Fastest Seed To Harvest Weed

Both autoflowering seeds and photoperiod strains. The fastest flowering cannabis strains to grow from seed to harvest. Ordered by quickest start to finish Do you know which are the fastest growing autoflowering plants? In this post you will discover the fastest automatic seeds… Get a head start and discover the fastest autoflowering weed strains available today—strains that are so fast, you'll be enjoying them in less than 2 months.

20 FASTEST Flowering Strains to Grow from Seed

Both autoflowering seeds and photoperiod strains. The fastest flowering cannabis strains to grow from seed to harvest. Ordered by quickest start to finish grow time.

Fastest Flowering Autoflower Strains

Sour Crack Auto

THE FASTEST autoflowering strain that Mephisto Genetics has ever grown, Sour Crack Auto finishes in only 7 weeks from seed (germination). Sour Crack Auto is made from Green Crack Auto and 24 Carat genetics. The short plants stay 20 to 28 inches tall, forming rock-hard, resinous buds in quick time. A great strain for commercial quality Sea of Green autoflower grows. High potency nuggets tested near 20% THC.

Flowering Time 7 weeks
Strain Breeder Mephisto Genetics
Pack Size 1/3/7/18 seeds
Yield Indoors: 30–60 g/plant
Outdoors: 60+ g/plant

Buy Sour Crack Auto Feminized Seeds

+ Speed Auto

+ Speed Auto by Sweet Seeds are among the quickest finishing autoflower seeds to grow, being ready to harvest at just 7 weeks from germination. This strain is comprised of the breeder’s own Critical Mass and Speed Devil #2 Auto genetics, bred for yield and deep aromatic properties. + Speed Auto does well both indoors and outdoors. The plants grow 20 to 35 inches in height, producing harvests up to 150 grams each. Tastes sweet, fruity, and cheesy.

Flowering Time 7 weeks
Strain Breeder Sweet Seeds
Pack Size 3/5/10/25/100 seeds
Yield Indoors: 350–500 g/m2
Outdoors: 30–150 g/plant

Buy + Speed Auto Feminized Seeds

Fast Bud #2 Auto

Fast Bud #2 improves upon Sweet Seeds’ Fast Bud line, a member of the Diesel family of cannabis. This award-winning sativa dominant autoflower strain is quick to mature at 7 to 8 weeks from seed. Only reaching 20 to 35 inches in height, the short plants are multi-branched and form a large number of bud sites, making it an easy strain to grow with very productive yields. Fast Bud #2 Auto has a sweet aroma, exotic taste, strong head high, and powerful body stone. 15–20% THC.

Flowering Time 7–8 weeks
Strain Breeder Sweet Seeds
Pack Size 3/5/10 seeds
Yield Indoors: 350–500 g/m2
Outdoors: 20–70 g/plant

Buy Fast Bud #2 Auto Feminized Seeds

Sweet Skunk Auto

Sweet Skunk Auto is one of Sweet Seeds’ best-yielding and most resinous autoflower weed strains. Genetically, it’s a hybrid of Early Skunk and Critical Mass, backcrossed twice to Early Skunk. The plants grow rapidly and get 24 to 35 inches tall, finished at just 7½ weeks from germination. Its buds are dense and covered in trichomes. Intense skunk aromas with a sweet and spicy background. Physically relaxing with an uplifting head high. 16–20% THC.

Flowering Time 7½ weeks
Strain Breeder Sweet Seeds
Pack Size 3/5/10/25/100 seeds
Yield Indoors: 400–550 g/m2
Outdoors: 35–150 g/plant

Buy Sweet Skunk Auto Feminized Seeds

Alaskan Purple Auto

Alaskan Purple Auto by Seedsman, one of the best seed banks, is a 90% indica purple weed strain that produces good yields in a short time. It finishes growing at 8 weeks from seed, with some phenotypes ready to harvest at week 7. They are easy growing, sizable plants for an autoflowering strain that mature one week later when grown outdoors. Ripe, fruity sweet flavors, and 15–20% THC content.

Flowering Time 7–8 weeks
Strain Breeder Seedsman
Pack Size 1/3/5/10/100 seeds
Yield Indoors: 400–550 g/m2
Outdoors: 40–200 g/plant

Buy Alaskan Purple Auto Feminized Seeds

Crystal Candy XL Auto

Crystal Candy XL Auto is a large autoflowering marijuana strain bred from tall phenotypes of Sweet Seeds’ Crystal Candy Auto line. This mostly sativa variety is suitable for both indoor and outdoor growing. The plants reach a height of 35 to 55 inches, ready for harvest only 8 weeks from seed. Its buds are packed with trichomes and have a very fruity scent. 14–19% THC.

