C4 Auto feminized seeds

C4 Auto is an autoflowering feminized cannabis strain exploding with large, dense trichome-laden flowers emitting a sweet, pungent aroma that has won over the hearts of cannabis growers around the globe. Bringing in up to 650 g/m² after 9 weeks from seed, C4 Auto is a perfect addition to your grow list!

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

C4 Auto: Explosive Growth From This Potent Autoflower

Created by FastBuds, purveyors of high-quality autoflowering cannabis seeds, C4 Auto is an interesting cross between White Widow, Big Bud, Skunk and a Ruderalis clone. This real gem of a strain combines potency and high yields resulting from a unique genetic mix.

Large, Dense Buds Dripping With Resin

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 disease makes her an excellent choice for both indoors and outdoors 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. This strain finishes after just 9 weeks from germination due to her Indica-dominant genes. Here is some key information about this strain:

  • Short height – C4 Auto reaches a final height between 70 – 100 cm.
  • Max EC of water – 1.0 in veg, up to 1.3 in flower.
  • Water pH; 5.8 – 6.0.
  • Yield: 650 g/m2 (SOG); 400 g/plant outdoors.
  • Recommended lighting: Veg: 300 W CFL, Flower: 600 W HPS.
  • Recommended nutrients: CANNA COCO range.

Wonderful Smells And Aromas

C4 Auto’s buds are long, thick and dense and have an earthy, pungent aroma with spicy undertones and hints of citrus. They deliver a long-lasting, relaxed cerebral effects which is as expected as they usually testing at around 18 – 20% THC with small traces of CBD making excellent for medicinal use.


  • 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%
    • 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
    • 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!
    • 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. 😊
    • 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 (:
    • 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.
    • 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!