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fast growing weed seeds indoor

Fast growing weed seeds indoor
Buy Hash Plant Regular Seeds?

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.

Table of Contents:

Fastest Flowering Autoflower Strains

Sour Crack Auto

Overview: THE FASTEST autoflowering strain that Mephisto Genetics has ever grown, Sour Crack finishes up at 7 weeks from seed (germination). Sour Crack is made from Auto Green Crack and 24 Carat genetics. The short plants (50-70cm) grow rock hard resinous buds quick, with a high potency tested near 20% THC. Great for commercial quality Sea of Green autoflower grows.

Grow Time 7 Weeks from Seed
Strain Breeder Mephisto Genetics
Seed Sex Feminized
Yield Indoors: 30-60g/plant; Outdoors: 60g+/plant

Buy Sour Crack Auto Feminized Seeds?

+ Speed Auto

Overview: + Speed Auto by Sweet Seeds is one of the quickest finishing autoflower strains to grow, being ready to harvest in only 7 weeks from seed. Speed+ is comprised of the breeder’s own Critical Mass and the Speed Devil #2 Auto genetics, bred for yield and deep aromatic properties. Grows well both indoors and outdoors, the plants grow to about 50-90cm in height producing up to 150 grams per plant. Tastes sweet, fruity, cheesy.

Grow Time 7 Weeks from Seed
Strain Breeder Sweet Seeds
Seed Sex Feminized
Yield Indoors: 350-500 g/m2; Outdoors: 30-150g/plant

Buy + Speed Auto Feminized Seeds?

Green-O-Matic Auto

Overview: In just 55-60 days from germination, Green-O-Matic Auto by Greenhouse Seed Co. is ready to harvest. Green-O-Matic Auto is an 80% indica 10% sativa 10% ruderalis hybrid autoflowering strain developed from Moroccan, White Dwarf, Lowryder and further ruderalis genetics. Green-O-Matic Auto plants are short in stature at only 30-40cm tall, but can yield as much as 800 g/m2 in an optimized SoG setup. Easy to grow, sweet smoke and decent, over 15% THC content.

Grow Time 55-60 Days from Seed
Strain Breeder Greenhouse Seed Co.
Seed Sex Feminized
Yield Indoors: 800 g/m2; Outdoors: 30 g/plant

Buy Green-O-Matic Auto Feminized Seeds?

Stardust Auto

Overview: Stardust Auto, named for the thick coating of sparkling white crystals, is a compact sativa-dominant autoflowering strain that finishes fully mature in 55-65 days from seed. The short plants grow 40-60cm tall, made of 55% sativa 30% indica and 15% ruderalis genetics, easy to grow indoors, outdoors or greenhouse. The breeder Stitch says Stardust is his favorite white strain for sleep. Skunky, berry flavors. THC 17%.

Grow Time 55-65 Days from Seed
Strain Breeder Flash Seeds
Seed Sex Reg / Fem
Yield 25-45g/plant

Buy Stardust Auto Reg / Fem Seeds?

Alaskan Purple Auto

Overview: A 90% indica strain producing nice yields, Alaskan Purple Auto by Seedsman finishes in 8 weeks from seed with some phenotypes ready to harvest at week 7. Alaskan Purple Auto is an easy growing, sizeable plant for an autoflowering strain and will finish one week later when grown outdoors. Ripe, fruity sweet flavors and 15-20% THC content.

Grow Time 8 Weeks from Seed
Strain Breeder Seedsman Seeds
Seed Sex Feminized
Yield Indoors: 400-550g/m2; Outdoors: 40-200g/plant

Buy Alaskan Purple Auto Feminized Seeds?

Californian Snow Auto

Overview: A sativa-indica cross of American Old School Hot California strain and a Canadian Ruderalis plant, Californian Snow Auto by FastBuds Seeds is a fast grower being ready to harvest in just over 60 days from start-to-finish. The plant grows more sativa-dominant, reaching 80-130cm tall. Californian Snow Auto buds form into frosty dense nuggets that reek of citrus. 19% THC.

