Fastest Seed To Harvest Weed

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. Are you trying to grow cannabis in a short period of time? Here's our list of faster flowering strains that take less time to flower! Do you know which are the fastest growing autoflowering plants? In this post you will discover the fastest automatic seeds…

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!

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.

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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.

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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.

6 of the Fastest Flowering Strains You Can Find!

Sometimes you need your weed to grow fast. Perhaps your supply is running low, or maybe your growing location won’t support a lengthy grow. Whatever your reasons, you should start with fast flowering strains and add proven growing methods for the quickest harvest.

This article explains how to grow cannabis the quickest way possible, while also highlighting some of the fastest-growing cannabis strains.

Fastest flowering strains

How Quick Can Cannabis Grow?

There is a lot of variation in how long it will take a given cannabis plant to grow. Luckily, most of the time, the grower will have received this information when they chose a strain and bought it from a seed bank. Still, it’s good to know the basics before jumping in.

Indicas generally grow a little faster and have a higher yield than other strains. They flower in about 8-12 weeks. Sativas have longer flowering times, more like 10-12 weeks total. Their yields are usually smaller, and the plants are taller.

Hybrids can go in many directions, which is mostly determined by their most dominant genes. They often have a combination, such as a shorter vegetative stage and a longer flowering phase.

Lots of factors besides the strain itself, can make a difference. Growers can influence this through their growing techniques as well as where and how they decide to grow their marijuana plants (indoors vs. outdoors, hydroponics vs. other mediums, etc.).

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The Best Fast Flowering Strains to Try

OG Kush

OG Kush Strain

Flowering Period Indoors Flowering Period Outdoors
8 – 9 weeks Early October

The one, the only, the original OG Kush is one of the fastest flowering strains there is. This hybrid strain flowers in roughly 8 weeks, and is easy to grow indoors or outdoors.

You’ll tend to see the best results if you use a hydroponic setup. OG Kush is fairly susceptible to powdery mildew but should be fine as long as you prune it regularly. This is an excellent strain for beginner growers.

Jamaican Dream

Jamaican Dream Strain

Flowering Period Indoors Flowering Period Outdoors
6 to 7 weeks Late September

Jamaican Dream is a delightful little treat that typically flowers after only 45 days, which I don’t need to tell you is quite fast. This strain possesses all of the best qualities of both indica and sativa.

Jamaican Dream also grows equally well both indoors and outdoors. This hardy plant is perfect for new growers because it can withstand things that would destroy other plants.

Critical Kush

Critical Kush Strain

Flowering Period Indoors Flowering Period Outdoors
9 – 10 weeks late September to early October

Critical Kush, an offspring of Critical Mass and the classic OG Kush, is an indica that requires a great deal of room to flourish.

If you decide to grow Critical Kush, then make sure that you’re growing in a large enough area your plants can breathe in! This flowers in only 8 weeks and is one of the fastest flowering strains there is, so you can expect a quick harvest. Critical Kush is one of the fastest flowering strains you can find!

Purple Cheese

Purple Kush Strain

Flowering Period Indoors Flowering Period Outdoors
9 – 11 weeks July and October

This autoflowering indica dominant strain is known for its sweet and fruity aroma, and being generally less cheesy in flavor than other varieties of cheese strains that are out there. Purple Cheese is best when grown in cooler climates (to bring out the purple colors of the flower), growing 50-80 cm.



Flowering Period Indoors Flowering Period Outdoors
65 Days April – September

The sweet and fruity tasting hybrid strain Hobbit is another strain that will bring a quick and relatively large harvest. This isn’t the fastest flowering strain, as it flowers in just over 65 days, but it’s still pretty fast, in my opinion. People love Hobbit for its sweet taste and pungent, earthy aroma.

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White Ryder

White Ryder Strain

Flowering Period Indoors Flowering Period Outdoors
8 to 12 weeks from seed to harvest 8 to 12 weeks from seed to harvest

The indica dominant hybrid White Ryder, was supposed to be similar to White Widow, but by combining the auto-flowering strains, White Dwarf and Lowryder, to make this awesomely potent treat.

This strain flowers in under 80 days, and tends to stay pretty short. This makes it easy to grow on the down low and even hide, should the need arise.

Of course, there are other strains that flower fairly quickly, but if you’re in a real rush, then you can’t go wrong with one of these!

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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…

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…

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

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

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.