Runtz XL Auto Feminized Seeds (Sweet Seeds)

Sweet Seeds

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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.

  • Sweet Seeds
  • Feminized
  • Autoflowering
  • Outdoor
  • Indoor
  • Zen without meditation
  • Runtz x Sweet Gelato Auto (SWS76)
  • 60 - 120 cm
  • 400 - 550 g/m² indoors
    50 - 175 g/plant outdoors
  • 56 days
  • 52.2 % Sativa / 47.1% Indica / 0.4% Ruderalis
  • 17 - 25 %
  • 0.5 %

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.

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