Grow Time 8 Weeks from Seed
Strain Breeder FastBuds Seeds
Seed Sex Feminized
Yield Indoors: 400-550g/m2; Outdoors: 50-250 g/plant

Buy Californian Snow Auto Feminized Seeds?

Kush Van Stitch Auto

Overview: Fast, strong and distinctly indica, Kush Van Stitch Autoflowering was created using OG Kush and Lowryder #2 genetics. Kush Van Stitch are stout, vigorous plants growing near 50cm indoors and 80cm outdoors. Total grow time from seed to harvest is a quick 60-65 days. Very kushy, hash flavored buds with 19% THC content.

Time 60 Days from Seed
Strain Breeder Flash Seeds
Seed Sex Reg / Fem
Yield Indoors: 25g/plant; Outdoors: 100g/plant

Buy Kush Van Stitch Reg / Fem Seeds?

Chocolate Skunk Auto

Overview: 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 at over 100cm tall and produce beautiful compact, crystal covered buds that smell great. 17% THC.

Grow Time 60 Days from Seed
Strain Breeder 00 Seeds
Seed Sex Feminized
Yield Indoors: 250-350 g/m2

Buy Chocolate Skunk Auto Feminized Seeds?

Chronic Ryder Auto

Overview: The well-known strain Chronic has been bred into a quick autoflowering plant, Chronic Ryder Auto by Seedsman. A vigorous auto strain that produces hearty yields of big fat buds, Chronic Ryder Auto was developed by The Joint Doctor, who is responsible for releasing the 1st marketed autoflowering seeds, Original Lowryder. He has been working on autoflowering genetics longer than any other breeder and continues to release his seeds through Seedsman.

Grow Time 65 Days from Seed
Strain Breeder Seedsman
Seed Sex Feminized
Yield High

Buy Chronic Ryder Auto Feminized Seeds?

Purple Mazar Auto

Overview: Purple Mazar is an fast flowering mostly indica autoflowering strain bred by Flash Seeds breeder Stitch. Puple Mazar contains the genetics of a purple Mazar-I-Sharif crossed with ruderalis. The plants grow in all environments 40-100cm tall finishing around 55-70 days from seed. Exotic, fruity buds with a high 19% THC content. Purple bud colors come out during low night temperatures.

Grow Time 55-70 Days from Seed
Strain Breeder Flash seeds
Seed Sex Reg / Fem
Yield 30-80 g/plant

Buy Purple Mazar Auto Reg / Fem Seeds?

Fastest Flowering Photoperiod Strains


Overview: Gigabud is a Big Bud and Northern Lights hybrid that finishes flowering in a speedy 5-6 weeks. A thirsty, vigorous strain in veg and flower, Gigabud is a medium-sized plant with indica genetics. Massive production of resinous, fruity buds. There is also an autoflowering Gigabud strain for sale.

Flowering Time 5-6 Weeks
Strain Breeder G13 Labs
Seed Sex Feminized
Yield 450 g/m2+

Buy Gigabud Feminized Seeds?

Hash Plant

Overview: The famous Sensi Seeds Hash Plant indica comes from Afghani genetics bred in the northwest United States and then brought to Sensi Seeds in Holland where it was crossed with Northern Lights, another Afghan variety. Ready to harvest in as short as 40 days from flowering, Hash Plant seeds grow quick, in their stout, thick appearence. The buds are super dense, very sticky and hashy. A good choice for breeders.

Flowering Time 40-45 Days
Strain Breeder Sensi Seeds
Seed Sex Regular
Yield 400-500 g/m2

Buy Hash Plant Regular Seeds?

Green Poison FAST Version

Overview: A top quality weed strain that gets super frosty and tight, Green Poison FAST Version by Sweet Seeds 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 form up very dank heavy, fruity buds.

Flowering Time 6 Weeks
Strain Breeder Sweet Seeds
Seed Sex Feminized
Yield Indoors: 500-600 g/m2; Outdoors: 500-700 g/plant

Buy Green Poison FAST Version Feminized Seeds?

