10 Most Potent Autoflower Strains To Grow (2023 Update)

10 Most Potent Autoflower Strains To Grow (2023 Update)

Looking for High THC Autoflowering Seeds? Check this top 10 Most Potent, Strongest Autoflower Strains! Last updated 12/09/2023 9 min read

    Autoflowering cannabis strains grow fast and can pack a serious THC punch.

    Why does high THC matter? It's the component that gives the strong effects many seek – from relaxation to mood elevation.

    Here are 10 of the most potent autoflowers you might want to consider growing.

    Most Potent Autoflower Strains To Grow (Our Picks)

    1. Fat Bastard Autoflower

    A unique blend of Goldmember x Monkey Spunk with a touch of ruderalis, Fat Bastard autoflower boasts an impressive 37% THC level.

    Fat Bastard Autoflower Effects

    With a staggering THC content of 37%, Fat Bastard delivers a joyful high that starts with heady euphoria before gently settling into a body-wide relaxation. 

    Great for evenings, it can provide insomniacs with a peaceful night's rest. However, it's not for the faint-hearted, as this potent strain can be quite overwhelming, especially for beginners.

    Growing Fat Bastard Autoflower

    Expect rapid growth when cultivating Fat Bastard autoflower seeds. This fast-paced plant moves from seed to harvest in less than three and a half months. 

    Perfect for indoor cultivation, expect plants to stay under a manageable 130 centimeters. However, if you're venturing outdoors, these plants might stretch up to 150 centimeters. 

    When it comes to yield, indoor growers can anticipate up to 600 grams per square meter, while outdoor enthusiasts might see about 300 grams per plant. 

    Its growth rate and yield make it a standout among high yield autoflower seeds.

    2. Blackberry Moonrocks Autoflower

    Blackberry Moonrocks Autoflower is a potent fusion of Blue Moonrock and Blackberry Kush possessing a staggering THC content of 31%. 

    This indica-dominant strain charms users with its rich berry flavors and a high that's truly remarkable.

    Blackberry Moonrocks Autoflower Effects

    Packing a hefty 31% THC, Blackberry Moonrocks Autoflower starts off with a euphoric sativa buzz that soon gives way to the profound relaxation that indica strains are known for. 

    Best reserved for evening sessions, its potent effects can make you feel deeply anchored to your resting spot. 

    Ideal for those seeking relief from pain, anxiety, and sleep disorders, this strain is not recommended for beginners due to its intense high. 

    Consuming it might lead to dry eyes, dry mouth, and an undeniable munchies urge.

    Growing Blackberry Moonrocks Autoflower

    Blackberry Moonrocks Autoflower thrives both indoors and outdoors. For optimal growth, cultivate in well-draining soil with a neutral pH. 

    While it's adaptable to outdoor environments, indoor cultivation provides more control over essential elements like light and temperature. 

    To maximize yield, consider employing pruning techniques like low-stress training or defoliation. Ensuring a consistent environment, with temperatures of 21-26°C (70-79°F) and humidity at 40-50%, is vital. 

    Flowering typically initiates between the eighth to tenth week, allowing for the possibility of two harvests in a single outdoor season.

    3. Hellfire OG Auto

    With nearly 30% THC content, Hellfire OG Auto is an impressive strain known for its potency and deep relaxation.

    Hellfire OG Auto Effects

    With its nearly 30% THC, Hellfire OG Auto promises potent and multifaceted effects. Initially, users will experience a wave of euphoria, immediately setting a positive tone. 

    This mental uplift is succeeded by a gentle body calm, soothing muscle tension and banishing stress. 

    From a medicinal perspective, this strain proves effective in addressing physical discomforts, including persistent pain and joint ailments, and is also beneficial for mental health challenges like depression and bipolar disorder. 

    The risk of adverse effects is low, but overuse might induce anxiety or paranoia.

    Growing Hellfire OG Auto

    Hellfire OG Auto seeds are adaptable, flourishing in indoor, outdoor, or greenhouse environments. The inherent ruderalis genes in this strain make it resilient, adjusting well to various light cycles and conditions. 

    It does, however, prefer warm climates and shows a preference for organic soil. Implementing a Sea of Green training method can be beneficial for the yield. 

    Physically, expect a bushy, short plant with eye-catching minty green leaves. The flowering phase for Hellfire OG Auto is around 55 to 65 days, allowing for possible multiple harvests outdoors within one season. 

    In height, plants typically grow between 80 and 100 cm. Harvest yields are commendable, with indoor growers potentially collecting 300-400 grams per m², and outdoor cultivators might gather between 80 and 150 grams per plant.

