Fast Buds
Autoflower · Hybrid
Next-gen autoflower bred from 2025 Cannabis Cup winners — Guava Auto RF3 x Mango Runtz F5 Auto — delivering explosive tropical terps and XXL yields.
Select pack size:
Aroma & Flavour
Guava Runtz Auto™ is a next-generation autoflower built from two proven winners. On one side, Fast Buds' Guava Auto RF3: a fully stabilized line and champion of the latest Autoflower World Cup. On the other, Mango Runtz (Mephisto Genetics): a multiple award-winning hybrid renowned for its terpene quality and compact structure.
This F1 hybrid cross was engineered to unite elite performance and terpene expression in a single line. Early testing reveals strong hybrid vigor, blending the manageable structure of Mango Runtz with the added strength, freshness, and growth energy of Guava RF3.
The terpene profile is intense and forward — tropical fruit, sweet candy notes, and a deep, layered aroma that translates beautifully from flower to final product with exceptional bag appeal.
The line expresses two main phenotypes:
Both phenotypes are vigorous, with dense bud formation and consistent structure across the population. Guava Runtz Auto™ is designed for growers seeking the front edge of modern autoflower breeding — combining stability, terpene depth, and performance in one line.
| Genetics Type | Autoflower |
| Variety | Hybrid |
| Lineage | Guava Auto RF3 x Mango Runtz F5 Auto |
| THC Content | from 22.0% |
| CBD Content | up to 1.0% |
| Flowering Time | 8 – 9 weeks weeks |
| Yield (Indoor) | 450 – 600 g/m² g/m² |
| Yield (Outdoor) | 2.4 – 9.5 oz/plant g/plant |
| Height (Indoor) | 28 – 47 inches |
| Height (Outdoor) | 28 – 47 inches |
| Climate | Indoor, Outdoor, Greenhouse |
| United Kingdom | £3.95 · Free on orders over £60.00 |
| Europe | £6.99 · Free on orders over £75.00 |
Seeds shipped as collector's items in discreet plain packaging. All orders tracked. Delivery United Kingdom: 2–5 working days · Europe: 5–10 working days.
No reviews yet for this strain.
Bought this? Leave a review from your account →