Passion #1

Overview: Passion #1 started as an outdoor indica strain from California in the 1970s, and made it over to Holland in the 1980s. A stable regular seed strain that is easy to grow. Passion #1 can get huge outdoors and indoors finishes the flowering cycle in a mere 6 weeks time. The citrus-like buds are long, dense and full of resin. 18.6% THC content.

Flowering Time 6 Weeks
Strain Breeder Dutch Passion
Seed Sex Regular
Yield 250-750 g/plant

Buy Passion #1 Regular Seeds?

Quick Critical+

Overview: The latest fast flowering strain from Dinafem, Quick Critical + is a 75% indica 25% sativa with a super quick floewring time. Thanks to a reversed female clone of Critical+ 2.0 Auto crossed with a Critical + clone, this new hybrid finishes 7-14 days quicker than the original Critical +. Easy to grow high yielding skunky lemon weed. THC content is 16-20%.

Flowering Time 42-49 Days
Strain Breeder Dinafem Seeds
Seed Sex Feminized
Yield Indoors: 600 g/m2; Outdoors: 1250 g/plant

Buy Quick Critical+ Feminized Seeds?

Big Nugs Fast

Overview: As the name suggests, Big Nugs Fast grows big nugs, fast. This photoperiod hybrid is ready to harvest in a mere 6-7 weeks flowering time. Bred from Big Bud / Critical Mass (Afghani x Skunk) crossed with Seedsman’s fast finishing male plants pollen. Similar to Big Bud, Big Nugs Fast forms thick heavy buds which may need to be propped up during flowering. Yields are high, expect pinecone shaped dense buds with fruity, hashy tones.

Flowering Time 6-7 Weeks
Strain Breeder Seedsman Seeds
Seed Sex Feminized
Yield 450-550 g/m2

Buy Big Nugs Fast Feminized Seeds?

White Critical Express

Overview: A very fast flowering strain ready in max 49 days flower, White Critical Express is a cross of White Widow x Critical Mass with Kalashnikov Seeds’ secret hybrid. Easy to grow and train the buds to milk a high yield. White Critical Express produces highly potent widowy buds over 21% THC.

Flowering Time 42-49 Days
Strain Breeder Kalashnikov Seeds
Seed Sex Feminized
Yield 500 g/m2

Buy White Critical Express Feminized Seeds?

Pineapple Express #2

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

Flowering Time 45-50 Days
Strain Breeder G13 Labs
Seed Sex Feminized
Yield Indoors: 700g/m2; Outdoors: 900-1300g/m2

Buy Pineapple Express #2 Feminized Seeds?

C99 x Blueberry Fast

Overview: A quick flowering sativa-dominant hybrid cannabis strain, ready to harvest in just 45 days from start of flowering cycle. The infamous C99 strain is crossed with Blueberry and then bred with Seedsman’s fast parent to make C99 x Blueberry Fast, a sativa-dominant quick-finishing strain. The Thai genetics present make this strain get big during flowering, so expect a little stretch. Yields of thick, high-THC buds are high.

Flowering Time 6-7 Weeks
Strain Breeder Seedsman Seeds
Seed Sex Feminized
Yield 350-450 g/m2

Buy C99 x Blueberry Fast Feminized Seeds?

Pakistan Valley

Overview: Originating from the Hindu Kush mountains, Pakistan Valley is a landrace pure indica cannabis strain that grows quick, finishing it’s flowering phase in just 45-55 days. A vigorous grower, especially suited towards dry climates where the buds can bulk up dense and resinous. Thick, compact, super sticky, and the THC content can exceed 20%. Available in both regular and feminized seeds.

Flowering Time 45-55 Days
Strain Breeder World of Seeds
Seed Sex Reg / Fem
Yield Indoors: 400g/m2; Outdoors: 700g/m2

Buy Pakistan Valley Reg / Fem Seeds?

Disclaimer: Know your laws. Read federal and local/county laws before buying seeds online. We do not promote or undertake in illegal activities.

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

Fast growing weed seeds indoor
All of the strains that we’re about to talk about are without a doubt our personal indoor favorites and they’re well worth your time if you decide to grow them.

