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Runtz XL Auto Feminized Seeds (Sweet Seeds)

Runtz XL Auto is Sweet Seeds’ tribute to one of the most sought-after genetics of recent years. Runtz became hugely popular thanks to her intense sweet and fruity aroma and multicolored buds. However, apart from the enormous bag appeal, Runtz XL Auto is also extremely potent. Containing up to 25% THC, this hybrid creates a surge of happy thoughts, giggles, desire to talk, and a euphoric body buzz to boot.

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Sweet Seeds
Outdoor Indoor
52.2 % Sativa / 47.1% Indica / 0.4% Ruderalis
THC 17 - 25 % CBD 0.5 %
All characteristics

Runtz XL Auto Strain Info

Runtz XL Auto is the result of years of careful breeding, with the aim of creating the real deal Runtz in autoflowering form. Expect this Sativa/Indica hybrid to be a THC-laden, sweet-smelling, rainbow-colored explosion of creativity and happiness.


Until recently, the original Runtz weed could only be found in one place on earth – Los Angeles, California. The strain’s family tree includes such potent treats as Gelato and Zkittles. Sweet Seeds have crossed a choice phenotype of Runtz with their best in-house autoflowers, stabilizing the result to create this masterpiece of a strain.

Flowering Time

The autoflowering features of Runtz XL Auto will be immediately obvious to growers, who can expect this plant to start flowering at any photoperiod and finish in just 8 weeks from sprout.


The ‘XL’ part in the name reflects both this plant’s size and high yield potential. This cannabis variety is capable of bringing in as much as 550g/m² (1.8oz/ft²) indoors and up to 175g (6.2oz) per plant outdoors.


Runtz XL Auto produces a hybrid high that fills both your mind and your body with tingling happiness, and you’ll start generating highly original and very pleasant thoughts. You’ll definitely feel the urge to share them with someone – and because no tiredness is caused by this weed, it’s a great option for parties!

THC And CBD Levels

These genetics were bred for the high percentage of THC, which ranges from 17-25%. Meanwhile, the CBD content is also respectable at 0.5% – just enough to take the edge off those hefty THC levels.

Smell And Taste

The terpene profile of Runtz XL Auto makes the buds burst with juicy fruity flavors and sugary sweetness. A bag of buds will smell like a bag of candies, while the taste of the smoke is smoother, tempered by a rich creaminess.

Grow Tips

The strain is remarkably easy to grow and can adapt to any setup, cultivation style, and level of experience.

  • Expect a plant height of 60-120cm (2-4ft).
  • Use LST to control its overall size and length of the side branches.
  • Also use SOG (sea of green) for maximum yields per square meter.

Runtz XL Auto Seeds

Thanks to Sweet Seeds’ breeding efforts, you can now enjoy the autoflower feminized seed version of this hype variety and still get the same quality buds that are offered for sale in LA’s dispensaries.


  • Brand Sweet Seeds
  • Sex Feminized
  • Flowering type Autoflowering
  • Suitable for Outdoor
  • Suitable for Indoor
  • Effect Zen without meditation
  • Genetics Runtz x Sweet Gelato Auto (SWS76)
  • Height 60 - 120 cm
  • Yield 400 - 550 g/m² indoors
    50 - 175 g/plant outdoors
  • From seed to harvest 56 days
  • Genotype 52.2 % Sativa / 47.1% Indica / 0.4% Ruderalis
  • THC 17 - 25 %
  • CBD 0.5 %
  • Dakush
    1 June 2021
    1 June 2021
    • Advantages
      Smells and looks amazing 👍
    • Disadvantages
      Nothing so far
      WIll let you know if any 😎
    • General impressions
      This is day 68. I flushed them yesterday with 3L of ph water each. Tuesday we will start Week 10 and the last week of the girls lifes <3. Babys are filled with fruity aromas , pungent af but the hints of fruitiness is just amazing . Buds are frosty even on the feeding leafs :,) They glitter like real life crystals. 👍
    Photos from customers
  • Green_Dream
    13 April 2021
    13 April 2021
    • Advantages
      Super strong weed. I prefer it at night cuz it gets me quite stoned.
      Small, compact, heavy, frosty buds.
      Very nice flavor! sweet, fruity, tropical.
    • Disadvantages
      Can cause dry mouth
    • General impressions
      It's been quite a learning experience!
      This definitely went better then the 100% coco girls.
      The plants performed quite good considering that I most probably amended the soil/coco mix with the wrong amount of nuts. There were also a variety of bugs present, gnat flies, trips, and something else that I don't even know what it was.
      The yield per plant is - 37, 40, 43, 45. To be honest I'm impressed. I'm convinced they can go over 50g/plant with the proper care.
      They all finished after 9 weeks, the last 2 at week 10. So definitely expect them to go beyond the 8 weeks. I find this a good thing, 8 weeks is to quick for a plant to grow truly big.
      I have 4 seeds left and I'm looking forward to see how the 2nd grow will go ;)
    Photos from customers

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