Top 11 Strongest Autoflowers: Potency In A Heartbeat

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Strongest autoflower
Author avatar By Derek LaRose
March 01, 2022
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Growing non-photoperiod variants entails a compromise between speed and potency, right? Wrong. The strongest autoflower strains are here to prove that.

Modern marijuana breeding is an industry that never stops giving. Strains that we see today might’ve seemed impossible only a decade ago, but the situation has changed.

Today’s highest-THC autoflower cultivars stand shoulder to shoulder with photoperiods in terms of potency. Join us to explore what made this possible and share our favorite 11 auto strains to smoke in 2022.

Autoflower outdoors
Autoflower outdoors

What is autoflowering weed?

One scroll through the massive Homegrown library, and you’ll learn that the most potent autoflowering strains are no joke. 

These cannabis elites boast considerable THC content. That holds even if their short life cycle would, in theory, render such a feat impossible.

How did that happen? We have ruderalis to thank for all autos, including the most potent autoflower strains. This cannabis family enjoys little fame on its own. When mixed with indica and sativa, it produces amazing results.

What even is ruderalis?

Considered the third branch of marijuana, ruderalis grew naturally in Eastern Europe. The harsh conditions made it compact and resistant to adverse weather, mold, and pests.

Another notable aspect of ruderalis is its non-photoperiod nature. Normally, weed relies on the light schedule to switch from vegetative growth to flowering. The summers are incredibly short in Russia, though, and this family found a way to bypass the issue.

Ruderalis flowers automatically after several weeks of vegging, finishing its entire seed-to-harvest period in under three months. As a result, though, it produces fewer buds, cannabinoids, and terpenes.

How do we get the strongest autoflowers, then?

Well, the 420 industry came to a stunning realization in the ‘80s. When a normal strain of indica or sativa meets ruderalis, magic happens. The offspring strain retains most traits of their potent parent, borrowing some growth patterns from ruderalis.

Autos and potency

The cross between indica or sativa and ruderalis seems like a match made in heaven. A slight issue arose, though.

The shorter lifespan of autos generally leads to reduced cannabinoid production. Their buds are still powerful, but less so.

Despite this drawback, growers continued purchasing, wanting to:

  • Get fresh weed faster
  • Have two harvests per season
  • Grow outdoors in short-summer areas
  • Cultivate in small indoor spaces

Demand generates supply, so breeders continued making auto versions of our favorite strains.

Crossing the strongest photos with ruderalis led to the most potent autoflowering strains on the market today. It took years, but the industry managed to preserve THC production even with changed growth traits.

In a nutshell, autos are less potent might be true, but the difference is diminishing. Today, you can have a rich harvest of strong buds in less than ten weeks from germination. 

Have your cake and eat it, too, thanks to our highest-quality, strongest autoflower seeds.

Top 11 strongest autoflower strains

Below, we’ll share 11 high-THC autoflowers from our library. As a bonus, most have above-average yields, delivering quantity and quality in a smaller package.

1. LSD 

We’re starting strong with LSD, the strongest autoflower for psychedelic action-seekers. This high-yielder promises a kaleidoscopic experience that warrants the evocative name. Worry not, though—it’s all cannabis, only one with some psychoactive properties.

Your senses open as early as the first whiff. The complex bouquet of savory and sweet scents delights connoisseurs and newbies. Close your eyes and pick up each note that makes up this smoke, from skunk to summer citrus.

Take a puff and let your body melt into the cushions. Unabated with any physical discomfort, your mind is free to explore unknown avenues. Your consciousness expands with the new, altered perception of color and sound.

Cultivation is a breezy, fruitful adventure with this specimen of the most potent autoflowers, too. Provide the right conditions to promote THC production and get photoperiod-tier yields in only eight weeks.

TypeIndica-dominant
THC23–25%
FlavorsEarthy, cheesy, apple
EffectsCreative, cerebral, relaxing
Flowering time6–8 weeks
Yield14–22 oz./m² indoors / 3–14 oz.plant outdoors
LSD
LSD

2. Yumbolt

Yumbolt is a rare strain, but its popularity is only rising with the advent of the strongest autoflowers. An almost absolute indica with a sativa twist, this one promises to bring pleasure to every cell of your being.

The enjoyment starts with its perfume. The sweet-and-spicy blend is light on the tongue. It leaves a zesty aftertaste of summer fruits and pepper, preparing you for mental invigoration.

This most potent autoflower strain primarily focuses its power on the body. Your mind is alight with unbridled positivity, but nobody could tell by simply looking at you. Instead, Yumbolt leaves you in a state of heavy couch-lock that eventually turns into a deep sleep.

This cultivar boasts stellar landrace genetics that facilitates your cultivation journey. Best grown inside, it thrives on continuous light exposure that kickstarts THC production.