Flowering Time 8 weeks
Strain Breeder Sweet Seeds
Pack Size 3/5 seeds
Yield Indoors: 425–650 g/m2
Outdoors: 60–300 g/plant

Buy Crystal Candy XL Auto Feminized Seeds

Sweet Gelato Auto

Sweet Gelato Auto by Sweet Seeds is an autoflowering version of one of the most prestigious cannabis strains from the Bay Area—Gelato (Sunset Sherbet x Girl Scout Cookies “Thin Mint”)—crossed to Killer Kush Auto. The resulting plants offer generous yields in just 56 days from germination. Its dense buds are covered in large trichomes. The scent is earthy, sweet, and fruity with hints of mint and citrus. 18–23% THC.

Flowering Time 56 days
Strain Breeder Sweet Seeds
Pack Size 3/5 seeds
Yield Indoors: 375–500 g/m2
Outdoors: 50–175 g/plant

Buy Sweet Gelato Auto Feminized Seeds

Sweet Cheese XL Auto

Sweet Cheese XL Auto is a fast and furious Cheese strain that offers greater size, yield, and resin production than Sweet Seeds’ original Sweet Cheese Auto. This mostly sativa strain autoflower is ready to harvest at 8 weeks from seed, growing to a height of 30 to 55 inches. It has an intense, remarkably sweet, skunky scent and powerful yet relaxing high. 15–20% THC.

Flowering Time 56 days
Strain Breeder Sweet Seeds
Pack Size 3/5/25/100 seeds
Yield Indoors: 375–600 g/m2
Outdoors: 45–190 g/plant

Buy Sweet Cheese XL Auto Feminized Seeds

Purple Punch Auto

Purple Punch Auto is a fast, productive, and flavorful autoflower variety sold by Barney’s Farm Seeds. A top performer indoors and out, this low-maintenance, mostly indica strain shows resistance to mold, mildew, mites, and cold weather. The plants max out at 31 inches tall over their short lifecycle that takes between 50 to 60 days from seed. Its colorful, dense buds are rich in resin and terpenes with scents of sweet apple pie and cloves. Up to 18% THC.

Flowering Time 50–60 days
Strain Breeder Barney’s Farm Seeds
Pack Size 1/3/5/10 seeds
Yield Indoors: 350 g/m2
Outdoors: 400 g/plant

Buy Purple Punch Auto Feminized Seeds

Chocolate Skunk Auto

A “60-day wonder” strain being ready to cut 60 days from seed germination, Chocolate Skunk Auto by 00 Seeds is an autoflowering hybrid of Chocolate Skunk and ruderalis genetics. The plants grow large for an auto strain at over 40 inches tall. Chocolate Skunk Auto produces beautiful compact, crystal-covered buds that smell great. 17% THC.

Flowering Time 60 days
Strain Breeder 00 Seeds
Pack Size 3/5 seeds
Yield Indoors: 250–350 g/m2

Buy Chocolate Skunk Auto Feminized Seeds

Fastest Flowering Photoperiod Strains

Gigabud

Gigabud is a Big Bud and Northern Lights hybrid that finishes flowering in a speedy 5 to 6 weeks. These thirsty, medium-sized plants grow vigorously in veg and flower, producing massive quantities of resinous, fruity buds. There is also an autoflowering Gigabud strain for sale.

Flowering Time 5–6 weeks
Strain Breeder G13 Labs
Pack Size 5 seeds
Yield 450+ g/m2

Buy Gigabud Feminized Seeds

Hash Plant

The famous Sensi Seeds Hash Plant indica originates from Afghani genetics bred in the Northwest United States that was brought to Sensi Seeds in Holland, where it was crossed to another Afghan variety—Northern Lights. Ready to harvest in as quick as 40 days from flowering, Hash Plant seeds grow fast, in a stout, thick manner. The buds are super dense, very sticky, and ideal for making hash. A good choice for breeders.

