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The Top 5 Fastest Growing Autoflower Strains

Need seeds that give you buds fast? We've got you covered with our list of the fastest growing autoflowering marijuana strains.
13 May 2021
4 min read
The Top 5 Fastest Growing Autoflower Strains

  • 1. Mimosa cake auto
  • 2. Kosher cake auto
  • 3. Lsd-25 auto
  • 4. Blackberry auto
  • 5. Fastberry auto
  • 6. In conclusion

One of the largest reasons growers choose autoflowers is how fast they can mature from seed to chop. Autoflower seeds like Fast Buds' are ready in 8-10 weeks, meaning you can harvest twice or even three times in the time it would take you to grow a photoperiodic plant.

Below, we break down the fastest growing autoflower strains from Fast Buds. If speed is what you're after, you'll find it here. Don't forget to check out our guide detailing when is the best time to harvest autoflowering cannabis.

1. Mimosa Cake Auto


Mimosa Cake Auto
4 out of 5
When I grow autoflowers I prefer to harvest them after about 70 days but this one took 12 weeks. Otherwise I enjoyed growing it.
Verified customer
Reviewed 31 July

One of the best Sativa-dominant strains on our list, Mimosa Cake kicks like a mule and is perfect for an active day out in the sun. It's a sizeable yielder as well, being one of the most popular strains in California at the moment and amongst our highest yielding strains. Mimosa Cake usually hits full maturity around week eight or nine, offering up a lemony and floral bouquet of buds coated in resin.


The top 5 fastest autos: mimosa cake auto

Mimosa Cake Auto.

When grown under the right conditions, this plant will boast beautiful purple colors on the buds and surrounding foliage, and thanks to the 24% THC, produce large-sized buds with lots and lots of resin, perfect for extractors and hash makers.

2. Kosher Cake Auto

Kosher Cake Auto
5 out of 5
It does what it says on the tin ,after slow start this plant just took over ,very nice aroma and perfect smoke just ideal for wake&bake
Sunshinegroww .
Verified customer
Reviewed 10 September 2021

One of Fast Buds' latest releases with a delicious lemony cake taste, Kosher Cake. With THC levels reaching 25% and CBD levels lower than 1%, this one-of-a-kind strain offers an experience like no other. The high THC levels provide a giddy euphoria and unreal relaxation without a couch-lock effect for those who don’t want to experience a narcotic type of effect. 


The top 5 fastest autos: kosher cake auto

Kosher Cake Auto.

This strain's short growing time pairs well with its tall yet compact build, making it perfect for indoor growers. This unique variety matures around week eight or nine and is perfect for when you're looking for something different and with a unique terpene profile.

3. LSD-25 Auto

LSD25 Auto
4 out of 5
I think my mistake was to decide not to train her. She was basically one fat cola and very short side branches with small buds.
Verified customer
Reviewed 21 October

The crown jewel of the Fast Buds library, LSD-25's purple flowers have to be seen to be believed. This dense Indica expresses a royal violet color that blows us away every time. Its diesel odor comes from a complex variety of terpenes that give this Indica the trippy effects for which it's named.


The top 5 fastest autos: lsd-25 auto

LSD-25 Auto.

LSD-25 reaches full maturity in eight to nine weeks and will blow away your smoking buddies not just with its effects, but its beautiful color as well. Thanks to its top-of-the-line genetics, the effect will take you to the moon and leave you there, this strain offers a powerful head high that may overwhelm new consumers so make sure you take it easy!

4. Blackberry Auto

Blackberry Auto
5 out of 5
Grew blackberry in my past 3 runs, love the Fruity berry smell and taste. Everything I grew it always comes out purple buds.
Verified customer
Reviewed 9 July 2021

Simply called Blackberry, Fast Buds Autoflower Blackberry Kush, grows large purple buds so dark they almost appear black. Its hybrid effects offer a brief window of focus, followed by mellow relaxation. Blackberry typically reaches full maturity in eight weeks and is one of our most regular strains regarding grow times.


The top 5 fastest autos: blackberry auto

Blackberry Auto.

You can expect beautiful colors and even better aromas, this strain will surely leave your mouth watering due to the delicious sweet blackberry taste with a strong earthy background that comes hand-in-hand with a strong couch-lock effect, better recommended for nighttime use.

5. Fastberry Auto


We mentioned that our strains typically mature in 8 to 10 weeks, but Fastberry is anything but typical. It's quite rare to encounter a plant from this seed that takes more than eight, and we've even seen a few talented growers chop this strain down in the seventh week. Fastberry is perfect for beginners who want to learn quickly, and experienced growers who want to push a strain to its limit. Its short height also makes it ideal for stealth or indoor cultivators.


The top 5 fastest autos: fastberry auto

Fastberry Auto.

Fastberry is Fast Buds's autoflower take on the classic Cali medical strain, Blueberry. In addition to its ultra-fast grow time, Fastberry feels, tastes, and smells like its photoperiodic parent. If you want a classic, time-tested strain to put you to sleep at night, you won't want to pass up growing Fastberry.

6. In Conclusion

If you are looking for a quick grow cycle without affecting the quality and quantity of the harvest, look no more! These are the fastest strains that take no more than 9 weeks, allowing you to grow top-quality buds in less than 65 days!

If you’ve grown any of these strains before and have some tips and tricks, feel free to help fellow growers, leave a comment in the comment section below!



This post was most recently updated on May 13, 2021.

13 May 2021