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Autoflower seeds grow cultivars that switch to flower on their own based on age, so you do not have to mess with light schedules. They stay compact, finish fast, and work well for small spaces or growers who want quick, low-fuss harvests.
Autoflower seeds came from breeders working with Cannabis ruderalis, a hardy type of cannabis found in cooler regions with short summers. Ruderalis plants naturally start flowering based on age instead of daylight changes, so breeders saw that trait and wanted to bring it into more flavorful, potent cultivars.
They crossed ruderalis plants with popular indica and sativa cultivars, then kept selecting and backcrossing the offspring that showed strong auto traits along with better aroma, resin, and structure. After many generations, that auto flowering trait became stable, which is how we ended up with autoflower versions of classic cultivars you see on seed menus today.
If you are into classic cultivars with clear family ties to household names like Northern Lights and Girl Scout Cookies, check out Northern Lights Auto and Gorilla Cookies Auto. They bring fast, eager growth, chunky resin-coated buds, and that familiar loud terp profile in a quicker, self-flowering run that suits growers who want big flavor and a chill, feel good session without babying plants for months.
Many growers lean toward autoflower seeds when they want a straightforward, predictable grow. Autoflower cultivars switch to flower on their own as they age, so growers can keep one light schedule from start to finish without timing tricks. The quick life cycle and compact build fit small grow spaces, and staggered plantings make it easier to pull in several smaller harvests across the year.
Some growers opt for autoflowering versions of their favorite landrace strains to quickly grow their own supply. You can find auto versions of classics, including Durban Poison Auto and Chocolate Thai Auto, for example.
Autoflower just describes how the cultivars flower, not the sex of the plant. You can find both regular and feminized autoflower seeds, but most home growers reach for feminized autos so nearly every plant in the tent has a shot at growing chunky buds instead of turning out male.
And, to be fair, feminized autoflowers are much easier for growers to find.
Breeders still use regular autoflower seeds for making new crosses, yet for everyday growers who just want a simple run, feminized autoflowers cut down on guesswork and save space, since you are not tossing males partway through the grow.
We only carry feminized autoflower seeds, including great strains like White Runtz Auto, Pink Runtz Auto, Cotton Candy Kush Auto, and more.
Autoflower seeds move from sprout to harvest in a tight timeframe, so growers can fit in more cycles per year. Outdoor growers in cooler climates can still pull a solid crop from short summers.
Many autoflower cultivars stay short and bushy, which works well for balconies, patios, and tight indoor tents. The lower profile keeps things a bit more low key in shared spaces.
Since autos flip based on age, not light changes, you can keep one light schedule from start to finish. That setup makes it easier to run plants of different ages in the same room.
Autoflower cultivars feel forgiving for people still dialing in their setup. Shorter runs and resilient genetics give growers more chances to learn and still reach harvest.
Most autoflower cultivars run from seed to harvest in about 8 to 12 weeks, which is one of their big draws. Many finish closer to the 10 week mark, with a quick early stretch, then buds stacking up fast.
For example, Silver Haze Auto can take up to 12 weeks to fully grow, while both Triangle Kush Auto and Lemon Skunk Auto typically take roughly 8-10 weeks to blossom.
Some super fast autos can be ready in around 7 to 8 weeks, while bigger, heavier cultivars might lean closer to 12 or a bit more. Check each cultivar’s description, then plan your feeding and dry time around that window.
Not every cultivar has an autoflower take on it. Breeders tend to focus on big name favorites and proven genetics first, so you will see a lot of popular classics in auto form while more niche or newer cultivars might not have an auto line yet.
The autoflower market keeps growing, so more photoperiod cultivars get auto versions over time, but it is not a one to one thing.
All of the most popular strains have an autoflowering version. We carry popular strains like Gorilla Glue #4 Auto, Chemdawg Auto, and more.
Yes, autoflower seeds grow really well indoors, and a lot of growers run them in tents, closets, and small cabinets. Since they flip based on age, you can keep a steady 18 to 20 hours of light each day from start to finish and skip any light schedule tricks.
Their compact size fits tight spaces, and you can keep younger and older plants in the same room under one schedule. Give them decent airflow, fresh air, and a simple feeding plan, and autoflower cultivars can finish strong inside.
There are many popular autoflowering strains that do especially well with an indoor grow, including Do-Si-Dos Auto and Ghost OG Auto.
