The Best Fast-Flowering Cannabis Seeds for Outdoor Growers

By Chris Bond
Published: May 29, 2019 | Last updated: May 11, 2021 06:30:42
Presented by Seed King
Key Takeaways

Outdoor growing can be unpredictable, making fast-flowering a must.

With too many varieties to choose from out there, it can be difficult to sift through all of the options for a fast flowering cannabis seed for your outdoor grow. Fortunately, there are plenty of fast-flowering seeds out there to help outdoor growers hedge against the uncertainty of outdoor conditions. These genetically programmed beauties are the quickest strains available and can finish flowering in as little as seven to eight weeks. But don't worry: faster flowering speeds don't have to mean a lower quality grow. These strains still have high potency, quality and yield; you will just realize these benefits faster! Fast seeds are the answer for growers in northern climates and shorter growing seasons, or for anyone that just wants to get to the finish line a bit faster than their competition.


Northern Lights #5 Fast

This quick-growing version of its namesake flowers a few weeks sooner than the original Northern Lights #5 (NL5). This strain originates from Afghan Indica genetics and as such is a smaller plant that produces highly resinous flowers. It is the perfect choice for those living in areas with early frost dates.

AK-47 Fast

Like the Northern Lights #5, the AK-47 Fast is a strain of the species that has a short grow time of seven weeks to the onset of inflorescence. This strain produces dense, Indica-like buds with high yields, and sweet, earthy tastes.


Sunset Sherbet

Don’t let the lack of the word “fast” in its name deter you. Sunset Sherbet can be flowering as soon as week seven, but definitely by week nine. This particular variety may be better suited for the grower with some experience behind them, but the daring newbie may fare just fine with it as well if starting with feminized seeds. Sunset Sherbet is similar to Girl Scout Cookies and boasts abundant trichomes.

Black Domina

Like Sunset Sherbet, even though the name may not imply it, this strain can flower between weeks seven and nine. Further benefits to this variety are that feminized seeds of this strain are relatively low maintenance plants that are resistant to many pests and diseases that can sometimes affect other cannabis strains. As a further bonus, expect sticky buds with incredible aromas.

Auto-Super Lemon Haze

Shorter than Critical Kush (below), Super Lemon Haze is a strain that grows up to four feet (1.2 meters) tall. A great combination of Sativa, Indica and wild cannabis (ruderalis), Super Lemon Haze will start flowering as early as week three and is harvestable by week nine, making it among the fastest strains around.


Tahoe Kush

Another strain with strong resistance to diseases such as mold and mildew, Tahoe Kush is a THC- dominant strain with levels as high as 20-25%. Outdoor growers can expect yields of this strain of about 10 to 12 ounces (about one-fourth to one-third of a kilogram) of product per plant. Expect flowering at about nine to 10 weeks.


This strain is capable in flowering in as few as eight weeks and like Sunset Sherbet, Chocolope may be better grown by a more experienced grower unless feminized seeds are used. A Sativa selection, Chocolope offers high yields.


Auto-Critical Kush

Autoflowering strains like Auto-Critical Kush and Super Lemon Haze (above) are good choices for growers that may not be fully in tune yet to the cannabis lifecycle. These strains will “automatically” switch from vegetative stage to flowering stage, regardless of light levels. Auto-Critical Kush is a hybrid of wild cannabis strains and will be harvestable for outdoor growers by late summer.


This unique strain, which has a definite blueberry taste and aroma, is among the quicker flowering strains available. It is regarded as one of the most beneficial strains of cannabis in the medicinal marijuana community, and is valued as well for its red, purple and blue hues and large, crystallized buds.

We hope this list included some fast-flowering options to consider for your outdoor grow. You can find more options at Seed King.


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Written by Chris Bond | Certified Permaculture Designer, Nursery Technician, Nursery Professional

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Chris Bond’s research interests are with sustainable agriculture, biological pest control, and alternative growing methods. He is a certified permaculture designer and certified nursery technician in Ohio and a certified nursery professional in New York, where he got his start in growing.

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