KOS – Black Poison

(2 customer reviews)
  • NAME: Black Poison F3
  • GROWING/BREEDING STYLE: True Living Organics (TLO)
  • LINEAGE: Black Forrest x Black Durban
  • YIELD/SIZE: Large
  • FLOWERING TIME INDOORS: 10 to 11 Weeks
  • SMELLS: Sharp and Hazey with Cat Piss and Nag Champa Incense
  • FLAVORS: Sharp Exotic and Acrid with Citrus or Lemony Notes  
  • STRETCH: 2x to 3x – Pheno Dependent 
  • PHOTOPERIODS: Sprouting 16/8 (or 12/12 for first 10 days), Veg 18/6, Flowering 12/12 
  • SATIVA/INDICA/RUDI RATIOS: About 80/20 Sativa Dominant 
  • HARVEST OUTDOORS: 1st Week of November – Northern Hemisphere 
  • BREEDING STYLE: Regular Seeds – Using Real Males – No Selfing, Reversing, or Femming Used Anywhere in KOS’ Breeding Philosophy

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To make the f3 generation seeds I used 3 f2 females and a single f2 male. One of these females was very Durban Poison dominant, while two of the females leaned more towards the Vietnamese Black from the Black Forrest P1 male used in the original cross. So, in these f3 plants there will be some variation regarding phenotypes. The Durban Poison dominant female had exceptional resin production. All the females were resinous for sure, but that f2 female definitely stood out, resin-wise. 

Sativa lovers holla! This one just may be exactly what you are looking for. First of all, she is quite resistant to mold and mildew; even handles rainfall well. The main difference between the Durban Poison dominant f2 Black Pison female and the f2 Black Poison that were more Vietnamese dominant is the hightype. The Durban female had a real deal rollercoaster ride. The high hits you in waves for hours after smoking. I find this a very fun ride and I have always loved this about the Durban Poison in the past. The Vietnamese dominant females held a steadier and more intense ride that kept building for about 20 minutes after smoking. Both are creeper and onset time is 20 min or so. Both have very long legs lasting for several hours staying very strong. 


Male Breeder(s) Deets: 1 superior f1 Black Forrest male was the paternal P1 in this cross. 

Female Breeder(s) Deets: 1 Black Durban female was the maternal P1 in this cross. This hybrid was the result of me crossing (Nebu’s) Black Russian female with 2 of my Durban Poison males I affectionately called “The Durban Brothers.” Wow! 

La Smoking Insights

My favorite part of this hybrid lies within her muse potential—yup—so very creative and clear type of a hightype. You will get super baked, make no mistake, but you won’t be “stuck on stupid” or as I call it, drooling on your shoes. 

This is a fantastic social smoke, great for movies, hiking, reading. You are able to still have your wits about you and retain your thoughts from minute to minute, unlike most weeds. I love to write under her influence and I’m sure she would be epic for any artistic endeavors like drawing or painting etc. Creative is really an understatement. This variety lights up my creative juices in a way no other cannabis has ever done. 

I made dry sift hashish from every female f2 breeder and I loved them all a lot. The buds from the Durban Poison leaning f2 female were denser than the other two females buds, however, they were still pretty dense, not airy whatsoever. 

Growing Instructions

She’s basically bulletproof. As with most sativa dominants don’t over love them, lol. This hybrid handles higher humidity levels well, she’s not invulnerable, but highly resistant to mold/mildew. I have seen these females go all the away to a November harvest date outdoors along the coast here in Southern Oregon without a bit of mold. While all other plants that were not Black Poison suffered from mold even though they had harvest dates in October. Like any worthy sativa her morphology protects the flowers from inclement weather like rain.

Please do not sprout these on a 24/0 photoperiod and KOS recommends 16/8 for sprouting and until 30 days old. Then switch to 18/6. Alternately…

Using a flowering photoperiod of 12/12 on sprouts for their first 10 days above ground, then switching them to an 18/6 photoperiod will allow you to easily sex them at 30 days of age—give or take 3 days

Always allow plants to get at least 55 days old from sprouting, before starting to flower for maximum resin production. Plants grown from seed work much better outdoors in the ground than clones do. Alternately, clones work much better in containers than plants from seeds do. Sprout seeds in ambient temps of 75 – 85 deg. F. Obviously KOS always recommends organically growing our gear in living soil for the full appreciation of smells and flavors, among many other reasons—cheers

Additional information

Weight 1 g

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Seed Type



2 reviews for KOS – Black Poison

  1. lowprofile

    Energetic grower!
    Mold resistant during a horrible summer, days of rain and 90%+ humidity.

  2. Neal D Miller

    6 months after harvest, I smile every time I open a mason jar.

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