10 Strongest Autoflower Strains With Over 30% THC 🤯

Autoflowering cannabis strains are popular for their quick and easy growth cycle. But it's not just about speed; these strains now offer notable potency as well.

While some high-THC strains deliver impressive results, high-THC autoflower strains can take it to the next level.

This article explores 10 of the top autoflower strains with significant THC levels that are sure to impress.

1. Haze Auto - 24% THC

Haze Auto packs a punch with 24% THC, delivering an uplifting, energetic high that’s perfect for sparking creativity. This Sativa-dominant strain brings a cerebral buzz balanced with just enough relaxation to keep things smooth. 

Beginners love its easy-to-grow nature, thanks to Autoflowering genetics that eliminate light cycle worries. Indoors, it stays compact at 2-3 feet, making it ideal for small spaces, while outdoor plants can stretch up to 5 feet with ample sunlight. 

Expect quick results in just 8-9 weeks, with impressive yields of 450g per m² indoors and up to 200g per plant outdoors. Its potent effects and ease of growth make Haze Auto a favorite for growers and enthusiasts alike.

2. Grape Ape Auto - 24% THC

Grape Ape Auto has very high 24% THC. It starts with an uplifting head high then mellows into a chilled out body buzz. This easy strain grows well indoors or outdoors. The short, bushy plants reach around 1.5 feet tall.

Flowering is fast at just 7-8 weeks. Indoors it yields around 450g per m². Outdoors around 140g per plant.

3. G13 Auto - 24% THC

G13 Auto is a mostly Indica powerhouse with a potent 24% THC that delivers a deeply relaxing high, perfect for unwinding after a long day. Its effects are mellow yet impactful, offering a tranquil experience without overwhelming seasoned users.

Beginners should approach with care, as its high THC content can pack a serious punch. Compact and versatile, G13 Auto thrives indoors or outdoors, staying discreet at 90-120 cm tall.

Yields impress with 450-550g per m² indoors and up to 100g per plant outdoors. With a fast flowering time of just 8-9 weeks, it’s ideal for growers seeking quick and rewarding harvests.

4. Critical Purple Auto - 25% THC

This Indica-dominant strain delivers a knockout punch with 25% THC, offering a deeply relaxing high that’s perfect for unwinding into complete tranquility. Its effects are heavy-hitting, making it an ideal choice for evening enjoyment when you’re ready to slow down.

The autoflowering genetics make it effortless to grow, with plants automatically transitioning to flower without light cycle management. Indoors, they stay compact at around 1 meter tall, while outdoor plants can stretch to 120 cm.

Despite their manageable size, yields are generous, with up to 400g per m² indoors and 200g per plant outdoors. This strain’s potent effects and easy growth make it a go-to for those seeking power and simplicity in one package.

5. Lemon Autoflower - 25% THC

This sativa-leaning strain has potent 25% THC. It lifts mood and relieves stress but new users should go slow. The autoflowering genetics make it super easy to grow. Buds form in just 7-8 weeks from seed.

Indoors it stays short at 70cm, yielding 400g per m². Outdoors it reaches 80-100cm tall, yielding up to 150g per plant. The compact size suits discreet outdoor grows or tight indoor spaces. It combines zesty flavor and easy growing.

6. Gorilla Glue Autoflower - 26% THC

The 26% THC creates a potent euphoric, relaxing high. New users should be cautious. This easy autoflower transitions itself from vegetative to flowering. Pistils appear by week 2.

It finishes in just 8-10 weeks with thick, frosty buds. Indoors it stays short at 60-100cm, stretching taller outdoors to 100-150cm. Yields are 550g per m² indoors and 60-120g per outdoor plant.

7. Bruce Banner Auto - 26% THC

Bruce Banner Auto has very high 26% THC. The energetic, euphoric high boosts creativity and motivation with mellow side effects. This robust autoflower thrives indoors or outdoors. The tall sativa-dom plants finish quickly in 10-13 weeks from seed.

Using organic nutrients can further increase the hefty yields. Indoors it produces up to 600g per m² and 150g per plant outdoors.

8. Hellfire OG Auto - 30% THC

Hellfire OG brings the heat with nearly 30% THC, delivering an electrifying euphoric head rush that quickly transitions into full-body relaxation. The effects are powerful and balanced, offering an intense yet soothing experience.

With such high potency, it’s perfect for seasoned enthusiasts, but beginners should approach with caution. As an autoflower, Hellfire OG thrives in both indoor and outdoor environments, requiring minimal effort to flourish.

Compact and bushy, it fits well in tight indoor spaces, while warm climates and organic soil bring out its best outdoors. Flowering in just 55-65 days, it allows for quick turnarounds, with indoor yields up to 400g per m² and 150g per plant outdoors. 

9. Blackberry Moonrocks Auto - 31% THC

This strain has very high THC at 31%. It starts with an euphoric head-high then relaxes the body. The indica effects make it ideal for evening relaxation. However, the powerful high means caution for new users.

Blackberry Moonrocks grows well indoors or outdoors. Use quality soil and balance pH. Indoor growing allows control over factors like light and temperature to increase yields. Training techniques like low-stress training can also boost yields.

Flowering takes 8-10 weeks. The quick flowering allows 2 outdoor harvests per season where possible.

10. Fat Bastard Auto - 37% THC

This autoflowering cannabis strain has very high THC levels up to 37%. It produces a fast and intense high that leaves users deeply relaxed.

Despite being an autoflower, Fat Bastard grows quickly, finishing in under 3.5 months. Indoors it stays short, around 130cm, stretching slightly taller to 150cm outdoors.

Yields are very high for an autoflower. Indoors it can produce over 600g per m². Outdoors it yields around 300g per plant.