High THC autoflowers are all about power and speed, delivering top-shelf potency without the hassle of complicated light schedules or long veg times – just plant, water, and enjoy. Whether you’re after an energetic daytime buzz or a heavy evening chill, these strains have the strength to satisfy both seasoned smokers and curious newcomers alike. Some high-THC autos have already earned legendary status among growers worldwide, so let’s take a closer look at the ones that truly stand out for their potency, speed, and unforgettable highs.

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Gelato Auto strain
1-yr Guarantee
Gelato Auto (Herbies Seeds)
4.9 (41)
19 - 21% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.12 £24.02 24.37 Save 0.35 £38.59 40.62 Save 2.03 £57.75 81.25 Save 23.5
Bruce Banner Autoflower Feminized Seeds (Seedkeepers) Seedkeepers
1-yr Guarantee New Extra Seeds
Bruce Banner Autoflower (Seedkeepers)
4.7 (12)
21 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£7.21 £20.19 28.82 Save 8.63 £31.91 50.44 Save 18.53 £63.3 100.88 Save 37.58
Black Herer Autoflower Feminized Seeds (EGS)
1-yr Guarantee 1+1=3
Black Herer Autoflower (EGS)
5 (27)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.67 £21.68 26.01 Save 4.33 £37.2 43.35 Save 6.15 £65.03 86.71 Save 21.68
Choco Thai Auto Feminized Seeds (Herbies Seeds)
1-yr Guarantee Extra Seeds
Choco Thai Auto (Herbies Seeds)
5 (15)
23 - 25% THC
  • Feminized
  • Autoflowering
1-yr Guarantee Extra Seeds
Pack (number of seeds)
£8.11 £25.55 32.46 Save 6.91 £38.54 56.8 Save 18.26 £60.62 113.6 Save 52.98
Big Bud Auto Feminized Seeds (Herbies Seeds)
1-yr Guarantee Extra Seeds
Big Bud Auto (Herbies Seeds)
5 (27)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.12 £24 32.47 Save 8.47 £38.56 56.83 Save 18.27 £57.7 113.66 Save 55.96
Amnesia Z Auto strain
Amnesia Z Auto (Fast Buds)
5 (2)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £31.22 33.82 Save 2.6 £48.9 56.36 Save 7.46 £90.18 112.72 Save 22.54
Purple Punch Auto Feminized Seeds (Fast Buds)
Purple Punch Auto (Fast Buds)
5 (8)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.26 £31.19 33.79 Save 2.6 £48.87 56.32 Save 7.45 £90.11 112.64 Save 22.53
Mimosa Cake Auto Feminized Seeds (Fast Buds)
Mimosa Cake Auto (Fast Buds)
5 (9)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £32.3 33.82 Save 1.52 £91.99 112.72 Save 20.73
Auto Skywalker Haze strain Dutch Passion Seeds
Auto Skywalker Haze (Dutch Passion)
5 (6)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.83 £31.78 41.49 Save 9.71 £63.6 96.81 Save 33.21
Wedding Cheesecake Auto feminized seeds
Wedding Cheesecake Auto (Fast Buds)
5 (10)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £32.68 33.82 Save 1.14 £50.28 56.36 Save 6.08 £91.99 112.72 Save 20.73
Orange Sherbet Auto Feminized Seeds (Fast Buds)
Orange Sherbet Auto (Fast Buds)
4.8 (20)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £32.3 33.82 Save 1.52 £49.9 56.36 Save 6.46 £91.99 112.72 Save 20.73
Lemon Pie Auto feminized seeds
Lemon Pie Auto (Fast Buds)
4.9 (11)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £31.22 33.82 Save 2.6 £49.9 56.36 Save 6.46 £91.99 112.72 Save 20.73
Gorilla G4 Auto feminized seeds Blimburn Seeds
Top
Gorilla G4 Auto (Blimburn Seeds)
0 (0)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£33.64 £52.19 67.29 Save 15.1
Girl Scout Cookies Auto feminized seeds (Auto Seeds)
Girl Scout Cookies Auto (Auto Seeds)
4.5 (6)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£23.37 £32.91 38.95 Save 6.04
Smoothie Auto feminized seeds
Smoothie Auto (Fast Buds)
5 (10)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £31.22 33.82 Save 2.6 £49.9 56.36 Save 6.46 £91.99 112.72 Save 20.73
Auto Desfran strain Dutch Passion Seeds
Auto Desfrán (Dutch Passion)
1 (1)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.78
Auto Critical Orange Punch Feminized (Dutch Passion) Dutch Passion Seeds
Auto Critical Orange Punch (Dutch Passion)
4.7 (16)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£7.76 £15.86 23.28 Save 7.42 £35.76 54.32 Save 18.56
Lemon AK Auto Feminized Seeds (Fast Buds)
Lemon AK Auto (Fast Buds)
4.9 (27)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£9.53 £27.12 28.59 Save 1.47 £42.21 47.65 Save 5.44 £75.87 95.31 Save 19.44
Auto Glueberry O.G. feminized seeds Dutch Passion Seeds
Auto Glueberry O.G. (Dutch Passion)
4.9 (8)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£35.76
GG#4 Original Glue Auto (Glue Auto) feminized seeds
GG#4 Original Glue Auto (Glue Auto) (Fast Buds)
4.9 (21)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£12.02 £32.68 36.05 Save 3.37 £50.28 60.09 Save 9.81 £90.18 120.18 Save 30
Blue Auto Mazar strain Dutch Passion Seeds
Blue Auto Mazar (Dutch Passion)
5 (3)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.83 £25.97 41.49 Save 15.52 £51.98 96.81 Save 44.83
Auto Xtreme feminized seeds Dutch Passion Seeds
Auto Xtreme (Dutch Passion)
5 (4)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£15.86
Auto White Widow feminized seeds (Dutch Passion) Dutch Passion Seeds
Auto White Widow (Dutch Passion)
4.7 (7)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.78 £63.6 74.15 Save 10.55
Auto Ultimate feminized seeds Dutch Passion Seeds
Auto Ultimate (Dutch Passion)
4.9 (13)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.75 £63.55 74.09 Save 10.54
Auto Night Queen feminized seeds Dutch Passion Seeds
Top
Auto Night Queen (Dutch Passion)
4.8 (12)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.78 £63.6 74.15 Save 10.55
Auto Daiquiri Lime strain Dutch Passion Seeds
Auto Daiquiri Lime (Dutch Passion)
4.8 (28)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.83 £31.78 41.49 Save 9.71 £63.6 96.81 Save 33.21
Auto Colorado Cookies strain Dutch Passion Seeds
Auto Colorado Cookies (Dutch Passion)
4.9 (9)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.78 £63.6 96.81 Save 33.21
Auto Blackberry Kush feminized seeds Dutch Passion Seeds
Top
Auto Blackberry Kush (Dutch Passion)
4.5 (11)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.78 £63.6 74.15 Save 10.55
Gelato Glue Autoflower Feminized Seeds (EGS)
1-yr Guarantee 1+1=3
Gelato Glue Autoflower (EGS)
5 (5)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.67 £21.68 26.01 Save 4.33 £37.2 43.35 Save 6.15 £65.03 86.71 Save 21.68
Ztrawberriez Auto Feminized Seeds (Fast Buds)
Ztrawberriez Auto (Fast Buds)
5 (3)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.26 £32.26 33.78 Save 1.52 £49.84 56.29 Save 6.45
Gorilla Purple Autoflower Feminized Seeds (EGS)
1-yr Guarantee 1+1=3
Gorilla Purple Autoflower (EGS)
5 (5)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.67 £21.68 26.01 Save 4.33 £37.2 43.35 Save 6.15 £65.03 86.71 Save 21.68
Grandmommy Purple Auto Feminized Seeds (Herbies Seeds)
1-yr Guarantee Extra Seeds
Grandmommy Purple Auto (Herbies Seeds)
4.7 (35)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.12 £24.02 32.5 Save 8.48 £38.59 56.87 Save 18.28 £57.75 113.74 Save 55.99
Gorilla Z Auto feminized seeds
Gorilla Z Auto (Fast Buds)
5 (2)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £32.3 33.82 Save 1.52 £49.9 56.36 Save 6.46 £91.99 112.72 Save 20.73
Cherry Cola Auto feminized seeds
Cherry Cola Auto (Fast Buds)
5 (2)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £31.22 33.82 Save 2.6
Auto Mix Pack #1 Feminized Seeds (Herbies Seeds)
1-yr Guarantee Mix Pack
Auto Mix Pack #1 (Herbies Seeds)
5 (21)
23 - 27% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£71.88
Kosher Cake Auto Feminized Seeds (Fast Buds)
Kosher Cake Auto (Fast Buds)
5 (5)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.27 £31.22 33.82 Save 2.6 £48.9 56.36 Save 7.46 £90.18 112.72 Save 22.54
Top review
avatar
...
12 November 2025
5
Stinky, sticky, and strong. That’s all you need to know
Top review
avatar
-
21 March 2025
5
GoodGerm 100%
Top review
avatar
///
24 October 2024
5
Not for the faint of heart! I had no problems with the grow; it was easy to manage and completed relatively quickly.

