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C4 Auto feminized seeds

C4 Auto is an autoflowering cannabis strain exploding with large, dense, trichome-laden flowers that emit a sweet, pungent aroma, and which have won over the hearts of cannabis growers around the globe. Bringing in up to 650g/m² after just 9 weeks from seed, she is a perfect addition to any enthusiast's grow list. Simply bask in the glory of her intense relaxation and release!

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Fast Buds
Outdoor Indoor
55% Sativa / 45% Indica
THC 20 % CBD < 1%
All characteristics

C4 Auto Strain Info

Created by FastBuds, purveyors of high-quality autoflowering cannabis seeds, C4 Auto is an interesting 55% Sativa, 45% Indica hybrid cross between an exciting family tree and a Ruderalis clone. This real gem of a strain combines potency and high yields resulting from this unique genetic lineage, along with addictively enjoyable relaxation and a one-of-a-kind blend of aromas.


The memorable lineage worth mentioning includes White Widow, Big Bud, and Skunk – all strains with high reputations in the cannabis world.

Flowering Time

This strain finishes after just 63 days from germination due to her well-balanced Indica-Sativa genetics.


She produces jaw-dropping indoor yields between 450-600g/m2 (1.5-2 oz/ft2), and up to 200g (7oz) per plant outdoors.


She doesn’t cease to come out on top when it comes to effects either, as she delivers a long-lasting cerebral hit that relaxes the senses in waves and works wonders for medicinal users.

THC and CBD Levels

C4 Auto’s effects are thanks to her 18-20% THC content, complemented by small traces of CBD.

Smell and Taste

Her buds are dense and coated in pungent trichomes, with terpenes producing an earthy aroma complete with spicy undertones and refreshing hints of citrus.

Grow Tips

Growing fast and vigorous with tight internodes, C4 forms one large main cola with decent collateral branching. Her short height and great resistance to pests and diseases make her an excellent choice for both indoor and outdoor growers. In addition to her high yields of potent buds, she requires very little trimming post-harvest due to her high calyx-to-leaf ratio – a great strain for both beginners and professional growers alike. Here’s some key grow info about this strain:

  • C4 Auto is a short plant that reaches a final height of 70-100cm (27-39”).
  • We recommend using 300 W lighting during vegetation, and 600 W HPS or LED lighting during flowering when growing indoors.

C4 Auto Seeds

Despite her somewhat robotic name, C4 Auto blooms into a lush, vibrant, high-yielding strain that you will want to grow over and over again. So, before it's too late, buy a pack of her feminized seeds right here online at Herbies and grow her next season!


  • Brand Fast Buds
  • Sex Feminized
  • Flowering type Autoflowering
  • Suitable for Outdoor
  • Suitable for Indoor
  • Effect Swinging on the waves of relaxation
  • Genetics White Widow x Big Bud x Skunk x Ruderalis
  • Height 80 - 120 cm
  • Yield 450 - 600 g/m² indoors
    50 - 200 g/plant outdoors
  • From seed to harvest 63 days
  • Genotype 55% Sativa / 45% Indica
  • THC 20 %
  • CBD < 1%
  • Mr_Pgrow
    7 September 2021
    7 September 2021
    • Advantages
      Love the look of C4, nice big dence chunky buds which really swelled in size. Very easy to grow with no problems. 
    • Disadvantages
    • General impressions
      C4 looks amazing and love the look of these big chunky dence buds.
    Photos from customers
  • Benji
    18 March 2020
    18 March 2020
    • Advantages
      A wow strain! Very potent girl. My plant is a THC monster, wow cool.. earthy, pungent aroma with spicy undertones and hints of citrus..
    • Disadvantages
      Can cause paranoia
      To be honest, I have no idea why she sprouted so tall and has foxtailed buds.
    • General impressions
      She's a THC MONSTER. She is the most potent strain I've ever grown. She is my favorite strain despite all drawbacks. I like my new hobby))) Happy growing to you all!
  • medicalcannabelfast
    4 February 2020
    4 February 2020
    • Advantages
      A pure pleasure to grow. Not picky at all. The smell is amazing! She tastes like berries with earthy and fruity notes (:
    • Disadvantages
      The top half of the colas are tight and solid the lower half is a little light and airy (:
    • General impressions
      Easy growing. This beautiful strain with deep purple hues is covered with glistening trichomes. My scissors were covered in sticky purple hash (:
    19 February 2020
    19 February 2020
    • Advantages
      Fantastic sweet aroma with a touch of lemons and berries. Nice dense buds with a pleasant sativa high and a touch of indica relax. I like her! + My friends like this strain so much..)))
    • Disadvantages
      It isn’t the easiest strain to grow.. sensitive to overfeeding
    • General impressions
      The overall impression is good. I will definitely grow C4 auto again. Big thanks to Herbies head shop. 😊
  • Chunky_But_Funky1
    1 February 2020
    1 February 2020
    • Advantages
      Great strain from start to finish 😊
      Potent genetics
      Easy growing
      Positive effects: euphoric, giggly, happy 😊
      I love C4 Auto! Fantastic strain!
    • Disadvantages
      Yields could be better
    • General impressions
      Easy to grow strain. Amazing genetics, beautiful strain 😊 A+ rate strain.
  • grow_doctor
    18 January 2020
    18 January 2020
    • Advantages
      Absolutely love this strain))) Buds are so dense))) Easy growing)) Super strain for novice growers)))
      Nutrients: Canna, Terpinator, Botanicare, OG Tea – awesome stuff
    • Disadvantages
      Can cause dry mouth
    • General impressions
      Easy to grow strain. The plants are not picky. She has nice pretty reddish/purplish buds. She smells and tastes awesome... I want more! Great choice for beginners. Totally recommend it! 😎 Many thanks to Herbies!

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