Flowering Time 40–45 days
Strain Breeder Sensi Seeds
Pack Size 10 seeds
Yield 400–500 g/m2

Buy Hash Plant Regular Seeds

Green Poison Fast

Green Poison Fast by Sweet Seeds is a top-quality weed strain that forms super frosty and tight buds. This unique feminized seed strain was made by breeding out the ruderalis gene present in the original autoflowering Green Poison to create a remarkable, high-yielding photoperiod variety. 70% indica genetics are responsible for its fruity, heavy, and dank marijuana buds.

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Flowering Time 6 weeks
Strain Breeder Sweet Seeds
Pack Size 3/5/10/25/100 seeds
Yield Indoors: 500–600 g/m2
Outdoors: 500–700 g/plant

Buy Green Poison Fast Version Feminized Seeds

Passion #1

Passion #1 is an outdoor indica strain from the seventies in California that made its way over to Holland during the eighties. This stable, easy-to-grow regular seed strain gets huge both outdoors and indoors, finishing its flowering cycle in a mere 6 weeks of bloom time. Passion #1’s citrus-like buds are long, dense, and full of resin. 18.6% THC content.

Flowering Time 6 weeks
Strain Breeder Dutch Passion
Pack Size 10 seeds
Yield 250–750 g/plant

Buy Passion #1 Regular Seeds

Tropicanna Poison F1 Fast

Tropicanna Poison F1 Fast by Sweet Seeds is an excellent fast flowering strain bred for speed and potency. It was created using an elite Tropicanna Cookies clone crossed to a red flower phenotype and Red Poison Auto. Roughly 80% of the resulting plants get red bud coloring. This very productive variety is finished at only 6 to 7 weeks of bloom. The buds are dense, extremely resinous, and have intensely sweet scents and flavors. 16–24% THC.

Flowering Time 42–49 days
Strain Breeder Sweet Seeds
Pack Size 3/5 seeds
Yield Indoors: 450–600 g/m2
Outdoors: 400–650 g/plant

Buy Tropicanna Poison F1 Fast Feminized Seeds

Big Nugs Fast

As the name suggests, Big Nugs Fast grows big nugs—fast. It’s a photoperiod hybrid that’s ready to harvest in only 6 to 7 weeks flowering time. This high yield weed strain is bred from Big Bud / Critical Mass (Afghani x Skunk) crossed to Seedsman’s fast-finishing male. Similar to Big Bud, Big Nugs Fast grows thick heavy buds, which may need to be propped up during flowering. Yields are high—expect dense, pine cone-shaped buds with fruity, hashy qualities.

Flowering Time 6–7 weeks
Strain Breeder Seedsman
Pack Size 1/3/5/10/100 seeds
Yield 450–550 g/m2

Buy Big Nugs Fast Feminized Seeds

C99 x Blueberry Fast

C99 x Blueberry Fast is a rapid flowering, mostly sativa weed strain that’s ready to harvest in just 45 days from the start of bloom cycle. The infamous C99 strain is crossed to Blueberry and then bred with Seedsman’s fast parent, resulting in sativa dominant seeds that finish quickly. Its Thai genetics present help C99 x Blueberry Fast grow big during flowering, so expect some stretching. High yields of thick, potent marijuana buds.

Flowering Time 6–7 weeks
Strain Breeder Seedsman
Pack Size 1/3/5/10/100 seeds
Yield 350–450 g/m2

Buy C99 x Blueberry Fast Feminized Seeds

Gorilla Girl F1 Fast

Gorilla Girl F1 Fast by Sweet Seeds is an extra-fast version of Gorilla Girl featuring extreme potency and production. The sativa dominant plants are ready to harvest after just 7 weeks of flowering. Its buds are known for their high resin content, with calyxes completely covered in frosty trichomes. The aroma and taste are sweet and fruity with earthy, woody notes. Strong effects—up to 24% THC.

Flowering Time 49 days
Strain Breeder Sweet Seeds
Pack Size 3/5 seeds
Yield Indoors: 400–500 g/m2
Outdoors: 350–600 g/plant

Buy Gorilla Girl F1 Fast Feminized Seeds

Pineapple Express #2

Pineapple Express #2 is a faster flowering, higher-yielding version of G13 Lab’s original Pineapple Express. A favorite weed strain among growers in humid climates, Pineapple Express #2 grows huge outdoors and has high resistance to mold and moisture. Its buds are large, fruity, and full of trichomes.