An autoflower plant can produce autoflower seeds, but only if the pollen that hits it carries the same auto trait. When an auto is pollinated by another solid autoflower, the seeds will usually grow into autoflower cultivars too.
If an autoflower gets hit with pollen from a regular photoperiod plant, the trait can get watered down, and the next generation might not all flip on their own. Most home growers skip the breeding side and just grab fresh, labeled autoflower seeds from a seed bank so they know exactly what they are planting.
Early autoflower cultivars had a rep for being weaker, but breeders have pushed way past that. Modern autos often hit THC levels that sit right next to their photoperiod parents, with the same loud terps and dense, frosty buds.
Potency comes down to genetics, grow conditions, and a proper dry and cure, not just the fact that a plant is auto. If you start with quality autoflower seeds from proven lines and give them a decent setup, you can pull harvests that hang with most photoperiod runs.
You can find super potent autoflowering cultivars like New Glue Auto, Grease Monkey Auto, and GG #4 Auto that all hit 30% THC, and there are some strains like Cadillac Rainbow Auto that hit as high as 39%.
Per plant, many autoflower cultivars still pull a bit less dry bud than big photoperiod cultivars, especially those long veg monsters people grow in big pots. Autos stay smaller and have a built in time limit, so you do not get that same long veg stretch to pack on bulk.
That said, newer autoflower lines hit surprisingly solid yields, and the short cycle means you can run more harvests through the same space in a year. With good light, decent pot size, and light training, autoflowers can give you steady, repeatable harvests that stack up nicely over time.
Some of the highest-yielding autoflower cultivars include Pink Lemonade Auto, Maui Auto, and Cotton Candy Kush Auto – all of which can yield over 35 ounces per plant when grown outdoors.
Autoflower seeds grow into cannabis plants that start flowering on their own based on age, not on light changes. Photoperiod strains only bloom when the light cycle is cut to 12 hours a day. Autos get this trait from Cannabis ruderalis genetics, and they move from seedling to flower on a set internal timeline.
Most autoflowers are ready to harvest about 8–12 weeks after germination, depending on the strain and how they’re grown. That’s often several weeks faster than photoperiod plants, so you can fit more than one harvest into an outdoor season, or run several cycles a year indoors.
Yes. You don’t need to manage light schedules, they have a short life cycle, and their compact size makes them easy to fit into small tents, closets or balconies. Beginner-friendly picks like Northern Lights Auto, Hindu Kush Auto and Bubble Gum Auto are known for forgiving, steady growth.
Autos don’t need a light change to flower, so most growers keep them on 18 hours of light and 6 hours of dark (18/6), or 20/4, from start to finish. Some growers run 24 hours of light, but 18/6 is a reliable balance between growth and energy cost.
Yes. Autoflowers do well outdoors because they finish on their own schedule, whatever the day length. This makes them a strong choice for short summers or northern climates. You can also plant them in late spring or early summer and still harvest before the cold weather arrives.
Most autoflowers stay compact, usually between 60 and 120 cm (2–4 ft) tall. Yields are typically smaller per plant than large photoperiod strains. Their fast turnaround and small footprint make up for it, because you can grow more plants in the same space or harvest more often. Check each strain’s yield and height details before you buy.
Yes. Our autoflower seeds are feminized, so up to 99.9% grow into female, bud-producing plants. If one turns out male or hermaphrodite, our Seed Guarantee covers you with free replacement seeds or store credit. Claims must be made within 90 days of delivery.
All Botanist seeds come with our Germination Guarantee. If more than 10% of the seeds in your order fail to germinate, we’ll replace the whole order free of charge. For the best start, follow our [step-by-step germination guide].
Pursuant to 7 U.S.C. § 1639o, “hemp” is defined as the plant Cannabis sativa L. and any part of that plant, including the seeds thereof, with a delta-9 THC concentration of not more than 0.3% on a dry weight basis. On January 6, 2022, the DEA formally affirmed that cannabis seeds meet this definition and are not controlled substances. These products are sold “as-is” and are not intended for planting, germination, or reproduction of cannabis/marijuana where it is not legal to do so. They are provided void of chemical treatment and are guaranteed to be free of noxious weeds. Information on this website is for educational and entertainment purposes only and is not intended to encourage, excuse, or endorse the illegal use of our products.
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