    4. Bruce Banner Autoflower 

    Bruce Banner Autoflower is a robust strain boasting a remarkable 26% THC level, reminiscent of the formidable strength of its superhero namesake.

    Bruce Banner Autoflower Effects

    Lighting up Bruce Banner Autoflower, with its hefty 26% THC content, guarantees a high that's both uplifting and euphorically intense. 

    Users can anticipate surges of creativity, acute focus, and a spirited energy that obliterates any hints of laziness. 

    Such high THC levels emphasizes its potent impact, but side effects remain largely benign, with the usual dry mouth and eyes being most common. 

    Growing Bruce Banner Autoflower

    Bruce Banner Autoflower is an excellent choice for those in pursuit of both speed and bounty. 

    From planting, these seeds flourish into towering, Sativa-dominant plants that peak at 100 cm when grown indoors, all within a swift 10-13 weeks. 

    Suited for both indoor and outdoor environments, using organic fertilizers can further enhance its fertile growth. Watch in amazement as tiny buds evolve into glossy, solid marvels. 

    Indoor cultivators can reap up to 600 grams per m², whereas those growing outdoors can expect as much as 150 grams per individual plant.

    5. Gorilla Glue Autoflower

    When it comes to potency and ease of growth, Gorilla Glue Autoflower is a strain to reckon with, possessing a staggering 26% THC content.

    Gorilla Glue Autoflower Effects

    Beyond its cultivation benefits, Gorilla Glue Autoflower is renowned for its potent effects, attributed to its high THC value of 26%. 

    Consumers can look forward to a profoundly relaxed, euphoric, and uplifting experience, making it perfect for those moments when the objective is sheer relaxation. 

    While it’s a strain that will indeed keep you glued to your couch, it doesn't overpower to the point of drowsiness. However, it's worth noting its potency. 

    Newer users might experience mild anxiety, slight headaches, or the typical dry eyes and mouth.

    Growing Gorilla Glue Autoflower

    A strain suitable for both novices and seasoned growers, Gorilla Glue Autoflower offers a hassle-free cultivation experience. 

    Its nature as an autoflowering plant means it transitions from the vegetative to flowering stage on its own, regardless of the light cycle. 

    This particular feature allows growers to see the first signs of flowering just within the second week of its growth. In 8 to 10 weeks, you're presented with robust, resin-coated buds. 

    Whether you prefer indoor or outdoor cultivation, this strain adapts effortlessly. Indoors, the plant maintains a height ranging from 60 to 100 cm. 

    For outdoor enthusiasts, the plant reaches a slightly taller stature, averaging between 100 to 150 cm. Yield-wise, indoor growers can anticipate up to 550 grams per m². 

    Those growing outdoors can expect between 60 to 120 grams per plant, weather conditions being a determining factor.

    6. Lemon Autoflower

    Lemon Autoflower is a zesty Sativa-dominant cannabis strain with a THC value of 25%.

    Lemon Autoflower Effects

    Lemon Autoflower offers both recreational and medicinal users a powerful experience. A few puffs can bring about an uplifting and relaxing combination of effects. 

    With a THC content of 25%, its potency can't be ignored. Casual smokers, especially, should approach Lemon Autoflower with caution.

    Growing Lemon Autoflower

    When it comes to growing Lemon Autoflower, expect an easy and rewarding experience. This strain owes its short flowering time of seven to eight weeks to its ruderalis genetics. 

    Indoors, Lemon Autoflower yields up to 400 grams per m² and stays modest in height, reaching a maximum of 70 cm. 

    For those growing outdoors, these seeds can produce up to 150 grams per plant and reach heights between 80 - 100 cm. This compact size makes Lemon Autoflower an ideal choice for discreet cultivation.

    7. Critical Purple Auto

    Critical Purple Auto is a remarkable Indica dominant strain with a THC value of 25%, offering an exceptional blend of relaxation and therapeutic benefits.

    Critical Purple Auto Effects

    With a THC level sitting at 25%, Critical Purple Auto delivers a potent, long-lasting relaxation. 

    While it's perfect for winding down after a long day, be wary of its potential to render users completely numb, making it an ideal choice for evening or nighttime use. 

    Beyond relaxation, many turn to this strain for its potential benefits in reducing chronic pain, anxiety, and nausea, as well as inducing appetite—making it a potential choice for those undergoing chemotherapy or battling eating disorders. 

    Growing Critical Purple Auto

    Originating from a cross between Critical Mass, Big Bud, and Ruderalis, Critical Purple Auto seeds are a dream for both novice and expert growers alike. 

