Grapefruit Auto
Bright grapefruit flavor, ready in 9–10 weeks
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Use code HGAPP at Fast Buds checkout for 15% off.
From about €9 — see current US pricing at Fast Buds.
15% off with code HGAPP · US store with fast domestic shipping · Discreet packaging
Rated 4.8/5 by 42 verified Fast Buds customers
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Our take
Grapefruit Auto is a balanced sativa-indica autoflower from Fast Buds, bred from Crockett's Tangie crossed with Fast Buds Auto #1. It stands out for its sharp, citrus-forward aroma and up to 20% THC in a seed-to-harvest window of just 9–10 weeks. No light-schedule changes required, making it a solid choice for first-time and returning growers alike.
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
Grapefruit Auto suits indoor, outdoor, greenhouse, and mixed-light setups, giving you real flexibility. Plants finish at 31–47 inches tall — tall enough to be classed XL for an autoflower — so give each one adequate vertical space indoors. The 9–10 week total cycle keeps things moving. Beginner-friendly overall, though the larger canopy rewards growers who do light training to improve light penetration.
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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