Flowering Time 45–50 days
Strain Breeder G13 Labs
Pack Size 5 seeds
Yield Indoors: 700 g/m2
Outdoors: 900–1300 g/m2

Buy Pineapple Express #2 Feminized Seeds

Pakistan Valley

Originating from the Hindu Kush mountains, Pakistan Valley by WOS is a landrace pure indica cannabis strain that grows quickly, finishing its flowering phase in just 45 to 55 days. It is a compact, vigorous grower, especially suited towards dry climates where its buds bulk up dense and resinous. Super sticky and potent—over 20% THC. For sale as both regular and feminized seeds.

Flowering Time 45–55 days
Strain Breeder World of Seeds
Pack Size 10 seeds
Yield Indoors: 400 g/m2
Outdoors: 700 g/m2

Buy Pakistan Valley Reg / Fem Seeds

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13 thoughts on “20 FASTEST Flowering Strains to Grow from Seed”

Consider Bubba’s gift from Humboldt seeds. 6 weeks flowering and nice purple hues

Im growing Bubbas Gift this season and it hasnt started to show sex yet. Just hope its done before the 1st week of October. Weather in the North East US can get really crappy in Oct . Anybody else out there have experience with this strain?

Speedy Chile fast by royal Queen is the fastest I’ve heard of. It’s finished in 56 days from germination and only needs 14 days veg. 16% Thc. Fem photo 80-100cm tall and 500+ grams per m2 indoor. Critical poison fast should be on the list too. Finished in 40-45 days 18% thc Fem photo 500+ grams per m2 indoor.

HI bro, how many plants per m2 can u grow with these??

Wow. This is a real treat for both the consumers and the farmers. Personally, I like Green-O-Matic Auto. It sorts of suits me. Thanks a lot for sharing.

Pineapple Express #2 from G13 Labs all day on my 3rd run with this strain and I have more chasing it

Bro, i have a special pheno of her, been runnin her for like 4 years now.. Its amazing what she does in just 50 days… I like to run an extra 10 days though…

got some free seeds from just cannabis seeds and so I thought I would throw a few of them in the dirt, only one was fem and a hearty little sativa that I topped 3 times for max yield and about 45 days in it looked like I was well on my way to getting 1/2 lb off of her when the buds fattened up in coming weeks considering I had about 4 more weeks before harvest, but just for fun I thought I would check the trichomes at a time I felt was early, and WTF. I’m sitting on 15 to 40% amber and no clear trichomes, in 45 days, on a pure sativa!! Well my yield wont be as big but its an early surprise. Wish I would have cloned her,

Just leave a couple small buds and regenerate growth after your harvest.

Lemon Pie Auto takes 3 months/12 weeks seed to buds

Gorilla Girl F1 Fast is my favorite. Not sure if anyone likes it too.

Fast Bud #2 Auto seems one of the exciting options. But I haven’t tried it. Can anyone share how exactly would it be?

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Fastest Autoflowering Cannabis

Automatic flowering varieties are the easiest to grow, resistant, adaptable, strong and especially fast. Some stand out for their large production, others contain a good aroma and taste, some are quite powerful, but in this post we will review the autoflowering genetics with a faster cycle. Are you in? Let’s have a look at them…

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What are the fastest growing Autoflowering varieties?

Autoflowering plants don’t rely on light or dark hours to grow and flower like photo-dependent cannabis plants. Auto strains begin flowering once they reach sexual maturity, and it may come 3 or 4 weeks after germination.

The fastest autoflowering plants are those that bloom with only 20 days of growth. The problem with these plants is that they do not have time to reach a good size before they start to flower, so they are quite small.

Fastest automatic seeds on the market

The first 100% autoflowering commercial varieties were Lowryder, which take just 60 days from seed to harvest. They are undoubtedly the fastest autoflowering cannabis plants in history.

From the Lowryder came the Lowryder#2, which needed a few more days to complete its cycle, but it is of higher quality. The vast majority of autoflowering strains nowadays come from crosses with Lowryder#2, and have a total growing cycle of 65 or 70 days or more

One of the fastest marijuana plants in the world! To achieve this impressive variety, the breeders have genetically fused a Lowrider #2 and a Ruderalis, resulting in a plant with a flowering time of only 6-7 weeks, with a very rich and powerful flavor, with an effect that will leave you really touched…

Features
Type : Autoflowering
Banque : Bulk Seed Bank
Génétique : Lowryder #2 x Ruderalis
Phénotype : 70% Indica / 10% Sativa / 20% Ruderalis hybrid
Cycle de culture : 60 jours
THC:14-19%

Among the descendants of the Lowryder, the fastest autoflowering varieties can be Grass-O-Matic’s AutoMass and Dinafem’s Critical Auto. These were two of the first autoflowering versions on the market and, although they were very fast, their quality was still not comparable to the current ones.