Apple Betty Auto (Herbies Seeds)

Apple Betty Auto is not only a strain; it's a force to be reckoned with. Boasting THC that can reach sky-high levels, this gem combines flavors of sweet apples with a one-punch hit of mental euphoria and heavy body relaxation. It’s a must-have for anyone seeking maximum strength without compromising on the speed or ease of autoflower convenience.

Why it’s a favorite: Growers love it for its explosive THC content and dense, resinous buds that sparkle like frosted candy.

Bruce Banner Auto (Fast Buds)

Inspired by one of the strongest comic book heroes, Bruce Banner Auto has the reputation (and the effects) to match. With earthy-diesel notes and a sweet finish, this strain blasts users with an uplifting cerebral high before easing into a relaxed body buzz.

Why it’s a favorite: Power and balance – a great match for those who demand energy and imagination without sacrificing depth or potency.

Auto Cinderella Jack (Dutch Passion)

When it comes to raw THC percentages, Auto Cinderella Jack is a record-setter. Dutch Passion created this strain specifically to push the limits of autoflower strength, and it delivers with THC levels that rival even the best photoperiods. Expect a clear, powerful high that leaves no doubt about its legendary status.

Why it’s a favorite: Because it’s proof that autos can be just as strong – if not stronger – than traditional strains.

Final Thoughts

Our High THC Auto Collection isn’t just about growing bud faster – it's about growing bigger. From old-school favorites like Bruce Banner Auto to newer heavy-hitters like Apple Betty Auto and Cinderella Jack, these strains demonstrate that autoflowers are in a new league altogether. If potency is top priority, you've come to the right place.

Last updated: 29 May 2026
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Written by
Jessica Turner
Cannabis writer and social activist

Jessica is a cannabis writer and activist focused on education, responsible use, and stigma reduction. She creates beginner-friendly content for Herbies Seeds and The Cannabook on Medium.

Reviewed by
Ethan Cole
Cannabis cultivation expert and writer
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