Whether you’re tight on time, working within a short growing season, or just prefer the efficiency of a speedy harvest, autoflowering cannabis seeds offer a smart solution. Yet, even among autos, some strains are noticeably quicker than others. The following 11 strains—available at Pacific Seed Bank—are among the fastest-flowering autos available today.
Each has been hand-picked for its efficiency, yes, but also for its unique qualities, including level of potency, ease of growth, and resilience. These aren’t just fast autos; they’re fast and worth your time.
A Quick Rundown on Autos and Why They Flower Faster
In the cannabis world, strains are typically categorized as photoperiod or autoflowering. “Photoperiod” means light plus time, indicating the plant requires a specific change in lighting to begin flowering. “Autoflowering” means self plus flower, meaning autos flower on their own after a fixed period of time, regardless of what’s happening with the light.
While autoflowering strains do have a nimble and quick flowering phase, some growers may be surprised to know that it’s actually their shortened vegetative stage that makes them notably speedy. As such, autos are considered a more efficient play if you’re seeking yields sooner.
Amnesia Haze Auto Seeds
Surprisingly easy to grow, even for an auto, our Amnesia Haze strain is a great first hybrid, especially for growers looking to dip a toe into more energetic effects. This 70% sativa strain takes a mere eight weeks to go from flowering to harvest, all without sacrificing potency.
While many auto strains have a flowering time of just 45-55 days, sativa-rich autos tend to grow a bit more slowly than indica-dominant ones. As such, this auto is uniquely speedy given its lineage. And while some fast autos trade flavor for turnaround time, Amnesia Haze Auto doesn’t make sacrifices. This hybrid offers earthy citrus notes, a strong cerebral high, and a generous helping of euphoria, just for good measure.
Northern Lights Auto Seeds
A legend for good reason, the Northern Lights strain is a nostalgic strain with modern-day relevance. Known for charming old-school fans and newbie growers alike, its tenure of nearly forty years speaks for itself.
This deeply relaxing strain is remarkably easy to grow, tending to forgive newbie mistakes like overwatering, underfeeding, and similar issues.
Our auto version is short, stocky, potent, and pulls no punches: With thoughtful care, your plants will typically be harvest-ready in as few as 45-55 days. You’ll be greeted with notes of pine and sweetness, and a moderate hit of THC, making this classic nightcap strain as lulling as the Northern Lights themselves.
LowRyder Auto Seeds
Lowryder Auto is often credited with launching the autoflower revolution. But it does much more than rest on its impressive lore. Its total life cycle clocks in at roughly eight weeks from seed to harvest, which remains impressively fast even by today’s standards. The secret to Lowryder’s speed lies in its ultra-short flowering phase, typically lasting approximately 35-45 days. This is notably fast, even in comparison to modern auto strains.
Critical Jack Auto Seeds
Critical Jack Auto blends Critical Plus and Jack Herer genetics into a well-rounded, rapid-growing hybrid. While its flowering time of 50-60 days is quick, it also has an impressively prompt vegetative stage of just three weeks.
With spicy citrus flavors, 20% THC, and an upbeat, creative buzz, this one punches above its weight class in both speed and experience. Its 60:40 sativa-to-indica ratio means it’s more vibrant than mellow, but like any good hybrid, this strain merges the best of both worlds.
Cheese Auto Seeds
Cheese fans rejoice: You can have your gorgonzola and eat it too with this flavor-packed, efficient strain. Unlike some of the other autos mentioned on this list, The Cheese Auto strain doesn’t have a much faster flowering time than its photoperiod counterpart, but still beats the clock in record time thanks to its brief vegetative stage.
But, as with the other strains on this list, speed isn’t everything. This strain is also beloved for its signature, funky aroma, indica-rich effects, and savory taste.
AK-47 Auto Seeds
Despite its name, AK-47 Auto is far from aggressive. It strikes a balance between uplifting and calming effects, thanks to its 60:25:10 sativa-to-indica-to-ruderalis ratio, making it a versatile choice.
With a flowering time of roughly 50 to 63 days, it achieves speed partly through a notably short vegetative phase. Its earthy, floral aroma complements a smooth, motivating high, and its tolerance for less-than-ideal conditions makes it a dependable option for newer growers.
White Widow Auto Seeds
White Widow Auto captures the essence of the original’s famed resin production and perfectly balanced euphoria, all while shortening the flowering phase to roughly 45-55 days
This vintage strain’s buds are dense and frosty, carrying the familiar pine and earthy aromas that fans love. Thanks to its consistent performance and ease of cultivation, it appeals equally to medical users and recreational growers seeking dependable potency without a lengthy wait.
Blueberry Auto Seeds
Known for its sweet, fruity fragrance, mid-range levels of THC, and deeply calming effects, Blueberry Auto lands on our list thanks to its impressively quick flowering time of just 45-55 days.
Cannabis growers also appreciate this strain for its compact size. Well-suited to smaller spaces, its low-maintenance in more ways than one. A excellent starter strain for berry-lovers, Blueberry Auto also boasts an 80% indica lineage, serving up high that is even more chill than the growing process.
Blue Cookies Auto
This indica powerhouse has resin-coated buds and a rich, dessert-like flavor. Its flowering time of about 40-50 days is swift, especially for a strain carrying this level of potency. While it demands a bit more attention than some autos, its complex effects and high THC content of up to 23% reward growers willing to invest the care. As such, Blue Cookies Auto seeds are an excellent option for those ready to elevate their cultivation, all without sacrificing speed.
Blue Dream Auto
True to its name, the Blue Dream Auto strain offers a harmonious blend of uplifting cerebral energy and gentle body relaxation. A sativa-leaning hybrid, it’s known for a sweet berry and floral aroma, and its quick finish—typically about eight weeks from seed to harvest—makes it a favorite among novices and experienced growers alike. Reliable growth and well-rounded effects combine for a satisfying, no-fuss harvest.
Rapid Results, Real Rewards: Your Quick-Grow Adventure Awaits
Autoflowering strains naturally thrive on speed, but the 11 featured here go beyond, pairing brisk growth with distinct effects, rich flavors, and dependable performance. Whether it’s their notably short life cycles, ease of cultivation, or unique profiles, each brings its own special appeal. For beginners, these seeds make growing approachable and rewarding. Seasoned cultivators can easily fit in an extra harvest or experiment with new techniques. Fast doesn’t have to mean generic—these autos stand as proof.
