4523 Reviews You Can Trust!
Ship to: UK
Gyo Seedbank
GYO SEEDBANK
0131 510 4745
Anonymass Auto
Critical Mass Collective Anonymass Auto Feminised Weed Seeds
Read More
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 £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Massassin Auto Feminised Weed Seeds
Read More
Massassin Auto
Critical Mass Collective

Licence to chill.

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Masszar Auto Feminised Weed Seeds
Read More
Masszar Auto
Critical Mass Collective

Masses of magical Mazar.

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Mendo Mass Weed Seeds
Read More
Mendo Mass Auto
Critical Mass Collective

Drive your mates purple with envy!

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Monster Mass Feminised Weed Seeds
Read More
Monster Mass
Critical Mass Collective

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

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Monster Mass Auto Weed Seeds
Read More
Monster Mass Auto
Critical Mass Collective

What’s that coming over the hill…?

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Moonshine Mass Weed Seeds
Read More
Moonshine Mass
Critical Mass Collective

Christ-Mass has come early…

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Psychotropic Mass Feminised Weed Seeds
Read More
Psychotropic Mass
Critical Mass Collective

Amazing medicine with a gorgeously long-lasting high.

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Purple Skunk Mass Feminised Weed Seeds
Read More
Purple Skunk Mass
Critical Mass Collective

A group of fine genes swollen by the Monster Mass.

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Sour Melon Mass Weed Seeds
Read More
Sour Melon Mass Auto
Critical Mass Collective

A genetic force to be reckoned with.

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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 Super Mutant Mass Weed Seeds
Read More
Super Mutant Mass
Critical Mass Collective

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

RRP £0.00

Your Price

£0.00

Club Price

£0.00

GYO Club Saves

£0.00

RRP £23.46

Your Price

£23.21

Club Price

£20.89

GYO Club Saves

£2.32

RRP £37.62

Your Price

£37.22

Club Price

£33.50

GYO Club Saves

£3.72

RRP £67.72

Your Price

£67.01

Club Price

£60.31

GYO Club Saves

£6.70

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
loading

Strains Of The Month

Pineapple Chunk
Barneys Farm
£0.00
Pineapple Chunk
Sex Feminised
Type Mostly Indica
Flowering 6-8 weeks
Black Diesel
Advanced Seeds
£0.00
Black Diesel
Sex Feminised
Type Mostly Sativa
Flowering 8-10 weeks
Bubblelicious
Nirvana Seeds
£0.00
Bubblelicious
Sex Feminised
Type Mostly Indica
Flowering 8-10 weeks
Critical Impact
Vision Seeds
£0.00
Critical Impact
Sex Feminised
Type Mostly Indica
Flowering 8-10 weeks

Community Poll

Which seeds do your normally buy?

Recently Viewed

Featured Strains

Big Bomb
Big Bomb
£2.36
Bomb Seeds
£2.36
Big Bomb
Sex Regular
Type Indica / Sativa
Flowering 8-10 weeks
Zamaldelica
Zamaldelica
£4.40
Ace Seeds
£4.40
Zamaldelica
Sex Regular
Type Sativa
Flowering 12-14 weeks
Caribe
Caribe
£4.80
Cannabiogen Seeds
£4.80
Caribe
Sex Regular
Type Sativa
Flowering 10-12 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.

REFINE SEARCH