Anonymass Auto

Critical Mass Collective

If you do what you always did, you will get what you always got. These seeds are definitely worth a try.

RRP CA$22.71

Your Price

Club Price

CA$17.50

GYO Club Saves

CA$1.95

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

As with all the plants from Critical Mass Collective, this is extremely high-yielding and fast-growing and always responds favourably to a little gardening. The quality is evident in the aromas that fill the grow space, and the power is presaged by the blanket of diamonds coating every square inch of this beautiful plant. Strength, stability and a supermassive crop.

100% Feminized Marijuana Seeds
Above Average Yields
High THC

Massassin Auto

Critical Mass Collective

Licence to chill.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

The Massassin has a track record of reliability and shows explosive vigour in the growth. It is tasty, sassy, cold-blooded, stable, aggressive and ruthlessly potent. It strikes within seconds of the first hit with unwavering accuracy and once under its spell - escape is impossible. It is also hugely productive and delivers record-breaking yields every time.

100% Feminized Marijuana Seeds
Average Yields
High THC

Masszar Auto

Critical Mass Collective

Masses of magical Mazar.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

There are few plants that could claim to be as attractive and alluring as the Masszar. It has a beautiful plumage that complements the vibrant flavours and complex aroma, and predicts the colourful, euphoric buzz. The yields, though, are the true draw of the plant - big, bountiful and very easy to produce.

100% Feminized Cannabis Seeds
Above Average Yields
High THC

Mendo Mass Auto

Critical Mass Collective

Drive your mates purple with envy!

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

Monster Mass meets Mendocino Purps and CMC Big Bud Auto to create a new autoflowering plant with big yields and even bigger THC levels. This is a really attractive specimen that brings a lot of love to any growspace – and did we mention she’s also one of the strongest Auto Purple strains on the market?

100% Feminized Cannabis Seeds
Above Average Yields
Grows Anywhere

Monster Mass

Critical Mass Collective

Only buy these seeds if you like huge yields of amazing marijuana.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

The Monster Mass produces a mammoth reserve of pungent, powerful, skunky weed. The flavours are intense, the high is potent and extremely long-lasting, and the growing plant is a shimmering, breathtaking beauty.

100% Feminized Cannabis Seeds
Heavy Yields
High THC

Monster Mass Auto

Critical Mass Collective

What’s that coming over the hill…?

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

This monstrous plant is perfect for indoor and outdoor cultivation and is known for its out-of-this-world aroma and strong sedative effect. A real mind-melter, this is one to save for a special occasion!

100% Feminized Marijuana Seeds
Heavy Yields
Grows Anywhere

Moonshine Mass

Critical Mass Collective

Christ-Mass has come early…

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

This intoxicating sativa plant has a complex and distinct aroma, a ridiculously quick and vigorous flowering period, and delivers a strong, energetic, long-lasting punch to the solar plexus when smoked.

100% Feminized Cannabis Seeds
A Mostly Sativa Strain
Above Average Yields

Psychotropic Mass

Critical Mass Collective

Amazing medicine with a gorgeously long-lasting high.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

The Psycho' Mass is a seriously stinky plant with thick, skunky aromas complemented by subtle, spicy notes. The high is more psychotropic than psychoactive, smooth, good-natured and long-lasting, with extremely high-grade medicinal properties. One of the biggest appeals is the look of the plant - the flower structure is dense and compact and the nuggets are sparkling, light green and flecked with thousands of beautiful white and orange hairs. It never fails to amaze.

100% Feminized Marijuana Seeds
Above Average Yields
Low THC

Purple Skunk Mass

Critical Mass Collective

A group of fine genes swollen by the Monster Mass.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

One of the stinkiest of the Critical Mass Collective catalogue, the Purple Skunk Mass is a hugely productive, extremely rewarding plant with a great genetic heritage. Lavender and Afghan Skunk are boosted by the Monster Mass and the yields approach 850 g/plant outdoors - with absolutely no compromise in quality.

100% Feminized Marijuana Seeds
Above Average Yields
Very High THC

Sour Melon Mass Auto

Critical Mass Collective

A genetic force to be reckoned with.

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

This vigorous, high-THC, autoflowering plant produces yields of 670 g/m2 indoors and up to 180 g/plant when grown al fresco. It can be trained to remain reasonably short and produces a deep, mellow, contemplative stone when smoked.

100% Feminized Weed Seeds
Above Average Yields
Grows Anywhere

Super Mutant Mass

Critical Mass Collective

Massive in every sense of the word… The monster lives!

RRP CA$19.66

Your Price

Club Price

CA$15.16

GYO Club Saves

CA$1.68

RRP CA$42.70

Your Price

Club Price

CA$37.86

GYO Club Saves

CA$4.21

RRP CA$68.48

Your Price

Club Price

CA$60.73

GYO Club Saves

CA$6.75

RRP CA$123.26

Your Price

Club Price

CA$109.33

GYO Club Saves

CA$12.14

A mutant Shiva Skunk phenotype meets the already powerful Monster Mass to create an insanely strong specimen that’s one of the heaviest producers in the breeder’s catalogue. Easy to grow and stress-free, this is an ideal plant for all growers regardless of experience.

