Forbidden Runtz Auto Feminized Seeds (FastBuds)

13 €
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This brand-new variety of cannabis seed from FastBuds, Forbidden Runtz Auto, is impossible to resist, so prepare yourself for the taste of the original sin. Just 9 weeks of growing will fill your jars with delightfully frosty buds that blend flavors of fruit straight from the garden of Eden with decadent earthy aromas. This Runtz version is forbidden for a reason – the 26% THC content hits hard – so we dare you to toke and think of a more potent strain. It’s going to be a challenge!

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Fast Buds
Outdoor Indoor
35% Sativa / 65% Indica
450 - 550 g/m² indoors
50 - 150 g/plant outdoors
All characteristics

Forbidden Runtz Auto Strain Info

While the origins of Forbidden Runtz Auto remain unknown, we know one thing for sure: if it comes from a breeder like FastBuds, these cannabis seeds are sure to be a product of years of research and meticulous cross-breeding for stable genetics.


The family tree of Forbidden Runtz Auto seeds is based on Runtz genetics. You’ve probably heard about them, as after appearing on the market a couple of years ago, this Indica-leaning hybrid quickly became a number one strain in the top lists of all major cannabis media outlets. Now, Forbidden Runtz Auto continues the legacy as an improved lineage with its own twist.

Flowering Time

A true gem for impatient growers, the autoflowering Forbidden Runtz Auto is ready to harvest after just 9 weeks of growing – perfect for growing indoors all year round or outdoors in areas with short summers.


Despite its short stature, this marijuana strain produces medium amounts of top-quality bud. Indoors, you can expect to harvest up to 550g/m2 (1.8oz/ft2), while outdoor yields reach 150g (5oz) per plant.


Forbidden Runtz Auto is 65% Indica, and it shows! The effects are extremely potent and start cerebrally, often causing uncontrollable laugh riots. However, as the session progresses, you’ll feel the corporal effects take over, covering your body with warm covers of relaxation – perfect for whenever you need to calm both your body and mind.

THC And CBD Levels

FastBuds keeps breaking records with the potency of their autoflowering weed, and Forbidden Runtz Auto is no exception. The THC content of 26% is more than enough to send you floating in the stratosphere, so newbie smokers should definitely start low and increase the dosage gradually.

Smell And Taste

The flavor profile of Forbidden Runtz Auto is quite mellow and delicate. The selling point is definitely those fruity terpenes that form the base of the smoke and linger on the palate for quite some time. A great addition to this is the note of damp, fresh soil that’s noticeable in both taste and aroma.

Grow Tips

Forbidden Runtz Auto is an example of an ideal autoflowering structure. It stays stocky and short, just under 130cm (4’3”), while developing extra thick side colas that are almost as heavy as the central one.

  • Forbidden Runtz Auto seeds produce buds that are heavily covered in resin – perfect for making extractions.
  • It’s a low-maintenance strain, making it ideal for a first grow.
  • Forbidden Runtz Auto grows huge and dense buds with top bag appeal.

Forbidden Runtz Auto Seeds

Growers are crazy about Runtz varieties that never disappoint – make sure to grab your pack of seeds while stock lasts. Forbidden Runtz Auto is now available to buy from Herbies with worldwide delivery (including to the USA and UK), and you’ll also get free seeds with every order.


  • Brand Fast Buds
  • Type of seeds Feminized
  • Type of seeds Autoflowering
  • Suitable for growing Outdoor
  • Suitable for growing Indoor
  • Effect A bliss you will remember for long
  • Genetics Forbidden Runtz Auto
  • Height 90 - 130 cm
  • Harvest 450 - 550 g/m² indoors
    50 - 150 g/plant outdoors
  • Time from seed to harvest 63 days
  • % Sativa/ Indica/ Ruderalis 35% Sativa / 65% Indica
  • THC 26 %
  • CBD Low
    • Advantages
      Very productive plant and very easy to grow
      Flavour is one of the best i grew till now very fruity with tones of cream and sweet candy truly unique!!
    • Disadvantages
      Can cause dry mouth
    • General impressions
      This amazing Forbidden Runtz Auto from Fastbuds Cali line and this strain turned out very loud .
      Buds were incredibly rock hard and super sticky surely leaning towards the indica side for the compactness..
      Being a hybrid when smoking it you first feel a euphoric and talkative mood got me creative some times too..
      After a little while you start to feel that sedative power kick in but not so strong to block me yes it can be both a day and night smoke with ease..
      Wish all growers happy growing!!!
    Photos from customers
    • Advantages
      Smells FANTASTIC!
    • Disadvantages
    • General impressions
      What a cool plant to grow💕 She didn't tower like some of the Fastbuds plants I grow but that is most likely because of my crazy training. Topping early you have 50/50 chance to screw up the plant so keep that in mind.
      I will definitely grow this plant again, why? Holy hell does this smell amazing of fruity gas. Its crazy strong. Just touch her and your sticky and you smell lol. She is just covered in frost from top to bottom. Most definitely she will be tasty, I can't wait to try it.
    Photos from customers