Guava Runtz Auto

Guava Runtz Auto is a FastBuds F1 made from Guava Auto RF3 x Mango Runtz F5 Auto, available as feminised autoflowering seeds. It’s built around modern auto performance, strong terpene expression and a balanced 50% sativa, 50% indica profile.

The parent lines give this one its interest. Guava Auto RF3 is a fully stabilised FastBuds line and a champion from the latest Autoflower World Cup. Mango Runtz, from Mephisto Genetics, is a multiple award-winning hybrid known for terpene quality and a very compact structure. FastBuds brought them together to combine Guava’s freshness and growth energy with the tighter Mango Runtz frame.

THC is listed at up to 30%, with CBD below 1%. That puts Guava Runtz Auto among the stronger modern autos in the FastBuds range, with the terpene profile doing plenty of the talking too.

The smell and taste are full-on fruit shop sweet: tropical fruit, guava and candy notes, backed by a deeper layered aroma. FastBuds notes that this character carries well from flower through to the finished product, so it should appeal to collectors who pay close attention to aroma, jar appeal and flavour character.

Two main phenotypes are reported. Both share a similar terpene profile, dense bud formation and a consistent overall structure. One turns deep black, while the other stays greener for longer and develops darker tones near the end of the cycle. So there’s some visual variety, but not a big split in the core aroma or growth pattern.

Plants are classed as XXL for an autoflower and usually sit around 70–120 cm. Flowering time is 8–9 weeks. Guava Runtz Auto can be grown indoors, outdoors, in a greenhouse or under mixed lighting, with listed harvests of 450–600 g/m² indoors and 60–300 g per plant outdoors. The climate guidance covers very hot, hot, moderate and cold conditions, with the strongest fit in very hot, hot and moderate settings.

Choose Guava Runtz Auto if you want a current-generation FastBuds auto with exact award-winning parentage, high THC potential, dense flowers and a loud tropical candy profile rather than a low-key, subtle smoke.