Grapefruit cannabis seeds - product photo

Grapefruit Seeds

Citrus-Powered Sativa Energy From Legendary C99 Genetics

Grapefruit seeds deliver a bright, energetic sativa experience rooted in Cinderella 99 lineage, one of the most respected genetic foundations in the cannabis world. With THC levels sitting between 15-19%, this strain hits a sweet spot: potent enough to satisfy experienced users, accessible enough to avoid overwhelming newcomers to sativa-dominant effects. If you're looking to buy Grapefruit seeds with verified C99 heritage and solid indoor and outdoor yield potential, the options available today make this one of the more compelling sativa purchases on the market.

Autoflower vs. Feminized: Which Grapefruit Seed Type Fits Your Grow?

Seed TypeFlowering TimeYieldBest For
Feminized8-10 weeks350-450g/m² indoors / 400-500g/plant outdoorsGrowers prioritizing maximum yield and full expression of C99 sativa genetics
Autoflower8-10 weeks from seedTypically 300-400g/m² indoorsGrowers wanting faster turnaround, discreet grows, or multiple cycles per season

Feminized seeds are the right call if you want the full genetic expression of Grapefruit's Cinderella 99 lineage. The photoperiod format gives you more control over vegetative development, which matters with a sativa-dominant strain that can stretch during flowering. Growers chasing the upper end of that 450g/m² indoor ceiling will get there more reliably with feminized seeds, and the outdoor yield potential of 400-500g per plant makes this format particularly attractive for warm-climate outdoor grows.

Autoflower seeds trade some yield ceiling for convenience and speed. At 8-10 weeks from seed to harvest, Grapefruit autos complete on a timeline comparable to the feminized version but without any light schedule dependency. For growers running multiple harvests per year or working with limited space, the auto format keeps things simple without sacrificing the citrus-forward sativa character that makes this strain worth growing in the first place. Currently, Seedsman is the primary source for Grapefruit autoflower seeds, while feminized seeds are available across a wider range of seedbanks.

Grapefruit Seeds: Quick Specs

Strain TypeSativa
LineageCinderella 99
THC Content15-19%
CBD Content0.1-0.5%
Flowering Time8-10 weeks
Indoor Yield350-450g/m²
Outdoor Yield400-500g/plant
Growing DifficultyModerate
Available Seed TypesAutoflower, Feminized

Where and How to Buy Grapefruit Seeds

Six seedbanks currently carry Grapefruit seeds for sale, giving buyers a solid range of options to compare. ILGM, Crop King Seeds, Herbies Seeds, MSNL, and Seed City all stock feminized seeds, making the feminized format easy to source and price-compare across vendors. If you're specifically after autoflower seeds, Seedsman is currently the only seedbank in this group offering the auto version of Grapefruit, so that narrows your decision quickly. Crop King Seeds typically offers germination guarantees with their feminized packs, which is worth factoring in given Grapefruit's moderate grow difficulty. Herbies Seeds and Seed City both tend to stock multiple pack sizes, so bulk buyers looking to run several plants can often find better per-seed pricing there than at single-pack-focused retailers.

Payment options vary across these six seedbanks. MSNL and Seedsman both accept cryptocurrency payments, which usually come with a discount on top of the listed price. For buyers purchasing Grapefruit feminized seeds from ILGM, their germination guarantee is strain-specific and covers replacement seeds if germination fails under documented conditions. Given that Grapefruit's C99 genetics command a slight premium over generic sativa seeds, verifying what germination protection is included before checkout is a practical step. Stealth shipping is standard at most of these seedbanks for international orders, though Seed City and Herbies Seeds are particularly well-regarded for discreet international delivery.

On value, Grapefruit seeds sit in a mid-range price bracket that reflects both the C99 lineage and the strain's consistent demand. Compared to other moderate-difficulty sativas at similar THC levels, the 400-500g outdoor yield potential per plant makes the feminized format a strong value proposition, especially for outdoor seeds buyers in suitable climates. For indoor seeds buyers, the 350-450g/m² ceiling is competitive within the sativa category, where many strains sacrifice yield for potency. The 15-19% THC range also means you're not paying a premium for ultra-high-THC genetics you may not need, making Grapefruit one of the more sensibly priced C99-derived strains currently available across these seedbanks.

Grapefruit Seeds: Frequently Asked Questions

What's the difference between Grapefruit Autoflower and Feminized seeds?

The core difference comes down to sourcing and flexibility. Grapefruit feminized seeds are available from five seedbanks including ILGM, Crop King Seeds, Herbies Seeds, MSNL, and Seed City, giving you more options to compare pricing and pack sizes. Autoflower seeds for Grapefruit are currently exclusive to Seedsman. In terms of what you're buying genetically, the autoflower version is bred for light-independent flowering and completes in 8-10 weeks from seed, while the feminized version follows a photoperiod cycle with the same 8-10 week flowering window once triggered. If seedbank selection and pack size variety matter to your purchase decision, feminized is the more flexible option right now.

What THC level can I expect from Grapefruit seeds?

Verified Grapefruit genetics test between 15-19% THC. This range places it firmly in the moderate-to-high category for a sativa-dominant strain, without pushing into the 25%+ territory that some buyers find excessive. When purchasing, look for seedbanks that provide lab-tested or breeder-verified THC data rather than unsubstantiated marketing claims. The C99 lineage behind Grapefruit has a well-documented genetic profile, so reputable seedbanks like Seedsman and Herbies Seeds selling this strain should be able to back up the THC figures with breeder documentation.

How much CBD does Grapefruit contain?

Grapefruit carries 0.1-0.5% CBD, which is typical for a THC-forward sativa and not a figure that positions it as a high-CBD seeds option. Buyers seeking meaningful CBD content for specific wellness applications should look at dedicated CBD strains rather than Grapefruit. That said, the trace CBD present contributes to the overall cannabinoid profile alongside the 15-19% THC. If CBD certification matters for your purchase, contact the specific seedbank directly before ordering, as not all vendors provide third-party CBD lab results for this strain.

Where can I buy Grapefruit seeds online?

Grapefruit seeds are available from six seedbanks: Seedsman, ILGM, Crop King Seeds, Herbies Seeds, MSNL, and Seed City. For feminized seeds, all six carry the strain, so comparing price per seed across vendors is straightforward. For autoflower seeds, Seedsman is currently your only option within this group. ILGM and Crop King Seeds are strong picks if germination guarantees are a priority. Herbies Seeds and Seed City suit buyers looking for flexible pack sizes or bulk pricing. All six ship internationally, though shipping terms, payment methods, and promotional discounts vary, so checking each seedbank's current listings before placing an order will get you the best deal on Grapefruit seeds for sale.

Where to Buy Grapefruit Seeds

Also available at: Seedsman, ILGM, Crop King Seeds, Herbies Seeds, MSNL, Seed City

Links go directly to seedbank product pages.