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Who are Critical Mass Collective?

Critical Mass Collective were born from the creation of Monster Mass in 2002 by a young man in Arizona. The focus was on monster Yields in short productive flowering times with powerful effects and so Monster Mass became the base strain of every cross in the Critical Mass Collectives breeding program.

Critical Mass Collective Strains

Critical Mass Collective use Monster Mass in all its breeding programs with the aim in perfecting high yielding cannabis strains with a variety of different positive atributes. They currently have around 10 Cannabis Strains for Sale and they have adopted a simple souvenir pack which protects the seeds from damage in a plastic vial stock with glue onto a business card. 

Critical Mass Collective Review

In our opinion Critical Mass Collective are a very good cannabis breeder with good reliability. They provide high yielding Marijuana genetics with lots of variety and prices are slightly cheaper than others at around £4-6 per Seed.  Because Critical Mass Collective sell well on our website and we don’t get any complaints we rate them 8/10. The reason Critical Mass Collective get a slightly higher score than some others is because of the quality and low price.

Critical Mass Collective Guarantee

At Just Feminized we can guarantee that your pack of Critical Mass Collective Seeds is less than 2 years old. We know this because we date every single pack of seeds that arrive into our office. We can also Guarantee that your seeds have been stored in the most professional conditions possible in our fridge. We can also guarantee that every pack of Critical Mass Collective Cannabis Seeds will come in the original Breeders packaging. The only thing we can't guarantee is the germination or growing of the plants as marijuana seeds are sold as souvenirs in the UK. If you have issues with specific products we would recommend approaching the breeder directly as individual breeders may assist your needs.