Don’t rely too much on people telling you that you can harvest a cannabis plant in less than 50 days from germination, because it’s impossible for it to be ripe or to have reached a good size.

Faster and more productive autoflowering seeds

These are the really interesting ones, the ones that offer a great balance between speed and performance. The automatic genetics that take the least time to produce a large crop usually have a whole culture cycle of 70 to 75 days, and among them the following stand out:

Black Mamba Autoflowering from PEV Seeds has all the qualities you would expect from an autoflowering plant. Speed, resistance, power, production and great taste

Features
Type: Autoflowering
Bank: PEV Seeds
Genetics:Tangie Dream x Skunk x Rudelaris
Phenotype:Hybrid Indica 60% / Sativa 40%
Indoor production:600 gr/m2
Outdoor production: 110 g/plant
Growing cycle: 70-80 days
THC:17-23% CBD: 0,05-0,10%

How to make an autoflowering variety faster?

The ideal is not to force the plants during cultivation, but if you need to have weed as soon as possible there are some tricks you can use. However, you have to understand that a large harvest cannot be achieved in a short time, so you have to sacrifice production if you want to save time in growing.

One way to speed up the pace of cultivation is to plant the autoflowering seed in a small pot. When the roots realize that they do not have enough substrate they anticipate their flowering in order to be able to finish the cycle with the available nutrients.

If you want to be able to harvest a little earlier for some reason, you also have products like GHE’s Ripen, which speeds up ripening by a few days in both auto and regular cannabis varieties.

⚠️ Conclusion

The fastest autoflowering cannabis plants are not the most interesting, except if for some reason you need to speed up cultivation. Nowadays there are automatic strains that need 1 or 2 more weeks of cycle, but they compensate with much more production, so they are much more profitable. Do you know any autoflowering seeds faster than those mentioned in this post? Please tell us, and help share it.

Top 10 Fastest Autoflowers Of 2021

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! Why wait around for a strain that takes forever to cultivate, only to be disappointed by measly returns come harvest? There are many reasons autoflowering seeds are fast becoming the most popular choice among home growers of all experience levels.

Automatically progressing from veg into bloom, these plants call for simple lighting requirements, less fertiliser, and slightly less maintenance than photoperiod feminized cannabis. Couple this with their robust and resilient ruderalis genetics, and you’ve got the makings of some easy-to-manage plants. Typically, autoflowering plants are also smaller in stature, making them perfect for discreet indoor and outdoor operations.

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. Sticky Beast Automatic (Zamnesia Seeds)

The result of a dazzling cannabis threesome in the form of Bubble Gum x OG Kush x Critical Automatic, Sticky Beast Automatic is first on our list of fast-growing autoflowers. From start to finish, she’ll take just 7–8 weeks to deliver a satisfying harvest. Reaching heights of 40–80cm indoors and 60–100cm outdoors, she offers discretion, and isn’t overbearing in the slightest. At the end of her rapid growing cycle, you can expect returns in the region of 350–400g/m² indoors and 150–200g/plant outdoors.

Having scooped up 1st prize at the 2018 Highlife Cup, you know you’re in great hands with this sweet and earthy delight. She provides a long-lasting high that harnesses the relaxing prowess of her parents, and will have you chilled out in no time at all. You can thank her 18% THC content and predominantly indica genetics for this soothing effect.

2. Quick One (Royal Queen Seeds)

Ready to harvest in 8 weeks, there’s little wonder why Quick One is included on our list. Reliable and robust, this strain was formed by crossing Lowryder 1 with Old School Indica. Sure, she’s short in stature, but that only means you can fit more plants into your growing area! Reaching heights of 50–60cm indoors and 60–100cm outdoors, she’s unlikely to overstay her welcome. Indoor plants will return a respectable 275–325g/m², while outdoor plants are capable of churning out a satisfying 100–150g/plant.

With her indica genetics, diverse terpene profile, and 13% THC content, she provides a high that is physically relaxing but not couch-locking. Earthy, citrus, and fruity aromas dominate the sensory experience, and make for a smoke you’ll return to again and again. An easygoing smoke or vape suitable for any time of day.

