogue goes through the same sequence before it is offered for sale. A cross is grown out at a population of 300 to 500 plants per generation. Each generation is scored for flowering-time uniformity, final height, structure and terpene expression, and the tightest cohort is carried forward. Lines are held for a minimum of four generations, and a line that still shows more than seven days of variance in flowering time at F4 is discarded rather than released.

Germination is tested separately. A 100-seed sample is pulled from every production batch and germinated under the same conditions described in the germination section above; batches falling below 90% are not packed. Trial grows are run in-house on each released line — the photographs in the strain pages are from those runs rather than from stock libraries.

Buyers comparing suppliers for the best autoflower seed bank should treat this kind of disclosure as the minimum, not as a distinguishing feature: a seller who cannot describe how a line was stabilised or how germination was verified is asking for trust without offering evidence.

Autoflower Seeds: Frequently Asked Questions