Critical Mass Collective Auto Massassin Fem 10 Seeds
  • Mass x AK47 x CMC Big Bud Auto
  • Medium High Yielding Strain
  • 55 Days Flowering Time
  • 100% Feminized Female Seeds
£51.75
Critical Mass Collective Auto Massassin Fem 5 Seeds
  • Monster Mass x AK47 x CMC Big Bud Auto
  • Height: 75-100 cm
  • Flowering Time: 55 Days
  • Yield: 450 gr/m²
£31.95
Critical Mass Collective Auto Masszar Fem 10 Seeds
  • Genetics: Monster Mass x Mazar x CMC Big Bud Auto
  • Flowering Time: 65-70 Days
  • Yield: Indoors 550 gr/pp, Outdoors 80-150 gr/pp
  • Taste: Deeply Hashy, Sweet Vanilla, Hints Of Orange
£51.75
Critical Mass Collective Auto Masszar Fem 5 Seeds
  • Monster Mass x Mazar x CMC Big Bud
  • 65 Days Flowering Time
  • Medium Cannabis Plant Height
  • Original Breeders Packaging
£31.95
Critical Mass Collective Auto Mendo Mass Fem 10
  • Monster Mass x Mendocino Purps x CMC Big Bud Auto
  • Indoor yield: Approx 550g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 60-120cm
£51.60
Critical Mass Collective Auto Mendo Mass Fem 5
  • Monster Mass x Mendocino Purps x CMC Big Bud Auto
  • Indoor yield: Approx 550g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 60-120cm
£32.30
Critical Mass Collective Auto Monster Mass Fem 10
  • Monster Mass x CMC Big Bud Auto
  • Indoor yield: Approx 800g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 60-140cm
£51.60
Critical Mass Collective Auto Monster Mass Fem 5
  • Monster Mass x CMC Big Bud Auto
  • Indoor yield: Approx 800g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 60-140cm
£32.30
Critical Mass Collective Auto Purple Dawg Fem 10
  • Monster Mass x Lavender x Purple Chemdawg x CMC Big Bud Auto
  • Approx 130-180g/per plant
  • Seed to ?ower: Approx 70-75 days
  • Height: Approx 0.80m-1.2m
£51.60
Critical Mass Collective Auto Purple Dawg Fem 5
  • Monster Mass x Lavender x Purple Chemdawg x CMC Big Bud Auto
  • Approx 130-180g/per plant
  • Seed to ?ower: Approx 70-75 days
  • Height: Approx 0.80m-1.2m
£32.30
Critical Mass Collective Auto Purple Skunk Fem 10
  • Monster Mass x Lavender x Afghani x CMC Big Bud Auto
  • Indica Dominant Flowering Time 50-60 Days
  • Indoors 600 gr/m², Outdoors 100-140 gr/pp
  • Height 60-120cm 18% THC
£51.60
Critical Mass Collective Auto Purple Skunk Fem 5
  • Monster Mass x Lavender x Afghani x CMC Big Bud Auto
  • Indica Dominant Flowering Time 50-60 Days
  • Indoors 600 gr/m², Outdoors 100-140 gr/pp
  • Height 60-120cm 18% THC
£32.30
Critical Mass Collective Auto Sour Mellon Fem 10
  • Monster Mass x Sensi Star x CMC Big Bud Auto
  • Indoor yield: Approx 670g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 0.60m-1.3m THC: 20%
£51.60
Critical Mass Collective Auto Sour Mellon Fem 5
  • Monster Mass x Sensi Star x CMC Big Bud Auto
  • Indoor yield: Approx 670g/m²
  • Seed to flower: Approx 70-80 days
  • Height: Approx 0.60m-1.3m THC: 20%
£32.30
Critical Mass Collective Monster Fem 10 Seeds
  • Genetics: Select Critical Mass x Select Critical +
  • Flowering Time: 45-50 Days
  • THC: 18-20% Intensely Fruity And Sweet
  • Yield: Indoors 700-800 gr/m², Outdoors 900+ gr/pp
£51.75
Critical Mass Collective Monster Fem 5 Seeds
  • Critical Mass x Select Critical +
  • Medium High Yielding Strain
  • Flowering Time Approx 55 days
  • 100% Feminized Female Seeds
£31.95
Critical Mass Collective Moonshine Fem 10 Seeds
  • Monster Mass x Old School Haze
  • Sativa Dominant Flowering Time 60-65 Days
  • Indoors 600 gr/m², Outdoors 750 gr/pp
  • Gin, Citrus, Hazey Pine Undertone
£51.60
Critical Mass Collective Moonshine Fem 5 Seeds
  • Monster Mass x Old School Haze
  • Sativa Dominant Flowering Time 60-65 Days
  • Indoors 600 gr/m², Outdoors 750 gr/pp
  • Gin, Citrus, Hazey Pine Undertone
£32.30
Critical Mass Collective Psychotropic Mass Fem 10
  • Genetics: Monster Mass x Cannatonic X
  • Yield: Indoors 550 gr/m², Outdoors 650 gr/pp
  • THC: 6.4% CBD: 6.4%
  • Taste: Tangy, Fruity, Caramel, Rich Honey
£51.75
Critical Mass Collective Psychotropic Mass Fem 5
  • THC: 6.4% CBD: 6.4%
  • High in Medicinal Values
  • Indoors 550 gr/m², Outdoors 650 gr/pp
  • Flowering Time: 55 Days
£31.95
Critical Mass Collective Purple Dawg Mass Fem 10
  • Monster Mass x Lavender x Purple Chemdawg
  • Approx 130-180g/per plant
  • Seed to ?ower: Approx 70-75 days
  • Height: Approx 0.80m-1.2m
£51.60
Critical Mass Collective Purple Dawg Mass Fem 5
  • Monster Mass x Lavender x Purple Chemdawg
  • Approx 130-180g/per plant
  • Seed to ?ower: Approx 70-75 days
  • Height: Approx 0.80m-1.2m
£32.30
Critical Mass Collective Purple Skunk Mass Fem 10
  • Genetics: Monster Mass x Lavender x Afghani Skunk
  • Flowering Time: 55-60 Days
  • Yield: Indoors 600-700 gr/m², Outdoors 850 gr/pp
  • THC: 20-22% Hash Flavour With Citrus Hints
£51.75
Critical Mass Collective Purple Skunk Mass Fem 5
  • Monster Mass Lavender Afghani
  • 8-9 Weeks Flowering Time
  • Medium High Strength Cannabis Strain
  • Official Dealer for this Breeder!
£31.95
Critical Mass Collective Super Mutant Mass Fem 10
  • Monster Mass x Shiva Skunk (Mutant Pheno)
  • Flowering Time 60 Days End September
  • Indoors 700 gr/m², Outdoors 900 gr/pp
  • Skunky, Wood, Lemon, Mango, Spice
£51.60
Critical Mass Collective Super Mutant Mass Fem 5
  • Monster Mass x Shiva Skunk (Mutant Pheno)
  • Flowering Time 60 Days End September
  • Indoors 700 gr/m², Outdoors 900 gr/pp
  • Skunky, Wood, Lemon, Mango, Spice
£32.30

20% OFF Greenhouse Cannabis Strains - for a limited time only - Simply add to cart and the discount will apply  2 Free Marijuana Seeds when you buy any 5 pack of Sweet Seeds - only while promo packs last

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Disclaimer:
Cannabis Seeds are sold as Souvenirs and germination is illegal in most countries!



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