GMO Auto Seeds by Fast Buds
GMO Auto by Fast Buds is a welcome change of direction from the sweeter autoflower genetics that have dominated the breeder’s catalogue for years. Instead of cherry, banana, candy or Sherbet, this one goes straight for garlic, onion, earthy mushroom and Diesel.
The genetics combine a California-sourced GMO Cut × Chemdog Auto, with Fast Buds working the resulting line through to F4.
The finished GMO Auto is a feminized autoflower with approximately 80% Indica and 20% Sativa genetics, THC reaching up to 28%, and a cycle of around 10–11 weeks.
At SeedMasters.com, what interests us most is that Fast Buds hasn’t tried to make GMO more approachable.
Quite the opposite.
The breeder specifically selected for the weird, savoury funk that made GMO famous in the first place.
GMO Cut x Chemdog Auto
Fast Buds started this project with an original GMO clone sourced in California.
Rather than simply crossing it with a generic autoflowering line, the breeder chose Chemdog Auto. Considering the pungent Chem influence already associated with GMO, that’s a pairing that makes a lot of sense.
The goal was to retain as much of the original GMO personality as possible while developing it into a consistent autoflowering line.
Fast Buds says sweetness was actually something it selected against during the breeding process. Plants drifting too far towards sweet terpenes were passed over in favour of those showing stronger garlic, onion, mushroom and Diesel characteristics.
That’s a detail we really like.
Sometimes breeding is about making flavours more universally appealing. GMO Auto seems to have been about doing the exact opposite.
Garlic, Onion, Mushroom and Diesel
There isn’t much fruit to talk about here.
Fast Buds describes the profile around:
Garlic
Onion
Earthy mushroom
Diesel
Herbs
Spice
Savoury funk
And that’s precisely the point.
GMO has always been associated with strange savoury terpenes, and Fast Buds has made preserving that character the central purpose of this release.
Garlic and onion provide the sharpest notes, with mushroom adding an earthy depth underneath. Diesel gives everything a familiar Chem-style pungency, while herbal and spicy notes round out the profile.
At SeedMasters.com, we’d put GMO Auto at almost the opposite end of the Fast Buds flavour spectrum from something like Banana Guava Auto.
One is creamy, sweet and tropical.
This one sounds like somebody opened the kitchen cupboard after filling up at a petrol station.
It won’t appeal to everyone – and that’s probably why it stands out.
An Award on Launch Day
GMO Auto didn’t have to wait long for competition recognition.
Fast Buds officially launched the strain at Mary Jane Berlin in 2026. On that very same day, a test phenotype took 3rd Place – Best New Autoflower at the Autoflower World Cup 2026.
That’s a pretty remarkable introduction.
Fast Buds has since highlighted GMO Auto as an important release because it represents a move beyond the fruit, candy and dessert profiles that became closely associated with the breeder over the previous decade.
Rather than another variation on that formula, GMO Auto opened up a noticeably funkier side of the Fast Buds catalogue.
Up to 28% THC and Heavy Resin
Fast Buds currently lists GMO Auto at up to 28% THC, with CBD below 1%.
The genetic balance is strongly Indica leaning at 80% Indica / 20% Sativa, and the breeder describes its overall character as better suited to slowing things down than staying highly active.
Resin is another major part of the strain’s identity.
Fast Buds specifically highlights GMO Auto for its sticky, resin-rich flowers and describes it as a strong representation of the original GMO character rather than an attempt to produce the densest flowers possible.
In fact, the slightly more open flower structure was a deliberate breeding decision. Fast Buds says it prioritised terpene quality and authenticity to the GMO parent over simply selecting for maximum density.
That’s another small detail that tells you quite a lot about what this project was trying to achieve.
GMO Auto at a Glance
Breeder: Fast Buds
Genetics: GMO Cut × Chemdog Auto
Generation: F4
Seed Type: Feminized Autoflower
Indica / Sativa: 80% Indica / 20% Sativa
THC: Up to 28% according to Fast Buds
CBD: Less than 1%
Cycle: Approximately 10–11 weeks
Size Classification: XL
Aroma: Garlic, onion, mushroom and Diesel
Flavour: Earthy, garlic, herbal and spicy
Appearance: Sticky, resin-rich flowers
Character: Strong, long-lasting and relaxing
Notable Trait: Selected specifically to retain classic savoury GMO terpenes
Award: 3rd Place – Best New Autoflower, Autoflower World Cup 2026
Our Take on GMO Auto
At SeedMasters.com, this might be one of the most interesting Fast Buds releases we’ve covered recently simply because it refuses to taste like everything else.
Banana Cherry Cookies Auto is sweet and fruity.
Banana Frost Auto goes creamy.
Banana Guava Auto heads straight towards tropical fruit.
Then GMO Auto walks in smelling of garlic, onions, mushrooms and Diesel.
We like that.
More importantly, the unusual profile isn’t an accident. Fast Buds deliberately went looking for the strongest savoury expressions during selection and rejected plants that became too sweet. Taking the line through to F4 also shows considerably more development than some of the breeder’s newer first-generation Champions Line crosses.
The competition result is a nice bonus too. Taking third place in the Best New Autoflower category on its launch day certainly wasn’t a bad way to introduce the strain.
But for us, GMO Auto doesn’t need an award to make its case.
It’s interesting because Fast Buds could easily have produced another sweet, crowd-pleasing autoflower and chose not to.
For collectors browsing the SeedMasters.com Fast Buds range, we’d pick GMO Auto specifically because it’s the odd one out.
Garlic. Onion. Mushroom. Diesel.
If you’re tired of reading the words candy, cherry and tropical fruit, you’ve found the right product page.
GMO Auto cannabis seeds sold by SeedMasters.com are intended strictly as adult collectible souvenirs and for genetic preservation purposes only. Please check and comply with the laws applicable in your country or region before purchasing.
