Banana Guava Auto Seeds by Fast Buds
Banana Guava Auto by Fast Buds brings together two award-winning autoflower lines in a tropical F1 hybrid built around guava, creamy banana and sweet fruit.
The genetics are Guava Auto RF3 × Banana Jealousy RF3, and there’s a good reason Fast Buds describes this as a “Champion Cross”. Guava Auto RF3 took 1st Place Best Sativa, while Banana Jealousy took 1st Place Best Indica at the same Autoflower World Cup.
That’s quite a starting point.
The finished Banana Guava Auto is listed as 65% Indica and 35% Sativa, with THC reaching up to 28%. Fast Buds classifies it as an F1 Hybrid Feminized Autoflower, with a flowering period of approximately 9–10 weeks.
At SeedMasters.com, though, it’s the flavour combination that caught our attention first. Guava already has a fairly distinctive tropical character. Add creamy banana to it and you’ve got something much less predictable than another generic fruit strain.
Best Sativa Meets Best Indica
The full cross is:
Guava Auto RF3 × Banana Jealousy RF3
Fast Buds created Banana Guava Auto as part of its Champions Line, a project centred around crossing some of the breeder’s most successful competition genetics.
The two parents couldn’t be much better suited to that idea.
Guava Auto RF3 represents a heavily refined version of Fast Buds’ Guava line. Further back, its genetics trace to Gorilla Cookies Auto, Kosher Cake and Tropicana Cookies Auto, with repeated selection eventually producing the RF3 version used here.
Banana Jealousy RF3 brings the other half of the profile, contributing creamy banana terpenes, resin and a stronger Indica influence.
One won Best Sativa.
The other won Best Indica.
Fast Buds decided to put them together.
Simple enough, really.
Tropical Guava Meets Creamy Banana
Banana Guava Auto isn’t trying to hide what it tastes like.
Fast Buds describes the terpene profile around:
Tropical guava
Ripe banana
Cream
Mixed tropical fruits
Sweet fruity notes
Guava leads the brighter side of the profile. It’s tropical, fresh and slightly exotic without falling into the usual mango or pineapple territory.
Then Banana Jealousy adds a much softer character.
Ripe banana and cream sit underneath the guava, giving the finished flavour a smoother, richer quality.
That’s what we like about the pairing at SeedMasters.com. Guava and banana are both recognisable individually, but they’re different enough to provide some proper contrast when brought together.
Compared with Banana Frost Auto, we’d expect Banana Guava to lean much further into juicy tropical fruit and less towards gas and dessert flavours.
An Early F1 Champions Line Release
There’s another detail worth knowing about Banana Guava Auto.
Fast Buds openly describes this as an early F1 release from its Champions Line.
That means this isn’t being presented as a long-established strain that’s already gone through generation after generation of refinement in its current form. Instead, Fast Buds has taken two heavily selected RF3 parental lines and brought them together as a first-generation hybrid.
We think that’s worth being transparent about.
The parent genetics themselves have been extensively selected, but Banana Guava Auto represents the beginning of a new cross between them.
Fast Buds says the seeds have passed its quality standards and that the new hybrid is continuing through the breeder’s own evaluation programme.
For collectors interested in newer Fast Buds genetics, that makes Banana Guava Auto an interesting snapshot of where its breeding programme is heading in 2026.
Up to 28% THC
Fast Buds currently reports THC reaching up to 28%, with CBD below 1%.
The breeder lists the genetic balance as 65% Indica / 35% Sativa, while reported characteristics include happiness, relaxation, uplift and creativity.
That combination makes sense considering the parents.
Guava contributes the brighter, more energetic side of the pairing, while Banana Jealousy adds greater depth and relaxation.
Fast Buds classifies Banana Guava Auto as XL, with a flowering period of approximately 9–10 weeks.
Banana Guava Auto at a Glance
Breeder: Fast Buds
Genetics: Guava Auto RF3 × Banana Jealousy RF3
Seed Type: F1 Hybrid Feminized Autoflower
Indica / Sativa: 65% Indica / 35% Sativa
THC: Up to 28% according to Fast Buds
CBD: Less than 1%
Flowering Period: Approximately 9–10 weeks
Size Classification: XL
Aroma: Guava, banana and tropical fruit
Flavour: Tropical guava, creamy banana and sweet mixed fruits
Character: Happy, relaxed, uplifting and creative
Notable Background: Best Sativa × Best Indica Autoflower World Cup-winning parent lines
Series: Fast Buds Champions Line
Generation: Early F1 release
Our Take on Banana Guava Auto
At SeedMasters.com, we’re starting to see a clear theme with these new Fast Buds Champions Line strains, and we like it.
Rather than simply reaching for whatever genetics happen to be fashionable, Fast Buds is going back to lines that have already performed well in competitions and seeing what happens when they’re paired together.
Banana Guava Auto might be the clearest example yet.
You’ve literally got a Best Sativa winner crossed with a Best Indica winner.
More importantly, their flavours make sense together.
Guava is juicy, tropical and a little unusual. Banana Jealousy brings creaminess and ripe banana sweetness. Neither completely overwhelms the other on paper, which gives Banana Guava a more interesting identity than simply making an existing strain sweeter.
We also appreciate Fast Buds being upfront about this being an early F1 release. There’s a difference between a new hybrid made from well-worked parents and a strain that’s itself been stabilised over numerous generations, and we’d rather our SeedMasters.com descriptions made that distinction clear.
For collectors looking through the newer SeedMasters.com Fast Buds range, we’d put Banana Guava Auto alongside Banana Frost Auto and Banana Cherry Cookies Auto as three very different takes on the breeder’s Banana Jealousy genetics.
Banana Frost goes creamy and frosty.
Banana Cherry Cookies goes sweet and candy-like.
Banana Guava heads straight for the tropics.
And out of the three, this might have the most interesting parent combination of all.
Banana Guava 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.
