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Grass-O-Matic Autoflowering Cannabis Seeds

No exceptions here. Every Grass-O-Matic cannabis seed is autoflowering and feminized, because this was one of the first seedbanks built entirely around autos, and Zamnesia currently stocks its flagship Auto Mass with fast, discreet UK delivery. One strain, zero light schedules, a fixed clock of 9 to 10 weeks.

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Auto Mass (Grass-O-Matic)

Auto Mass (Grass-O-Matic) Feminized

Seed to harvest in 9 weeks: One of the fastest routes from seeds to harvest available.Critical Mass x Lowryder lineage: Afghani-Skunk density meets ruderalis speed in one compact cross.Tough by nature: Mould and pest resistant, this strain handles difficult conditions without fuss.Resin-heavy central...

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Grass-O-Matic

The essentials first, then the story:

StrainGeneticsSeed to harvestCharacter
Auto MassCritical Mass x Lowryder9 to 10 weeksEasy, compact, mould and pest resistant

Who Are Grass-O-Matic?

Grass-O-Matic staked its name on autoflowers back when they were still a curiosity, becoming one of the first seedbanks to work on nothing else. The catalogue has always been 100% autoflowering and feminized, aimed at growers who value a sure, simple harvest over novelty.

What Makes Grass-O-Matic Seeds Different

Speed and sturdiness over spectacle. Auto Mass keeps a low profile, roughly 90 cm outdoors, resists mould and pests, and needs no light schedule at all. It is the kind of plant you can trust to a British summer.

Auto Mass: the One We Stock

Fair warning rather than fine print: our Grass-O-Matic shelf currently holds exactly one strain. Auto Mass blends Critical Mass, an Afghani x Skunk 1 classic, with Lowryder, the strain that started the whole autoflower movement. Dense indica buds, a strong physical effect, and around 100 g per plant outside.

Growing Grass-O-Matic Autoflowers

Sow it, water it, wait 9 to 10 weeks. No photoperiod juggling, no drama indoors or out, which makes this an honest first grow as much as a low-effort repeat one. The ruderalis heritage from the Lowryder side does the timekeeping for you, and the buds finish visibly resinous with an earthy, hash-adjacent aroma. One honest footnote: the breeder publishes no THC figure, rating the effect simply as strong.

Buying Grass-O-Matic Seeds in the UK

Order at Zamnesia and Auto Mass arrives fresh, fast and discreetly packaged.

Grass-O-Matic: Questions & Answers

Who are Grass-O-Matic?
One of the first seedbanks built entirely around autoflowers. Every seed in the catalogue is autoflowering and feminized.
What is the best Grass-O-Matic strain?
At Zamnesia we stock the flagship: Auto Mass, a Critical Mass x Lowryder cross that is easy, compact and ready 9 to 10 weeks from seed.
Can I grow Auto Mass outdoors in the UK?
Yes. It stays around 90 cm, resists mould and pests, and its fixed 9 to 10 week cycle fits a British summer.
Are there regular or photoperiod Grass-O-Matic seeds?
No. The brand only breeds autoflowering, feminized seeds.