The 5 Best Seeds for Grow Tents

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In this article we’re going to talk about the 5 best seeds for grow tents; a selection of both seasonal and autoflowering strains that are perfect for any kind of grow tent for indoor grows. These five seeds are our personal top five picks after years of experience, and we guarantee that you will love each and every one of them if you decide to plant them for your indoor grow.

There are so many different kinds of cannabis seeds; some prefer warmer or colder climates as well as some specific grow conditions and parameters. Today we’re going to talk about the 5 best seeds for grow tents, and each of these seeds is perfect even if you don’t have much experience growing as each strain specifically likes growing indoors. You won’t run the risk of them growing too tall and reaching the lamp or having a low heat resistance.

All of the strains that we’re about to talk about are without a doubt our personal indoor favorites and they’re well worth your time if you decide to grow them.

The 5 Best Seeds for Grow Tents:

Power Plant by Dutch Passion:

In 2004 I planted this strain after a friend who had recently been to Holland told me that the only strain that really got to him was Power Plant. Once he told me this I didn’t take long to get my hands on some feminized Power Plant seeds and I swiftly placed them in my Grow Tent. Power Plant is supposedly Sativa but it acts more like an indica plant when it comes to size and structure, as well as having a relatively short flowering period that takes just 9 weeks. The curious thing about this plant is that as it grew more and more and the buds got fatter, the little “hairs” (pistils) liked like they had been shaved down, much shorter than other strains. The color of the plant was a radioactive green color and its trunk and branches were ridiculously strong. This strain really doesn’t grow too tall as it likes to stay nice and compact, so you can easily fit around 9 plants in a square meter space under a 600w grow lamp. It had an extremely strong aroma, one of those weeds that you just can’t leave the house with or everyone will know that you’re carrying. It had a lovely citrus and lemony flavor to it, and when smoked the taste can linger in the mouth for quite a while. It grew dense and heavy buds, similar to chicken eggs in size, and compared to a Super Silver Haze that was growing right beside it, I managed to get double the yield from the Power Plant. After a while I planted this strain again and it grew exactly the same; bright, radioactive green color, thick trunks and branches and some amazingly potent and aromatic buds. All I fed the plants with was Bio Vega, Bio Flores and Bat Guano. To get the same results you’ll need to have it on growth for 20 days and then flip the lights to the flowering period; grow it in a 3L pot and transplant it to a 7L pot a week after switching the light period. With some simple fertilizers and minimal care you’ll get an amazing indoor yield.

Tutankhamon by Pyramid Seeds:

This is another relatively early Sativa that should be ready around 2 months after switching the light period. This is quite a compact plant, and you can tell after just 15 days of growth. It grows out many side branches that practically reach the top of the plant, which doesn’t grow too tall. This plant is the product of a mix of Ak-47s making for some long, thick and heavy buds. When growing the branches do stretch up, but once the plant begins flowering then the branches will lower and open up some more due to the weight of the buds, allowing the light to reach every last inch of the plant. This of course means that you can only plant 4 plants per square meter under a 600w grow light. I managed to get 87g from one plant in a 7L pot, which you can see in the picture to the left. It’s extremely pleasing to smoke, with some spiced hints accompanying the hard and heavy buds. Whenever I recommend this strain to anyone they thank me, saying that if I had never told them about it they never would have even known that this strain existed. This is why I recommend it, so that you know that it’s a plant that will give you the most it possibly can in indoor grows and you don’t need to have much experience to grow it properly! This strain loves light, and you’ll soon understand why you should only plant 4 per square meter as they start off small but sprout outwards when flowering. You’ll need to grow them for around 21 days and begin flowering them with your normal routine; grow them in 3L flowerpots and switch them to the flowering period on day 21. 7 days after changing the light period, transplant them to 7L flowerpots and then it should take around 60 days to finish its cycle. You’ll be surprised by the results.

