Critical Mass regular seeds (Mr. Nice Seedbank)

Out of stock
97.44 € / seed
15 seeds (0 packs) 97.44 €
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This commercial cannabis strain is not all about giant colas and heavy yields. Critical Mass would never be so popular without the instantly likable high: very strong, yet mellow and cheerful. For a habitual smoker, it could be a daily companion. Novice users are advised to adhere to the 4:20 rule though, using this pungent and earthy-smelling treat for evening relaxation alongside a big bag of Cheetos and a Netflix subscription.

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Mr. Nice Seedbank
Outdoor Indoor Greenhouse
650 - 750 g/m² indoors
500 - 600 g/plant outdoors
All characteristics

Critical Mass Strain Info

The strain’s predecessor was the famous Skunk #1, which became practically synonymous with super potent indoor weed. It has a long history and is among the best varieties of ‘old-school’. Critical Mass is a reworked version of the classic, and has only gotten better with time. These seeds are regular and can be used as a basis for highly rewarding breeding projects.


To keep all the desirable characteristics of the original genetics and enhance them, the breeder, the legendary Howard ‘Mr. Nice’ Marks, crossed it with an especially heavy phenotype of an Afghani Indica. The resulting hybrid turned out to be huge, resinous, and pungent-smelling. If anything could be better than the original Skunk #1, it’s definitely Critical Mass.


Expect the typical all-round ‘old-school’ buzz that engulfs your whole being, mind and body alike. The effects are easy to regulate by dosing (or your level of tolerance). This marijuana strain can be your best work companion or a strong sedative and antidepressant remedy that will help you enjoy your evening after the most exhausting day.

Smell And Taste

The strong influence of Skunk in its genetic makeup makes this weed extremely smelly, while the Afghani adds the rich taste of earth to its thick and pleasant smoke. Critical Mass has that recognizable terpene profile that most people associate with the classic ‘dank’.


This is where Critical Mass really shines. You can easily harvest as much as 750g/m2 (2.5oz/ft2) indoors, and outdoor yields are likewise impressive at up to 600g (1.3lb) per plant – plus, you don’t have to wait for them too long.

Flowering Time

Plant a Critical Mass next to other varieties, and odds are that it will be the first one to finish. To flower it indoors, you’ll need as little as 45-55 days, while outdoors, fully mature buds can be harvested in September (March in the Southern hemisphere).

Grow Tips

This strain is famously beginner-friendly. However, its record-breaking yield potential can lead to problems with mold and bud rot, which must also be taken into account.

  • Use defoliation to let air to every bud site.
  • Constantly check buds for signs of mold.
  • Never harvest too late, especially outdoors.

Critical Mass Seeds

This is a classic strain that’s been up for sale for ages, and the price is therefore quite low. Just remember that these are regular seeds, so buy twice as many as you would if they were feminized, as some will grow into male plants.


  • Brand Mr. Nice Seedbank
  • Type of seeds Regular
  • Type of seeds Photoperiod
  • Suitable for growing Outdoor
  • Suitable for growing Indoor
  • Suitable for growing Greenhouse
  • Effect Legend renewed
  • Genetics Afghan x Skunk #1
  • Harvest 650 - 750 g/m² indoors
    500 - 600 g/plant outdoors
  • Indoor flowering time 45 - 55 days
  • Outdoor finish Late September
  • THC No official information
    • Advantages
      A must have strain!
    • Disadvantages
      None! This strain is FANTASTIC!
    • General impressions
      Anyone who knows me knows my favourite strain of all time is critical mass because I never shut up about how amazing it is. Extremely intense in every way, long lasting body high, everything you hear sounds absolutely amazing and if you smoke enough, you’ll even get visuals similar to a good psychedelic trip. Critical mass literally improves literally everything, mood, pain, stress, anxiety (except for mobility, deadass you cannot move, the couch lock is real so make sure you get snacks in advance). Get ready for the most euphoric weed you will ever smoke...buckle up kids, this strain isn’t for a rookies
    • Advantages
      Top stuff
    • Disadvantages
    • General impressions
      Holy shit dude i love this strain, this strain is one of my new personal favorites. it has a nice sweet earthy taste. And also very smelly, but smells good. The high from this in a intense indica high, best i ever had!!! I HIGHLY recommend.
    • Advantages
      Made me feel relaxed and happy
    • Disadvantages
    • General impressions
      Probably some of the best, most potent weed I've had in a long time, not really suitable for an inexperienced smoker. Very heavy body high, changed vision (colors and everything looked so different and bright) very pleasant, relaxed and happy feeling. definitely not a day time weed because you will be on couch lock and sleeping like a baby in no time.
    • Advantages
      Perfect for melting into a couch and/or discussing mind blowing subjects such as other life forms in space, other life forms on earth.. etc
    • Disadvantages
    • General impressions
      I love growing, harvesting and consuming this beautiful flower. This indica, swiftly and smoothly, will wash away your sins of the day! Definitely one of my favorite strains to end the day. Perfect for melting into a couch and/or discussing mind blowing subjects such as other life forms in space, other life forms on earth.. etc. Growing this beautiful plant is like owning a fuel refinery. Not only is the smell so pungent it nearly smells like gasoline but the amount of flower this plant produces is astonishing. Medicinally, this strain does in fact work great for pain, definitely one of my “go-to”s whenever my back is acting up from previous motorcycle accidents.
    • Advantages
      Great strain! Worth trying
    • Disadvantages
      Didn’t notice any
    • General impressions
      Very strong body high for LONG time. Smoked a joint with a friend, and was tripping for a good hour and a half. The body high makes you feel everything around you and gives a slight feeling of dizziness, but not very serious. Some mind high as well. There was one moment in which I was eating chips and felt like I could see them inside my mouth and kept imagining different scenarios in which the chips were being chewed. All in all, great strain, maybe the best I've ever grown and smoked.