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Top 10 fastest autoflowers of 2025
Sometimes you don't want to wait months to get your hands on some cannabis. While some may have the impression that a short growing cycle correlates to a weak and meagre harvest, this couldn't be further from the truth—at least in the case of these 10 autoflowers. Delve into our fastest autoflowers, which give photoperiods a run for their money.
Time is of the essence, especially for growers looking to get the most out of each season. Fast autoflowering strains offer a winning combination of speed, simplicity, and excellent results, making them the perfect choice for new and experienced cultivators. With short life cycles and compact growth, they're ideal for discreet grows, limited spaces, and regions with unpredictable weather.
Unlike photoperiod varieties, these strains bloom automatically under almost any light schedule and require less maintenance overall. And when we say “fast”, we mean it! These strains typically go from seed to harvest in just 8–9 weeks, without sacrificing flavour, potency, or yield. Whether you're aiming for multiple harvests per year or just eager to fill your stash jars quickly, these fast autoflowers are more than up to the task.
Top 10 Fastest Autoflowering Cannabis Strains
However, the most obvious benefit of autoflowers is their speed. With that in mind, we've assembled a list of the top 10 fastest autoflowering cannabis strains. The majority of these lightning-fast strains race from seed to harvest in 8 weeks or less, but one thing's for sure; they all deliver top-quality cannabis.
1. Passion Fruitz Automatic (Zamnesia Seeds)
Tropical, tasty, and turbo fast, Passion Fruitz Automatic brings exotic appeal to the world of quick autoflowers. This vibrant hybrid blends citrus terps with legendary OG Kush genetics, resulting in a fruity, resin-coated strain with a serious punch.
Packing 20% THC, Passion Fruitz’s high hits the sweet spot between blissful body relaxation and a bright cognitive boost. She grows to 140 cm and, just 8–9 weeks after germination, delivers impressive harvests of thick, frosty flowers in any environment.
If you're chasing fast results without compromising flavour or potency, Passion Fruitz Automatic earns its place as a top-tier pick for 2025.
2. Sweet Skunk Autoflowering (Sweet Seeds)
Compact, classic, and exceptionally quick, Sweet Skunk Autoflowering from Sweet Seeds delivers everything you know and love about old-school Skunk weed in a modern, fast auto package.
Topping out at a manageable 60–90 cm, this strain is a dream for small tents, stealthy balconies or low-key outdoor setups. Despite her size, she punches well above her weight, delivering up to 500 g/m² indoors just 7–8 weeks after germination. Talk about getting things done.
With her unmistakable earthy-sweet aroma, soothing body stone, and light mental lift, Skunk Autoflowering is absolute proof that you don't need to sacrifice quality for a quick turnaround.
3. AK-420 Automatic (Zamnesia Seeds)
AK-420 Automatic showcases machine-gun-like quickness when it comes to growing. Taking just 8–9 weeks from germination to harvest means that growers can get their hands on her precious buds without delay. Perfect for indoor, outdoor, and greenhouse cultivation, this is a well-rounded strain that'll appeal to newcomers and experts alike. Reaching heights of just 100cm means that AK-420 Automatic will easily slot into any growing space, giving growers plenty of options. Once ready, indoor harvests will hit around the 500g/m² mark, with outdoor yields of about 200g/plant.
Overall, AK-420 Automatic doesn't require any special treatment other than the standard level of upkeep, maintenance, and pruning, so growers are in for a relatively easy ride. The harvested buds boast earthy and skunky flavours alongside effects that are sure to soothe all those that try her.
4. Zkittlez OG Auto (Barney's Farm)
Bursting with tropical sweetness and soothing highs, Zkittlez OG Auto is a flavour-forward hybrid with serious grower appeal. As a fusion of the award-winning Zkittlez, classic OG Kush, and premium autoflowering genetics, this cultivar offers balanced effects, rich terpenes, and bountiful harvests, all with minimal effort.
From seed, this strain sprints through the flowering phase in just 7–8 weeks, thriving indoors or outdoors with very little maintenance required. It grows to medium heights (100–130 cm) and has excellent resistance to pests and mould. Come harvest time, expect sticky, resin-covered buds and yields of up to 600 g/m² indoors or 400 g/plant outdoors.
With bold notes of tropical fruit, candy, citrus, and earth accompanied by a relaxing, yet balanced head and body buzz, Zkittlez OG Auto is a must-try for fast-flowering auto fans.
5. Blueberry Glue Auto (Expert Seeds)
This 50/50 sativa/indica cultivar takes just 8–9 weeks from start to finish, yet delivers huge hauls of bud! Indoors, harvests can reach up to 650g/m², whereas outdoors, up to 700g/plant is possible in the best conditions. Initially, this cultivar stays pretty close to the ground, until she reaches the flowering stage; then, she'll begin to stretch out a little more—something to keep in mind for those with slightly pokier growing spaces.
With an average of 21% THC to her name, Blueberry Glue Auto delivers a full-bodied stone that's sure to relax all. Coupled with a flavour that leans heavily on the namesake blueberry, but with a bit of pine for good measure, it’s a highly enjoyable experience whether smoked, vaped, or made into delicious edibles.
