High-THC Auto Strains


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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Sort by: Cheap first High THC first Name (A - Z) Popular first 15% off Top New For Beginners Our Choice Mix Pack
Gelato Auto strain
1-yr Guarantee
Gelato Auto (Herbies Seeds)
4.9 (41)
19 - 21% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.06 £23.83 24.18 Save 0.35 £38.28 40.31 Save 2.03 £57.3 80.61 Save 23.31
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)
£7.14 £20.02 28.57 Save 8.55 £31.63 50.01 Save 18.38 £62.75 100.01 Save 37.26
Lemon Cherry Cookies Auto Feminized Seeds (Fast Buds)
New Extra Seeds
Lemon Cherry Cookies Auto (Fast Buds)
5 (3)
24 - 28% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.18 £35.26 £54.47 55.92 Save 1.45 £100.4 111.84 Save 11.44
Black Herer Autoflower Feminized Seeds (EGS)
1-yr Guarantee For Beginners 1+1=3
Black Herer Autoflower (EGS)
4.9 (28)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.6 £21.49 25.79 Save 4.3 £36.88 42.98 Save 6.1 £64.47 85.96 Save 21.49
Choco Thai Auto Feminized Seeds (Herbies Seeds)
1-yr Guarantee For Beginners Extra Seeds
Choco Thai Auto (Herbies Seeds)
5 (15)
23 - 25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.06 £25.38 32.24 Save 6.86 £38.28 56.43 Save 18.15 £60.22 112.86 Save 52.64
Big Bud Auto Feminized Seeds (Herbies Seeds)
1-yr Guarantee For Beginners Extra Seeds
Big Bud Auto (Herbies Seeds)
5 (27)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£8.06 £23.83 32.24 Save 8.41 £38.28 56.43 Save 18.15 £57.3 112.86 Save 55.56
Amnesia Z Auto strain
Extra Seeds
Amnesia Z Auto (Fast Buds)
5 (2)
24% THC
  • Feminized
  • Autoflowering
Extra Seeds
Pack (number of seeds)
£11.18 £53.37 55.92 Save 2.55 £98.42 111.84 Save 13.42
Purple Punch Auto Feminized Seeds (Fast Buds)
Extra Seeds
Purple Punch Auto (Fast Buds)
5 (8)
24% THC
  • Feminized
  • Autoflowering
Extra Seeds
Pack (number of seeds)
£11.18 £34.07 £53.37 55.92 Save 2.55 £98.42 111.84 Save 13.42
Mimosa Cake Auto Feminized Seeds (Fast Buds)
Extra Seeds
Mimosa Cake Auto (Fast Buds)
5 (9)
24% THC
  • Feminized
  • Autoflowering
Extra Seeds
Pack (number of seeds)
£11.18 £35.26 £100.4 111.84 Save 11.44
Auto Skywalker Haze strain Dutch Passion Seeds
For Beginners
Auto Skywalker Haze (Dutch Passion)
5 (6)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.72 £31.53 41.17 Save 9.64 £63.1 96.06 Save 32.96
Wedding Cheesecake Auto feminized seeds
Extra Seeds
Wedding Cheesecake Auto (Fast Buds)
5 (10)
24% THC
  • Feminized
  • Autoflowering
Extra Seeds
Pack (number of seeds)
£11.18 £35.64 £54.84 55.88 Save 1.04 £100.32 111.75 Save 11.43
Orange Sherbet Auto Feminized Seeds (Fast Buds)
Extra Seeds
Orange Sherbet Auto (Fast Buds)
4.8 (21)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.18 £35.23 £54.42 55.88 Save 1.46 £100.32 111.75 Save 11.43
Lemon Pie Auto feminized seeds
For Beginners Extra Seeds
Lemon Pie Auto (Fast Buds)
4.9 (11)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.17 £34.04 £54.42 55.87 Save 1.45 £100.32 111.75 Save 11.43
Gorilla G4 Auto feminized seeds Blimburn Seeds
Top
Gorilla G4 Auto (Blimburn Seeds)
0 (0)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£33.35 £51.74 66.71 Save 14.97
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)
£23.19 £32.65 38.64 Save 5.99
Smoothie Auto feminized seeds
15% off Extra Seeds
Smoothie Auto (Fast Buds)
5 (10)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.19 £34.08 £54.49 55.94 Save 1.45 £100.44 111.88 Save 11.44
Auto Desfran strain Dutch Passion Seeds
Auto Desfrán (Dutch Passion)
1 (1)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.53
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)
£7.7 £15.74 23.1 Save 7.36 £35.48 53.9 Save 18.42
Lemon AK Auto Feminized Seeds (Fast Buds)
For Beginners Extra Seeds
Lemon AK Auto (Fast Buds)
4.8 (28)
24% THC
  • Feminized
  • Autoflowering
For Beginners Extra Seeds
Pack (number of seeds)
£9.46 £29.62 £46.1 47.32 Save 1.22 £82.87 94.64 Save 11.77
Auto Glueberry O.G. feminized seeds Dutch Passion Seeds
15% off
Auto Glueberry O.G. (Dutch Passion)
4.9 (8)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£35.48
GG#4 Original Glue Auto (Glue Auto) feminized seeds
Extra Seeds
GG#4 Original Glue Auto (Glue Auto) (Fast Buds)
4.9 (21)
24% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.91 £35.64 35.74 Save 0.1 £54.83 59.57 Save 4.74 £98.34 119.14 Save 20.8
Blue Auto Mazar strain Dutch Passion Seeds
15% off
Blue Auto Mazar (Dutch Passion)
5 (3)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.72 £25.77 41.17 Save 15.4 £51.58 96.06 Save 44.48
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)
£31.51 £63.05 73.51 Save 10.46
Auto Ultimate feminized seeds Dutch Passion Seeds
15% off
Auto Ultimate (Dutch Passion)
4.9 (13)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.54 £63.13 73.6 Save 10.47
Auto Night Queen feminized seeds Dutch Passion Seeds
Top For Beginners
Auto Night Queen (Dutch Passion)
4.8 (12)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.53 £63.1 73.57 Save 10.47
Auto Daiquiri Lime strain Dutch Passion Seeds
15% off
Auto Daiquiri Lime (Dutch Passion)
4.8 (28)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.73 £31.54 41.18 Save 9.64 £63.13 96.09 Save 32.96
Auto Colorado Cookies strain Dutch Passion Seeds
15% off
Auto Colorado Cookies (Dutch Passion)
4.9 (9)
22 - 26% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£31.53 £63.1 96.06 Save 32.96
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)
£31.51 £63.05 73.51 Save 10.46
Purple Lemonade Auto RF3 Seeds (Fast Buds)
New
Purple Lemonade Auto RF3 (Fast Buds)
0 (0)
25 - 30% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£13.75 £36.1 41.26 Save 5.16 £55.87 68.77 Save 12.9 £94.56 137.54 Save 42.98
Vanilla Latte Autoflower Feminized Seeds (Humboldt Seed Company)
New
Vanilla Latte Autoflower (Humboldt Seed Company)
5 (3)
25 - 30% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£30.11 £45.6 50.19 Save 4.59 £81.73 100.37 Save 18.64
Jelly Donutz Autoflower Feminized Seeds (Humboldt Seed Company)
New
Jelly Donutz Autoflower (Humboldt Seed Company)
5 (4)
25 - 35% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£30.09 £45.56 50.15 Save 4.59 £81.67 100.29 Save 18.62
Humboldt Dream Autoflower Feminized Seeds (Humboldt Seed Company)
New
Humboldt Dream Autoflower (Humboldt Seed Company)
5 (4)
25 - 27% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£30.11 £45.6 50.19 Save 4.59 £81.73 100.37 Save 18.64
Durban Poison Autoflower Feminized Seeds (Humboldt Seed Company)
New
Durban Poison Autoflower (Humboldt Seed Company)
5 (4)
25 - 32% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£30.11 £45.6 50.19 Save 4.59 £81.73 100.37 Save 18.64
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)
£8.6 £21.49 25.79 Save 4.3 £36.88 42.98 Save 6.1 £64.47 85.96 Save 21.49
Ztrawberriez Auto Feminized Seeds (Fast Buds)
Extra Seeds
Ztrawberriez Auto (Fast Buds)
5 (3)
25% THC
  • Feminized
  • Autoflowering
Pack (number of seeds)
£11.18 £35.26 £54.47 55.92 Save 1.45
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)
£8.6 £21.49 25.79 Save 4.3 £36.88 42.98 Save 6.1 £64.47 85.96 Save 21.49
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: 27 September 2026