    The infusion of autoflowering genetics means these plants will start flowering without any need for light cycle adjustments. 
    Whether you're growing them inside or out, these seeds flourish, but they particularly thrive in hydroponic setups or compost. 
    Indoor growers can anticipate a height of about one meter, while those cultivating outdoors can expect an average height of 120 cm. 

    As for yields, indoor environments offer up to 400 grams per m², and outdoor growers can anticipate about 200 grams per plant.

    8. G13 Autoflower

    A mysterious yet popular strain, G13 Autoflower boasts a robust THC content of 24%, making it a sought-after cannabis variant in the market.

    G13 Autoflower Effects

    G13 Autoflower is predominantly an Indica strain but surprises users with a slight Sativa touch, offering a euphoric yet entirely mellow high. 

    Chronic stress, muscle spasms, or joint pain can be alleviated with this strain, underscoring its powerful analgesic properties. 
    For those battling sleep disorders, a higher dose can ensure a peaceful night's rest. With a THC value of 24%, caution is advised for novice users, as overconsumption might lead to mild paranoia or dizziness.

    Growing G13 Autoflower

    G13 Autoflower is a versatile seed, suitable for both indoor and outdoor cultivation. Indoors, growers can reap yields of 450 to 550 grams per m², whereas an outdoor setup offers around 100 grams per plant. 

    Thanks to its ruderalis genetics, it flourishes even in cooler climates and reaches a manageable height of 90 to 110 cm indoors and up to 120 cm outdoors. 

    This strain has a brief vegetative phase followed by a flowering time of 56 to 63 days, allowing multiple harvests for outdoor growers in one season. 

    Given its love for nutrients, a hydroponic setup could be an ideal choice. For maximized yields, employing the Sea of Green method can prove fruitful.

    9. Grape Ape Autoflower

    Grape Ape Autoflower is a delightful Indica-dominant hybrid boasting THC levels up to 24%.

    Grape Ape Autoflower Effects

    This strain doesn't skimp on potency with its impressive 24% THC content. Users can anticipate a two-fold experience. 

    Initially, Grape Ape Autoflower offers an intense relaxation paired with an uplifting surge in energy. But don't get too comfortable – within an hour, the dynamic cerebral effects transition into a hypnotic, meditative buzz. 

    Apart from recreational users, this strain can also benefit medicinal users. It's known to reduce muscle spasms, joint pain, and other chronic pain conditions. 

    Moreover, the strain can be a perfect choice for those under stress or anxiety, granting them a soothing yet energizing lift. 

    Growing Grape Ape Autoflower

    An enticing mix of Grape Ape and Auto OG Kush genetics, Grape Ape Autoflower seeds yield plants that are easy to manage indoors, outdoors, or in greenhouses. 

    While they tend to stay on the shorter side, between 80 to 150 cm, their growth is more expansive widthwise, making them resemble bushy small trees. 

    The leaves exhibit a vibrant shade of deep green, occasionally displaying stunning red and purple hues, making them not only a treat to smoke but a visual delight in your garden. 

    The flowering time is quite rapid, ranging from 49 to 54 days, allowing outdoor growers the luxury of multiple harvests in a single season. 

    When cultivated indoors, you can expect a yield of 450 to 500 grams per m². Meanwhile, outdoor conditions can offer up to 140 grams per plant.

    10. Haze Autoflower 

    Haze Autoflower is a unique cannabis strain with a remarkable THC content of 24%.

    Haze Autoflower Effects

    Haze Autoflower doesn't disappoint when it comes to potency, with its 24% THC content promising an impactful effect. Dominantly Sativa, users can anticipate an energetic and uplifting experience, with bursts of creativity. 

    However, a touch of Indica ensures relaxation settles in. New users and those unfamiliar with Haze strains should be cautious; overconsumption can lead to feelings of paranoia and anxiety.

    Growing Haze Autoflower

    Haze Autoflower stands out as an ideal choice for beginners due to its mold resistance and the ease that comes with its autoflowering nature. 

    Unlike many other strains, this one doesn't require a change in light cycle to initiate flowering. 

    Expect a relatively quick flowering time of 56 to 63 days, with the flowering phase kicking in just around 4 weeks of vegetative growth. For indoor growers, Haze Autoflower maintains a manageable height of 60 cm to 100 cm. 

    If you're considering an outdoor setting and ample sunlight, she can stretch up to 150 cm. The yield is equally impressive, with indoor growers anticipating about 350 to 450 grams per m². 

    Outdoor growth varies based on conditions but can yield between 100 to 200 grams per plant.