Guava Runtz Auto Autoflower by Fast Buds

Information on Guava Runtz Auto

Now available at Alchimia the seeds Guava Runtz Auto, an F1 hybrid from Fast Buds born from an unprecedented collaboration with Mephisto Genetics under the new Champions Line: a breeding project focused on crossing exclusively winning genetics from the most relevant cannabis cups of recent years. The result is an autoflowering with exceptional lineage, with an aromatic expression that manifests with intensity and uniformity from the first weeks of cultivation.

Cup-winning genetics

Guava Runtz Auto emerges from the cross between Guava Auto RF3 (stabilized version of Fast Buds' Guava Auto), awarded Best Sativa at the Autoflower World Cup 2025 and Mango Runtz F5 Auto from Mephisto Genetics, a strain with multiple cup victories during 2024 and 2025. The latter brings a genealogical tree of great complexity that encompasses names like White Runtz, Gelato, Zkittlez, Mango Haze, Stardawg or Gorilla Cookies Auto, among others. The union of both lineages in an F1 represents an unprecedented event in the Fast Buds catalog and a direct commitment to concentrating maximum genetic potential in a single autoflowering variety.

Cultivation: compact structure and F1 vigor

Indoors, Guava Runtz Auto completes its cycle in 9-10 weeks from germination. Internal observations from the breeder describe a plant with compact and manageable structure, with a marked F1 hybrid vigor that expresses itself from the early stages of development.

Aromas, flavors and effects

Fast Buds describes the fusion of these two parents as the union of two of the most potent terpene profiles in the autoflowering sector. In practice, it translates into a tropical fruit expression of great intensity (with clear prominence of guava and notes of mango) over a base of sugary caramel and candy sweetness that Mango Runtz F5 contributes in depth. First evaluations point to a uniform and consistent aromatic presence throughout the population, with a bag appeal that the breeder qualifies as especially outstanding.

Regarding effects, Guava Runtz Auto produces an experience of hybrid character, coherent with the complexity of its parents.

Specifications on Guava Runtz Auto