3. +Speed Auto (Sweet Seeds)

Now we’re picking up some serious speed! Ready in just 49 days, +Speed Auto from Sweet Seeds is a fast-finishing strain that has plenty to say for herself. With ideal parentage in the form of Auto Critical Mass x Speed Devil 2, she’ll grow to around 90cm in height, but is still ideal for a clandestine indoor growing project. Once ready to yield, you’ll see some respectable numbers of up to 150–200g/m² indoors and 30–150g/plant outdoors.

+Speed Auto is a balanced indica/sativa hybrid that leans on her genetics to provide thick buds reeking with notes of sweet fruits coupled with cheese. With a high that is stimulating and promotes creativity, there’s no wonder die-hard cannabis enthusiasts seek out this strain. You can enjoy her as a casual smoke whenever you need a little pick-me-up. And, given her extreme speed, you can enjoy multiple harvests of +Speed Auto buds in one growing season!

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4. Purple Punch Auto (Barney’s Farm)

Purple Punch Auto is another quick one, taking around 8–9 weeks before she’s ready to yield. But, let us tell you; if she does need that extra 9th week, it will truly be worth the wait as she blossoms into a fully formed force to be reckoned with. Purple Punch Auto will reach heights of around 80cm on average. She’s a compact plant that will pleasantly surprise any grower, especially when it comes to her yields. Anticipate returns of around 400g/m² indoors and a similar amount per plant outdoors.

This high-performing strain boasts a medium-high THC content and a plethora of terpenes—earthy, skunky, lemon, and fruity notes all make their mark. These phytochemicals combine to catalyse a perfectly potent, relaxing high that is neither overwhelming nor insufficient. A good post-work smoke to chill out, without getting too sleepy.

5. Caramel Automatic (Zamnesia Seeds)

This is one strain that is a real “blink, and you’ll miss it” experience. Taking just about 8 weeks to mature, Caramel Automatic derives from Sweet Caramel x ruderalis, but is a true indica-dominant character in her own right. After her short growing cycle, you can expect to see returns of around 400–450g/m². A simply huge yield for a plant that stands not much taller than 100cm.

She’s an all around super strain topped off with a strong, body-melting high—sure to put a smile on the face of even the most pretentious smoker. Not only will you enjoy her THC content of 14%, but also her medium CBD content of 3%. With some sweet, syrupy caramel flavours, her name is no happy accident. This plant will surely take pride of place in a lot of grow rooms.

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. Watermelon Automatic (Royal Queen Seeds)

This indica-dominant strain is ready to harvest in next to no time, or 6–7 weeks, to be precise! She’s derived from two big-hitter strains: Tropicanna Cookies x Lemon OG. Watermelon Automatic brings all of the finer aspects of her parentage into one neat package. She grows to 80–110cm indoors and 100–120cm out, but, with a little LST, you can keep her more grounded if you so prefer. Once ready to harvest, you can expect to see some pretty sizeable yields of up to 500g/m² indoors and around 100g/plant outdoors.

Once harvested, she uses her flavourful genetics to provide mouth-watering tastiness. With sweet fruits and an underlying watermelon fragrance, she’s moreish to all. Thanks to a hard-hitting but relaxing high fuelled by a THC level of around 20%, she can be enjoyed at any time of day for a little hit of bliss.

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.

Can You Speed Up Autoflowers Even More?

Even though some of the previous strains will reach harvest in a flash, the question of whether it’s possible to speed them up more is still top of mind for many.

However, the main reason behind autoflowering strains’ fast and resilient growth is their ruderalis genetics. Ruderalis plants adapted to flourish in even the most desolate or seemingly barren of places. It is this that fuels the autoflowering plant’s unique nature.

Of course, with photoperiod plants, it is entirely possible to speed up the process by changing the light cycle or blacking out sunlight to force the plant into its next stage of development. However, autoflowers are almost impossible to manipulate in this fashion, as they do not rely on a change in light schedule to progress through their life cycle.

There are some anecdotal reports stating that the use of hydroponics and CO₂ supplementation can potentially enhance the development of autoflowering strains, and therefore reduce the overall length of the growing cycle. This is likely to only really be a matter of days, if anything, so it might not be worth the investment for results that are less than ideal.

Besides, if we’re only talking a matter of 6–8 weeks on average for some of the more popular autoflowering strains, that little extra time will only serve to reward you when harvest comes around. What a day that will be.