42 Fast Buds – Guava Runtz Auto
Tropical Terpene-Powered Autoflower from Cup-Winning DNA
Exotic in aroma. Innovative in genetics. A next-gen hybrid with premium terpenes.
The Guava Runtz Auto from 42 Fast Buds is an exciting feminized F1 autoflower hybrid that unites two of the most highly awarded lines in current cannabis breeding. It combines the award-winning Guava Auto RF3 – winner of the Autoflower World Cup – with the multi-award-winning Mango Runtz F5 Auto from Mephisto Genetics to create a powerful, aroma-intensive strain. This championship line aims to combine elite performance with extraordinary terpene notes.
Initial internal test runs show a compact, easy-to-manage growth as well as an intense, tropical-sweet terpene profile of fruity and candy-like notes – perfect for growers who want to experience new standards in autoflower genetics.
What makes this strain special
Championship Line Hybrid with Terpene Fusion
Guava Runtz Auto combines:
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Two Cup Winners: Guava Auto RF3 × Mango Runtz F5 Auto – elite genetics in an autoflower.
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Intense Terpene Profile: Tropical fruit and sweet candy aromas dominate the bouquet.
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Early F1 Release: Strong hybrid vigor with a uniform structure.
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Bag Appeal Potential: Outstanding visual appearance due to dense buds and resinous flowers.
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Ideal for growers looking for top-tier terpenes, flavor depth, and structure in a strain.
This next-gen autoflower is the result of a breeding project that combines the most modern and successful genetics from the cups to create a new premium experience.
Character & Structure
Guava Runtz Auto displays a balanced hybrid structure, which produces a compact, robust plant with high aesthetic presence:
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Feminized · Autoflower
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Compact to medium-high (approx. 80–130 cm)
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Powerful main cola with dense side buds
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Uniform, structured bud development
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Suitable for indoor & outdoor
This balance makes it interesting for both structured indoor setups and controlled outdoor situations.
Aroma & Taste
The terpene profile of Guava Runtz Auto is rich, fruity-sweet, and exotic:
Already upon opening, it reveals a seductive bouquet that defines the grow space and delivers an intense flavor profile when consumed.
Grow Tips
Guava Runtz Auto is easy to care for and consistent, but benefits from targeted maintenance:
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pH-regulated watering (approx. 5.8–6.8) recommended
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Light defoliation can improve light penetration and bud development
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Stable airflow promotes resin production
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Harvest after approx. 9–10 weeks, once the trichomes are predominantly milky
The compact structure ensures easy handling and robust growth.
⚠️ Legal Disclaimer
Cannabis seeds are sold exclusively as collectible and breeding material. Germination and cultivation are permitted only where consistent with applicable law.