Guava Runtz Auto™
Up to 30% THC in just 8–9 weeks
$15.00 – $2399.0010 pack sizes — choose at Fast Buds
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Use code HGAPP at Fast Buds checkout for 15% off.
15% off with code HGAPP · US store with fast domestic shipping · Discreet packaging
Rated 5/5 by 16 verified Fast Buds customers
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Our take
Guava Runtz Auto is a 50/50 hybrid from Fast Buds that crosses Guava Auto RF3 with Mango Runtz F5 Auto, producing an F1 feminized autoflower with up to 30% THC and a distinctly tropical, sweet guava aroma. It suits growers who want a high-potency plant without managing light schedules — from first-time autoflower growers to experienced hands looking for serious yields.
Grow specs
Specs are Fast Buds's published figures for this product; catalog and pricing last verified August 2026. Our write-up is our own — see how we make money.
Growing notes
Guava Runtz Auto works indoors, outdoors, in a greenhouse, or under mixed light — a flexible fit for most home setups. Plants finish in 8–9 weeks from seed with no light-schedule adjustment required. Expect heights between 28 and 47 inches, so plan vertical space accordingly. Beginner-friendly as an autoflower, though its XXL size and high-potency potential reward growers who dial in feeding and airflow.
New to growing? Start with the complete guide, plan your gear with tent setups, and diagnose problems with troubleshoot.
Want variety instead?
Mix packs bundle three proven strains (30 seeds) at up to 50% off buying separately — the best value in the catalog.
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