TypeIndica-dominant
THC12–24%
FlavorsSweet, spicy, berry
EffectsEuphoric, calming, sleepy
Flowering time7–8 weeks
Yield14 oz./m² indoors / 12 oz./plant outdoors
Yumbolt
Yumbolt

3. G13

G13 gained fame in the early ‘90s and kept its place in the spotlight since. This powerful strain is now available as one of the strongest autoflowers, delivering the stuff of legend only two months from germination.

You wouldn’t assume potency upon the first whiff. The scent blend boasts notes of ripe fruit and dried herbs, light and fresh in your mouth. The mint-and-lavender aftertaste colors your day in bright hues.

The lightness translates into the effect profile with this strongest autoflower strain. You’re left carefree and ready to indulge in low-effort hobbies, with little cerebral action to speak of. Expect to drift off to sleep several hours after consumption.

Standard gardening practices are enough to achieve abundance with this beauty. Stable conditions produce hefty harvests of sticky buds to write home about.

TypeIndica-dominant
THC22–24%
FlavorsFresh, fruity, herbal
EffectsHappy, carefree, sleepy
Flowering time8–9 weeks
Yield15–19 oz./m² indoors / 2–3.5 oz./plant outdoors
G13
G13

4. Gelato

Gelato makes mouths water with its name alone, and nothing that follows falls short of the mark. This cream of the crop cultivar delivers a combination of indica and sativa qualities for tokers from all walks of life.

The flavor profile is enticing. Some traditional ganja fragrances greet your nostrils, but they’re barely noticeable between waves of sweetness. Your tongue savors tastes of orange and berry that satisfy any sweet tooth.

The effects of this high-THC autoflower are a treat for the mind and body. You’re uplifted after a blunt, with no negative emotion reaching your mind space. The munchies hit as your body prepares for profound TLC.

When it comes to TLC, very little of it makes these crops thrive. Provide branch support around harvest time and ensure ample light exposure to fatten the buds.

TypeHybrid
THC19–21%
FlavorsBerry, orange, wood
EffectsHappy, hungry, relaxed
Flowering time8–9 weeks
Yield14–17 oz./m² indoors / 2–3.5 oz./plant outdoors
Gelato
Gelato

5. Candy Cream

Candy Cream is yet another delicious-sounding, highest-THC autoflower worth your attention. The 90% indica genetic makeup delivers anything but a sugar rush, leaving you to luxuriate in absolute leisure several puffs in.

The smoke is thick and creamy, clinging to the tongue with its vanilla flavors. There’s a dash of earth in the bouquet, amplifying the taste of this dessert-tier weed.

The high is all about happiness and full-body heaviness. You stay stuck to your seat for long hours after your smoking session. The mind revels in complete positivity as the body buzzes with pleasure.

The genome makes this strongest autoflower easy for cultivation, too. Yields are impressive, and crops thrive in most environments, as long as there’s plenty of light for them to absorb.

TypeIndica-dominant
THC19–24%
FlavorsEarthy, creamy, vanilla
EffectsUplifted, calm, sleepy
Flowering time6–8 weeks
Yield14–15 oz./m² indoors / 2–3.5 oz./plant outdoors
Candy Cream
Candy Cream

6. Gorilla Glue #4

Gorilla Glue #4 deserves a place on every list of potent cannabis cultivars, including our strongest autoflower lineup. This adhesive hybrid gives a new meaning to the word sticky as you grow and smoke its fruits.

The perfume is a mishmash of seemingly opposing tones that work perfectly together. They cling to your tongue and paint everything you do. Connoisseurs can spend hours detecting every note.

Light it up, and you’ll get glued to the couch. The physical effects are oh-so-indica, while the mind soars, sativa-style. Tackle a creative project that requires no movement or sit back and revel in the slight trippiness.

Resin-rich flowers are inevitable with this cultivar, too. Keep your feedings generous and your conditions stable, and it awards you with abundant harvests.

TypeHybrid
THC19–22%
FlavorsFruity, wood, diesel
EffectsHappy, hungry, relaxed
Flowering time8–9 weeks
Yield15–19 oz./m² indoors / 3–7 oz./plant outdoors
Gorilla Glue #4
Gorilla Glue #4

7. Bubblegum

Bubblegum might not taste like the most potent autoflower, but it’s guaranteed to prove you otherwise. This full-body relaxer has some sativa in its flavor and effect profiles, delivering a 50-50 split of both canna-families.

The taste is what you’d expect from the name. A tropical blend of berries, mango, and pineapple oozes only gets more sugary on the inhale. The lingering aftertaste is pervasive and long-lasting.

The effects are powerful but well-balanced. You’re not the biggest fan of aggressive movement under Bubblegum, but you’re far from couch-locked. Best suited for social events and creative endeavors, this weed fuels you with unstoppable positivity.

Protect your garden to maximize output from this high-THC autoflower. Provide plenty of sunshine and moderate feedings to encourage bud growth and vigorous resin production.

