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Grapefruit Seeds seed pack
FeminizedBeginnerTHC 19%Sativa Dominant

Grapefruit Seeds

Bright citrus flavor, beginner-friendly, reliably high yields

$41.65 – $135.157 pack sizes — choose at ILGM

Buy at ILGM

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Our take

Grapefruit is a feminized, photoperiod sativa dominant strain bred from Cinderella 99 and a sativa landrace, carrying a genuine burst of citrus and sweet grapefruit in both aroma and flavor. At 19% THC it sits in a comfortable middle range—lively and social without being overwhelming. It's a solid pick for first-time growers who want a forgiving plant that still delivers generously.

Yields up to 510 g/m² indoors after a 63-day flower cycle
Good natural resistance to common diseases, reducing day-to-day management stress
Finishes outdoors in late September to early October, fitting most temperate and Mediterranean climates

Grow specs

GenotypeSativa Dominant
THC19%
CBD levelLow
EffectsEnergetic, Talkative, Uplifted
Taste & aromaCitrus, Grapefruit, Sweet
Dominant terpenesCaryophyllene, Myrcene, Pinene
Grow difficultyBeginner
ClimateOutdoor, Indoor, Sunny, Continental, Mediterranean
Flowering (indoor)63 days
Harvest (outdoor)Late September to early October
Yield potential510 gr/m²
Plant heightTall
Bud structureAverage Density, Medium Density, Medium Size, Elongated
ResilienceDiseases
Optimal temp65-80°F
Optimal humidity55-65%
LineageCinderella 99 x unnamed sativa landrace
Genetics byFemale Seeds

Specs are ILGM'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 is rated beginner-friendly and adapts well indoors or out, preferring sunny, continental, or Mediterranean conditions. Plan for a tall plant and give it vertical room. Indoor flowering wraps up around 63 days. Outdoor harvests land in late September or early October. Its above-average disease resistance means fewer interventions during the grow, which new growers will appreciate.

New to growing? Start with the complete guide, plan your gear with tent setups, and diagnose problems with troubleshoot.

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