6. La Diva (Delicious Seeds)
When we hear the word “diva”, it often conjures up visions of a difficult or demanding person. However, with La Diva, you're only in for a smooth experience. With some awesome parentage by way of Il Diavolo crossed with Blue Berry, La Diva provides some great features in the grow-op and the stash jar. She's a robust strain, demonstrating great resistance against mould, and is easily cultivated in both indoor and outdoor settings. Taking an almost unbelievably short 6–7 weeks to reach harvest, she is still capable of delivering up to 400–450g/m² indoors and 50–100g/plant under the sun.
Complete with a sweet, fruity taste and a pungent aroma, the experience of smoking La Diva will make you feel like a star, indeed. This is only enhanced by a THC level of 15–20%, which all but banishes worry from your brain.
7. Monster Mash Auto (Exotic Seed)
There's nothing scary about this strain; just some high-performing plants that make Monster Mash Auto a must-have. She'll be ready to harvest after a period of 7 weeks on average, and the results are simply breathtaking. Monster Mash Auto is a hybrid strain derived from American Kush and Black Domina. She's certainly high-yielding, clocking in at anywhere between 450–500g/m². For a plant that stands at around 85cm, this is a huge harvest. Just be sure to keep an eye on humidity and provide some maintenance along the way, and you too can enjoy her.
And enjoy you will; upon inhaling, a blanket of relaxation will immediately be cast over your body. From here, your eyes will droop with each additional hit, and you might just end up raiding the fridge if you finish an entire joint. And, though her scent is dank and Kush-powered, her flavour is more subtly sweet.
8. Auto Purple (Original Sensible)
-feminized.jpg "Auto Purple (Original Sensible)")
Auto Purple marries regal purple aesthetics with a graceful autoflowering pace and serious charm. Born from the noble Afghan Purple lineage crossed with sturdy ruderalis, she delivers stunning colours, compact stature, and robust yields.
With a moderate THC level, typically around 16%, Auto Purple offers a gentle yet soothing experience that melts body tensions without overpowering the mind. Growing just 60–120 cm tall, she remains discreet yet bountiful: indoors, expect up to approximately 400–550 g/m²; outdoors, around 30–60 g per plant under ideal conditions. Her full life cycle wraps up swiftly in just 50–60 days.
After drying and curing these precious purple colas, your senses will be greeted by spicy, earthy flavours with herbal undertones. You will taste a mix of sage, lavender, plums, and a hint of citrus from limonene, backed by a smooth spicy base of myrcene and caryophyllene.
9. Original Auto Skunk (FastBuds)
Taking just 8-9 weeks to race from seed to harvest, Original Auto Skunk has fast become a favourite among true cannabis connoisseurs. Her sweet and earthy buds will soon be in your hands, thanks to a smooth and enjoyable growing experience. She's low maintenance and is geared toward both indoor and outdoor growing projects. She'll reach heights of around 80–100cm, making her ideal for those that want a little discretion with their plants, or who simply want something smaller to take care of. When she's ready to yield, you'll see returns of 400–500g/m² indoors and 50–150g/plant outdoors.
True to her name, you'll be able to tell she's skunky before you even try her. The effects she brings are definitely relaxing and soothing (you’ll certainly feel every bit of her 20% THC content), but with some strong uplifting qualities, making Skunk Auto ideal for a night in with friends.
10. Green-O-Matic (Greenhouse Seeds)
Six weeks is all it takes to get a taste of Green-O-Matic. She's an autoflowering indica-dominant powerhouse that comes from quadruple genetics. Formed from the crossing of White Dwarf x Low Rider x Moroccan x ruderalis, she impresses where it counts! She's able to be grown at any time of year, and is robust enough to deal with some of the trickiest climates with ease. After her super-short growing cycle, you can anticipate some stunning indoor returns of up to 800g/m². Just take that in for a moment.
When it comes to smoking, she provides an overall mild but long-lasting high that is deeply relaxing and speckled with euphoria. A THC content of 15% hits just the right spot for smokers looking to somewhat maintain their ability to function.
Honourable mentions
Not quite in the top 10, these fast, flavour-packed autos are still serious contenders worth checking out:
- Pineapple Express F1 Autoflower (Zamnesia Seeds): Ready in 8–9 weeks; delivers energising highs with bold pineapple and citrus flavours.
- Atlas F1 Autoflower (Royal Queen Seeds): Finishes in just 70 days; highly resilient with sweet citrus-pine terps and a clear-headed effect.
- Gaia F1 Autoflower (Royal Queen Seeds): 6–7-week lifecycle; compact and ultra-potent with tropical fruit flavours and dense, shimmering buds.
- Grape Ape F1 Automatic (Zamnesia Seeds): Harvest-ready in 8–9 weeks; known for her rich grape flavours and deeply relaxing high.
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Fast, easy, and ready when you are
With autoflowering cannabis strains, there's no need to wait months for a quality harvest. Whether you’re working with limited space, chasing multiple harvests, or just want a smooth, easy, and speedy growing project, these cultivars deliver maximum satisfaction with minimal fuss. Short life cycles, compact plants, and impressive potency: what's not to love?
Want to start your next grow with speed on your side? Browse our full collection of fast autoflowering cannabis strains and get growing today!
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