Grass-O-Matic

Original Pioneers of Autoflowering Cannabis Genetics

One of the First — Still One of the Best

Grass-O-Matic helped shape the modern autoflowering scene long before it was mainstream. Known for precision breeding and unmatched reliability, they were among the first to bring high-quality, fast-finishing automatic genetics to serious collectors around the world.

Each strain from Grass-O-Matic is carefully developed to deliver stability, potency, and efficiency — proof that great things come in small packages. Their legacy continues to influence the next generation of auto breeders globally.

Collect authentic Grass-O-Matic seeds today — classic autoflowering excellence, only at Rhino Seeds.

Autoflowering Pioneers
Fast, Reliable Genetics
Expert Breeding Heritage
Consistent Performance & Quality
Available Now at Rhino Seeds

Grass-O-Matic cannabis seeds – pioneering autoflowering genetics with fast, stable and reliable performance

MaxiGom

Maxi Grass-O-Matic feminised seeds for the heaviest yielding automatic plants. Get Maximum Yields from Grassomatic's new Maxi strain.Can be subject to bud rot or mould if ventilation is not great due

From £43.79

Buy Now
MixGOM AutoFem Package

**** DISCONTINUED ****
Powerful things really do come in small packages! To find out for yourself, check out Grass-O-Matic’s MixGOM AutoFem collection. With 10 autoflowering cannabis seeds, MixGOM AutoFem reveals the magic of autoflowering genetics.

Out of stock
SugarGOM AutoFem

Bursting with sweetness and sprinkled with sugary THC crystals, SugarGOM AutoFem is one of the tastiest marijuana seeds we’ve ever tried. And, she smells great, too! SugarGOM AutoFem changes from a st

Out of stock
Auto Mass

This is Automatic Critical Mass - A fruitilicious high yielding auto from grassomatic! The buds form Auto Mass are rock hard, and have a complex aroma! - Apparently Auto Mass has 2 phenotypes, each w

Out of stock