Shipping to the UK

How long does delivery to the UK usually take?

Delivery to the UK usually takes 3-6 days and is sent via Certified Mail. Additionally, if your order total reaches a certain threshold, shipping will be free (see the widget in the upper right corner of any product page).

Can I track my order after it has been shipped?

Yes, a tracking number is sent via email after dispatch. You can check the status of your order on the Tracking page.

Will my order be shipped discreetly?

Orders to the UK are always shipped discreetly, but there are two options. We can send the seeds in their original packaging inside an envelope that does not display the store’s name or any indication of the contents. Or you can choose Ninja Mode at checkout, where the seeds are repackaged in a discreet item.

See more information on our delivery terms on the Shipping page.

Payment in the UK

What payment methods are available in the UK?

In the UK, you can pay with a debit or credit card, via cryptocurrency (USDT or Bitcoin), or by bank transfer.

Will I be charged in pounds or euros?

Herbies displays prices in different currencies, but all card payments are processed in euros. If your card is in pounds sterling, the conversion is handled by your bank. You simply need to pay the amount shown in pounds sterling on your statement.

Will I have to pay any extra fees?

Herbies does not charge any additional fees, but you will likely incur a currency conversion fee charged by your bank or payment processor. If you send cryptocurrency, network fees may apply.

Are there any restrictions on the card I can use?

Standard credit or debit cards with 3D Secure and support for international transactions are required. American Express, prepaid, gift, Capital One, Cash App cards, and cards without 3D Secure are not accepted.

See extra information on the Payments page.

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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