Melon Gum by Dr. Underground:

This is another short strain, which is exactly the kind of strain you should be growing indoors. This plant has the biggest leaves I’ve ever seen on a strain I’ve planted myself; its leaves grow gigantic, facing the light to get the most possible and its branches grow quite close to the trunk and when flowering they don’t tend to grow that much more, so you can easily fit 9 plants in a square meter area. The only bad thing about this baby is that it takes a while to grow before you can set it to flower, but once it begins flowering it finishes swiftly making up for that extra grow time; around 7 weeks after seeing the first buds you should have a nice harvestable plant. Another eye-catching thing about this strain is the amount of resin that it produces right from the moment the plants begin flowering, and once they’re done the buds will look completely crystallized with resin, smelling like candy. If you’ve ever tried the typical watermelon chewing gum then you know the exact kind of smell we’re talking about. When smoked is earthy like Skunk but with some very sweet hints to it, making it irresistible for many cannabis smokers. This is another strain that you won’t be able to take anywhere with you due to how strong it smells. This is the strain that I’ve grown the most in my indoor set up as I love it for its amazing sweet flavor. It’s extremely easy to take care of as it feeds quite nicely and grows nice and strong, making it hard to make any actual mistakes.

Haze Auto by Dinafem:

This strain is autoflowering and it takes just 2 months to finish its cycle after being germinated at 20/4. You can fit 9-16 plants in a square meter; if you’re using a grow tent plant 9, but if you’re using a grow room you can easily plant 16. They have an average yield of around 35-40g per plant in 7L pots; there’s no need to use bigger pots. The best way to get these plants to develop correctly is by following the steps in our article about how to plant autoflowering seeds. You’ll end up with maximum quality weed with some hard buds that smell of incense and taste nice and sweet, like the purest Haze. It ends up completely covered in resin, and even the most confident and experienced smokers won’t be able to tell that it’s an autoflowering strain when smoked. It will reach around 70cm and it grows into one central bud stem and around 8 branches that grow a lot of yield on the tips, although the rest of the branches are quite bare. If possible you can use a stake or some other training method so that the main stem doesn’t end up bending over under the weight of the buds; if you feed this plant properly it will get quite heavy and you might even have to string up the branches so that they don’t break. Our favorite thing about this plant is how fast it grows without decreasing quality. It’s rather easy to grow; germinate in 7x7x9cm pots and once they’re out for around 5 or 6 days, transplant them to a 7L flowerpot and grow it in that pot until the end of its cycle. With a decent fertilizing plan you should be able to get the most out of it and get a yield worthy of feminized seasonal plants, making it perfect for those who are in a rush to get their yield and begin smoking it.

Sweet Skunk Auto by Sweet Seeds

This autoflowering strain loves growing indoors, making for balanced plants with enormous buds on each and every tip of the branches that end up covered in tasty resin. The branches open up quite a lot to let the light reach the bottom, and with about 9 plants per square meter you’ll have a perfectly balanced plants/time/yield proportion. You’ll need to follow the autoflowering grow steps to get the most out of this strain; if you don’t treat them properly, like with any other plant, you’ll end up with dwarfed plants. If you follow the steps properly you’ll end up with some auto buds that are honestly the best and highest quality autoflowering buds that I have ever smoked. It has an earthy, strong Skunk flavor. When smoked you’ll be rewarded with an instant relaxing state. This strain is perfect for those who think that autoflowering weed doesn’t have any effect. It won’t take any longer than 2 months on 20/4 light, and sometimes you might think that it’s ready for harvest at just 45 days but if you harvest any earlier than 60 days you’ll be making a big mistake, and maybe even a bit more. You should get around 40g per plant, with some extremely resinous buds; even the biggest leaves will be covered in resin which is perfect for maximum quality extracts. This is another strain that you won’t regret growing indoors. It’s also one that I recommend quite a lot, as the seeds are cheap but top quality for smokers and it’s quite a fast harvest period. It’s perfect for those that consume a lot of cannabis and need fast strains to keep up with their intake.

There you have it, a simple guide on the 5 best seeds for grow tents. I hope our valuable experience has been of help; now you can grow a strain that you know will adapt perfectly to your indoor parameters, avoiding the song and dance that is finding a strain that fits your needs. These strains grow compact, feed nicely and are extremely hard to stress out, so you can’t go wrong! Happy growing!