TypeIndica-dominant
THC15–23%
FlavorsSweet, tropical, berry
EffectsEuphoric, energetic, creative
Flowering time8–9 weeks
Yield12 oz./m² indoors / 5 oz./plant outdoors
Bubblegum
Bubblegum

8. Sour Diesel

Sour Diesel hardly needs an introduction. It’s perfect for sativa enthusiasts who want a bit of indica in their smoking experience. Its clean infusion of energy doesn’t have you bouncing against the walls.

The intense perfume is recognizable to any expert. Smells of fuel, skunk, and fresh citrus fruit fire up the neurons. It might make you cough at first, but the smoke quickly grows on you.

The energy rush is near-immediate. Your body is ready to rock and the mind opens to receive and spread the love. Smaller doses let you remain productive while thinking outside the box. Several puffs more induce a fun psychedelic ride.

Resilience is the name of the game with this high-THC autoflower. Proper nutrition is key to successful cultivation, and the yields are unbelievable for its short seed-to-harvest period.

TypeSativa-dominant
THC16–23%
FlavorsDiesel, lemon, skunk
EffectsLively, trippy, energetic
Flowering time8–9 weeks
Yield12–14 oz./m² indoors / 1.5–6 oz./plant outdoors
Sour Diesel
Sour Diesel

9. Critical Purple

Critical Purple crosses two indica parents for a body-slammer of a plant. It easily earns the title of the strongest autoflower with its consistent potency and a high that never misses its mark.

The flavors of this sweet weed put you in the mood to wind down. Traditional cannabis scents with an added dose of sugar enchant your nostrils and taste buds, beckoning you to have another toke.

Mental clarity precedes the body effects with this highest-THC autoflower, letting you tackle tasks before settling down in a cozy spot. Once you do, the ride continues to get you ready for bed. It marvelously ends in a deep and peaceful slumber.

Cultivation is a walk in the park for anybody with some experience. Crank up the fans and grow lamps to get more flowers for fewer hours.

TypeIndica-dominant
THC20–25%
FlavorsSweet, earthy, citrus
EffectsHappy, calm, sleepy
Flowering time7–8 weeks
Yield14 oz./m² indoors / 5–7 oz./plant outdoors
Critical Purple
Critical Purple

10. Lemon

Lemon is a quintessential sativa for moderate cerebral action. Potent, refreshing, and insanely inspiring, this high-THC autoflower is the perfect pick-me-up for those dozy after-work afternoons.

The fresh smoke is all pine needles and lemon peel. The clean scent translates into a surprisingly tasty flavor profile. Novices love this light smoke, and experienced tokers will find it an excellent palate cleanser.

A rush of energy hits you as you’re savoring the last of the flavors. It leaves you capable of anything but geared towards creative tasks. Break out your instrument, book, or canvass, and get creating with nature in your corner.

Consistent conditions and regular care make these plants flourish in indoor grow rooms. Balmy outdoor environments produce similar results, especially if you shelter your crops from the elements.

TypeSativa-dominant
THC17–25%
FlavorsEarthy, lemon, pine
EffectsEuphoric, carefree, inspired
Flowering time7–8 weeks
Yield12–14 oz./m² indoors / 1–15 oz.plant outdoors
Lemon
Lemon

11. Big Devil

Big Devil is a gorgeous hybrid and the final entry on our strongest autoflower list. Powerful yet surprisingly gentle, it offers immense value as a relaxant and a stimulant. As such, it’s perfect for at-home nights with friends.

The aromatic bouquet has it all. Fruit in the perfume mixes with skunky notes and hints of freshly cut pine. Sweetness and spice combine to delight new and old-school tokers.

Fits of giggles await after several tokes of this high-THC autoflower. You’re soon free of physical and mental discomfort and immersed in the present moment.

The hardy herb doesn’t ask for too much as it grows, either. Be careful while managing its stretchy branches to let the colas fatten and enjoy a massive return on investment.

TypeHybrid
THC15–21%
FlavorsSweet, skunky, fruity
EffectsCreative, relaxed, sedative
Flowering time7–8 weeks
Yield15–22 oz./m² indoors / 1.5–12 oz./plant outdoors
Big Devil
Big Devil

Try the highest-THC autoflowers today

In the end, we hope that our list proved that the strongest autoflowers are worth your time and attention. Even stoners chasing extreme THC contents shouldn’t disregard autos.

Of course, if you prefer photoperiods, you’re free to grow them. Stick to one category or mix and match—it’s up to you. We’re only saying that you shouldn’t ignore a seed variant due to misconceptions. Let yourself play around and achieve excellent results for your effort.

Once you find your fav, visit our library and get seeds for your next growing journey. Stay tuned to our blog for more guides such as this one and never miss out on anything that the weed world has to offer.


About the author: Derek LaRose

Also known as Kronic from The Cannabis Kronicles, Derek LaRose is a young ambitious cultivator and a staple educator for indoor cultivation.