100% Feminized Weed Seeds
A Mostly Indica Strain
Heavy Yields

0 of 300 left

King's Kush CBD

Greenhouse Seeds

RRP	Discount	You save
$10.23	32%	$2.84

$5.99

View Deal

0 of 100 left

Caramelo

Delicious Seeds

RRP	Discount	You save
$7.45	35%	$2.46

$4.49

View Deal

0 of 100 left

Girl Scout Cookies Auto

Fast Buds

RRP	Discount	You save
$11.98	46%	$5.97

$6.95

View Deal

Strains Of The Month

$10.28

Pineapple Chunk

Sex	Feminised
Type	Mostly Indica
Flowering	6-8 weeks

$15.34

Black Diesel

Sex	Feminised
Type	Mostly Sativa
Flowering	8-10 weeks

$7.82

Bubblelicious

Sex	Feminised
Type	Mostly Indica
Flowering	8-10 weeks

$7.40

Critical Impact

Sex	Feminised
Type	Mostly Indica
Flowering	8-10 weeks

Community Poll

Featured Strains

Auto Bomb

$9.99

Auto Bomb

Sex	Feminised
Type	Indica / Sativa / Ruderalis
Flowering	8-10 weeks

KC39

$9.72

KC39

Sex	Feminised
Type	Indica
Flowering	8-10 weeks

Northern Lights

$7.82

Northern Lights

Sex	Feminised
Type	Mostly Indica
Flowering	8-10 weeks

Alpujarrena

$9.52

Alpujarrena

Sex	Feminised
Type	Mostly Indica
Flowering	6-8 weeks

Mexican Sativa

$3.61

Mexican Sativa

Sex	Regular
Type	Mostly Sativa
Flowering	8-10 weeks

Incredible Bulk

$13.63

Incredible Bulk

Sex	Feminised
Type	Mostly Indica
Flowering	6-8 weeks

Chem Valley Kush

$13.93

Chem Valley Kush

Sex	Regular
Type	Hybrid
Flowering	8-10 weeks

LA Affie

$23.17

LA Affie

Sex	Feminised
Type	Indica
Flowering	8-10 weeks

Fruity Thai

$6.15

Fruity Thai

Sex	Regular
Type	Indica / Sativa
Flowering	6-8 weeks

Chronic

$20.26

Chronic

Sex	Feminised
Type	Hybrid
Flowering	8-10 weeks

Cum Laude

$15.14

Cum Laude

Sex	Feminised
Type	Sativa
Flowering	8-10 weeks

Lemon Juice Express Auto

$9.32

Lemon Juice Express Auto

Sex	Feminised
Type	Mostly Indica / Ruderalis
Flowering	8-10 weeks

Kuchi

$6.91

Kuchi

Sex	Regular
Type	Mostly Indica
Flowering	8-10 weeks

Sour Diesel #2

$8.71

Sour Diesel #2

Sex	Regular
Type	Mostly Sativa
Flowering	8-10 weeks

Killer Kush Auto

$10.74

Killer Kush Auto

Sex	Feminised
Type	Indica / Sativa / Ruderalis
Flowering	6-8 weeks

CBD Critical 47

$16.19

CBD Critical 47

Sex	Feminised
Type	Mostly Indica
Flowering	6-8 weeks

Mr. Fix

$8.29

Mr. Fix

Sex	Feminised
Type	Indica / Sativa
Flowering	8-10 weeks

Taison Auto

$8.29

Taison Auto

Sex	Feminised
Type	Indica / Sativa / Ruderalis
Flowering

NL Mazar Autoflowering

$9.95

NL Mazar Autoflowering

Sex	Feminised
Type	Indica / Sativa / Ruderalis
Flowering	8-10 weeks

CBD Pure Hazeling

$14.74

CBD Pure Hazeling

Sex	Regular
Type	Mostly Sativa
Flowering	6-8 weeks

Critical Mass Collective Cannabis Seeds: improving upon perfection.

Critical Mass is a weed seed strain famous throughout the entire 420 world for its huge yields, fearsome power and vigorous growth. But even the best strains can be improved upon.

In 2002, a young breeder from Arizona forged his own superior Critical Mass hybrid, one of enhanced productivity, strength and resilience, aptly named Monster Mass. That man was the now legendary, Critical Lee. He began sharing his genetics among close friends, companions and like-minded people he had met on his travels and through the Internet. Together, they set about creating the best reworked versions of Critical Mass the world has ever seen. The collective is now the fastest growing network of Critical Mass enthusiasts on the planet and boasts well over 100 years of breeding experience between them. The result is a selection of the biggest, baddest Critical Mass hybrid strains of modern times. If you are a fan of Critical Mass feminized seeds, you will go absolutely nuts for the entire Critical Mass Collective range.

Critical Mass Collective: genetics of mass production.

All Critical Mass Collective feminized weed seeds are produced organically with the help of Humboldt Earth Tech. They are then hand-selected to ensure maximum viability and quality. Each cannabis seed strain is put through a rigorous testing programme and will not be considered ‘Critical Lee acclaimed’ until it has scored highly and consistently in a multitude of quality control categories. All Critical Mass Collective feminized marijuana seeds are kept in large, temperature and humidity controlled vaults maintained at a constant 6-8 degrees Centigrade - the perfect climate to keep marijuana seeds fresh and viable.

Nobody takes more care of its seeds than Critical Mass Collective, and we are extremely proud to offer its entire range here, at GYO Seedbank.

Best Selling Breeders

Strains Of The Month

Feminized HOT PICKS

Search by strain type View all Strain Types

Regular HOT PICKS

Search by strain type View all Strain Types

Autoflowering HOT PICKS

Search by strain type View all Strain Types

5% OFF DEVIL'S HARVEST

5% OFF FEMALE SEEDS

5% OFF CROCKETT FAM FARMS

Featured Latest Story

Previous Stories

Strains Of The Month

Community Poll

Recently Viewed

Featured Strains

Critical Mass Collective Cannabis Seeds: improving upon perfection.

Critical Mass is a weed seed strain famous throughout the entire 420 world for its huge yields, fearsome power and vigorous growth. But even the best strains can be improved upon.

Critical Mass Collective: genetics of mass production.

Newsletter