Critical Mass Collective

Germination of cannabis seeds is illegal in the UK unless you have an appropriate license issued from the home office. However, collection and storage of cannabis genetics in seed form the UK is 100% legal. Information on cannabis seeds is for information purposes only and describes the cannabis genetics only, it is not intended to encourage anyone to cultivate cannabis or illegal and/or controlled substances. If you are from outside the UK, please check the laws in your own country before placing an order.

Monster Mass Is The Real Deal - Check It Out!

  • Organic Strains

  • Selected By Hand

  • Critical Mass Specialist

  • Incredible Genetics

  • Fems & AutoFems

Critical Mass Collective
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  1. Auto Sour Melon Mass

    Critical Mass Collective
    Auto Sour Melon Mass
    • A Whopping 20% THC
    • Heavy Resin Levels
    • Up To 670 gr/m2 Indoors
    • Height = 80-130 cm
    Auto Sour Melon Mass finishes quickly maturing in just 70-80 days from seed. Extra-large flowers are evenly distributed
    Auto Sour Melon Mass finishes quickly maturing in just 70-80 days from seed. Extra-large flowers are evenly distributed between the central cola and equally productive side branches for a truly impressive yield. You'll love the aroma! It's
  2. Auto Purple Dawg Mass

    Critical Mass Collective
    Auto Purple Dawg Mass
    • 18% THC, 70-75 Days From Seed
    • Blues, Greens, Purples & Pinks
    • Dense & Oily, Heavy Coat of Resin
    • Multiple Colas For High Yields
    You'll have to be fast to keep up with this big dawg! Critical Mass Collective's Auto Purple Dawg Mass goes fr
    You'll have to be fast to keep up with this big dawg! Critical Mass Collective's Auto Purple Dawg Mass goes from seed to mature weed in just 70 to 75 days total. When done, the average indoor yield is a whopping 600 gr/m2 of oily, terpene f
  3. Auto Purple Skunk Mass

    Critical Mass Collective
    Auto Purple Skunk Mass
    • Named For The Grapey Smell
    • Purple Phenotypes Are Rare
    • Hard-Hitting Indica Stone
    • Tastes Hashy With Notes of Caramel
    A real hard-hitter, Auto Purple Skunk Mass delivers true couchlock that's every bit as strong as her photoperiod si
    A real hard-hitter, Auto Purple Skunk Mass delivers true couchlock that's every bit as strong as her photoperiod sister. Yields are truly impressive and made up of massive, resinous buds that pop with neon green, soft pink and bright turquoise c
  4. Auto MASSzar

    Critical Mass Collective
    Auto MASSzar
    • Strong Skunk/Hash Aroma
    • Impressive Bag Appeal
    • Dark Green With Flashes of Blue
    • Instant Euphoria With a Relaxing Finish
    Enjoy a faster take on this reliable classic with Critical Mass Collective's improved version of the legendary Maza
    Enjoy a faster take on this reliable classic with Critical Mass Collective's improved version of the legendary Mazar strain. Auto MASSzar can now finish in just 65 days from seed with an epic 19% THC level. It's easy enough for beginners, f
  5. Auto Mendo Mass

    Critical Mass Collective
    Auto Mendo Mass
    • Grape, Berry & Floral Taste
    • 70-80 Day Finish From Seed
    • Powerful, Sedating Stone
    • Sheer Beauty Meets Max Power!
    Monster Mass amps up this Purple Auto until it reaches top potency and yield. Average THC reaches a satisfying 19% and t
    Monster Mass amps up this Purple Auto until it reaches top potency and yield. Average THC reaches a satisfying 19% and the final payload weighs in at 550 gr/m2 indoors. However, you'd grow Auto Mendo Mass for her looks and smell alone. The purpl
  6. Auto Monster Mass

    Critical Mass Collective
    Auto Monster Mass
    • 20% THC - Outstanding!
    • 70-80 Day Finish From Seed
    • Killer Yields - 800 gr/m2
    • Neon Green, Purple & Blue
    Auto Monster Mass didn't lose a thing to gain her incredible speed. Within 80 days from their start, this autoflowe
    Auto Monster Mass didn't lose a thing to gain her incredible speed. Within 80 days from their start, this autoflowering strain will bend to the breaking point with an abundant yield of massive buds that shimmer with golden resin. Calyxes can be
  7. Auto Massassin

    Critical Mass Collective
    Auto Massassin
    • Tastes Like Lemon Candy
    • Tightly Rolled Buds - Oily
    • Easy To Train
    • Very Fast Indoors or Out
    In just 55 days from seed, Auto Massassin can deliver up to 100 grams each of gigantic buds drenched in resin and powere
    In just 55 days from seed, Auto Massassin can deliver up to 100 grams each of gigantic buds drenched in resin and powered by an outstanding 20% THC level. The high is devastatingly strong with a hard-hitting, full-body buzz that will eventually mello
  8. Purple Dawg Mass

    Critical Mass Collective
    Purple Dawg Mass
    • Inspiring Diesel High
    • Fuel, Earthy Smells
    • Very High Yields
    • Beautiful Colourful Buds
    Purple Dawg Mass turns up the volume to 10+ with THC that can go all the way to 25%. The high doesn't last as long
    Out of stock
    Purple Dawg Mass turns up the volume to 10+ with THC that can go all the way to 25%. The high doesn't last as long as some other strains, but it's quite a ride - relaxing, inspiring and full of positive vibes. There are 3 different phenos i
  9. Psychotropic Mass

    Critical Mass Collective
    Psychotropic Mass
    • 1:1 Ratio of CBD to THC
    • Exotic Lemon Spice Taste
    • Quick 55 Days Flowering
    • Dense Buds - Very Appealing
    This is an unbeatable and useful medical cannabis seed, created by using genetics from the almighty Cannatonic. You'
    This is an unbeatable and useful medical cannabis seed, created by using genetics from the almighty Cannatonic. You'll find evenly balanced CBD and THC ratios here, along with significant harvest capabilities and an amazing exotic lemon and pine
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