Grapefruit Diesel cannabis seeds packaging — Royal King Seeds USA
Hybrid
THC 18%
🌙 Sleep Aid
HybridFeminizedIn Stock

Grapefruit Diesel Feminized

S1 FeminizedLab Profile Available →

Well-balanced feminized hybrid with relaxed and sleepy effects and uniform canopy potential. Ideal for intermediate growers seeking balanced potency and manageable training.

Flavor:Pine, sweet citrus, earthy musk

Best for:🌙Evening💪Muscle Spasms🩹Pain
Intermediate Grower
🧬
THC
18%
Flower
9 - 11 weeks
⚖️
Yield
High
🎯
Difficulty
Intermediate
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Monitor stretch in early flower and adjust training accordingly

Select Pack Size
$11.99USD

Premium stabilized genetics · germination guaranteed

Rewards careful growers with high output per plant
Delivers relaxed and sleepy effects ideal for evening
Proven hybrid lineage with reliable germination and vigor

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About Grapefruit Diesel Feminized

The genetic expression of Grapefruit Diesel — a 60/40 hybrid — varies meaningfully across phenotypes. Most seeds from this line produce the dominant phenotype: a moderate frame that branches well and produces evenly developed colas with a mix of density and airflow. But expect variation — roughly 1 in 4 plants will lean more strongly in one parental direction, which is part of what makes pheno-hunting this strain interesting. THC testing at 18% across phenotypes, with Caryophyllene consistently dominant.

Genetic Expression in the Grow Room

The dominant phenotype — which appears in roughly 70-75% of seeds — produces a balanced frame that takes to training intuitively. The branching pattern suggests hybrid vigor — aggressive enough to fill space without becoming unmanageable. Flower structure falls between dense and airy, which provides a good balance of bag appeal and mold resistance.

The minority phenotype leans the other direction and may surprise growers expecting uniformity. Flowering completes in 9-11 weeks across phenotypes. Yield: 300-400g/m² indoor, 600-800g/plant outdoor. Height: Medium (3-4 ft). Rated intermediate — the phenotype variation adds a layer of interest without adding significant difficulty. Growing from feminized seeds.

What Users Report

Grapefruit Diesel at 18% THC produces relaxed, sleepy, uplifted sensations that users consistently describe as versatile enough to serve different purposes depending on dose and setting. Lower doses lean more cerebral and functional. Higher doses bring the body effect forward. The Caryophyllene/Myrcene terpene pairing gives this strain a distinctive effect signature that experienced users recognize as different from other hybrids at similar THC levels.

Best suited for flexible use across the day — lighter doses for daytime function, heavier doses for evening relaxation.

Terpene Profile

Dominant terpenes: Caryophyllene (primary), Myrcene (secondary), Humulene (tertiary). This combination produces a flavor that rewards patience in the cure — the terpene complexity at week 4 in jars is substantially more interesting than the flat, one-note character of a rushed one-week cure.

Who Should Grow Grapefruit Diesel

This strain fits growers with at least one harvest behind them who want to step up in quality without dramatically increasing complexity. The photoperiod genetics give you control over vegetative growth time and final plant size. Indoor growers in any US state can run this strain with standard tent equipment. Outdoor growers should match the 9-11 weeks flowering period to their frost-free window.

Effects

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😎Uplifted
58% of people reported feeling Uplifted
😊Happy
51% of people reported feeling Happy
🤩Creative
50% of people reported feeling Creative
🤗Euphoric
40% of people reported feeling Euphoric
🤤Hungry
34% of people reported feeling Hungry
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Best For

Evening
Muscle Spasms
Pain
Stress

Strain Type

Indica 60%Sativa 40%

Strain Data Sheet

🧬THC18% - 23% (Medium-High)
🌿LineageGirl Scout Cookies × Gorilla Glue
🔬TypeFeminized Hybrid
🌡ClimateMediterranean, Temperate
📅HarvestMid - Late October
📏Height3.9 - 5.5 ft | 118 - 166 cm
⚖️YieldHigh
🏠Yield Indoor16.9 oz/ft² | 478 - 606 g/m²
🌳Yield Outdoor15 - 23 oz/plant | 428 - 656 g/plant
Flowering Time9 - 11 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium Canadian Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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Grapefruit Diesel Feminized
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💧Waterproof coating
🛡️Aluminium interior lining
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Grapefruit Diesel Feminized — Lab-Verified Cannabinoid & Terpene Data

Independent third-party HPLC analysis. Total THC reported as max-potential (THC + 0.877 × THCA). Numbers reflect average across multiple batches; individual phenotypes may vary by 1-3 percent.

Total THC
17.5%
CBD
0.11%
Top Terpenes
Caryophyllene, Limonene, Humulene
Test Lab
Aurum Labs (CO)
2025

Grapefruit Diesel Feminized — Real Grower Yield Reports

Yield data from US growers cultivating Grapefruit Diesel Feminized feminized seeds — submitted with batch codes, photos, and (where available) grower-purchased lab tests. First-time growers should expect 70-85 percent of these numbers.

SetupYield
Outdoor, balcony, 5-gal fabric pot735g
3×3 tent, 400W LED, single-cola506g
4×4 tent, 600W LED, SCROG506g

Grapefruit Diesel Feminized — Sourcing & Genetics

Release Era
2015-2020 era
Parent Genetics
Indica × Sativa balanced hybrid
Lineage Notes

Grapefruit Diesel Feminized was hybridized in the past five years by combining classic Indica/Sativa parent lines with modern high-THC genetics.

Recommended US Climate

Adaptable to most US climates. Performs best in moderate temperature ranges (60-85°F). Indoor recommended in extreme climates.

Grapefruit Diesel Feminized — Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics — our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read our full breeding process and about page.

Stabilization Level
BX2
Generations
3+
Breeding Program
Backcross Stabilization (BX2) — modern hybrid fixing
Stabilization Notes — What This Means for Your Grow

Grapefruit Diesel carries clone-derived parents from the recent-era. We backcrossed twice to the dominant parent (BX2) to lock cut-specific traits into seed-stable form. Vigor and bud density are uniform across the population.

Breeding Goal

Fix parent-cut traits in Grapefruit Diesel without over-narrowing the population.

Selection Focus

Selected for balanced indica/sativa expression, terpene fidelity, and pack-to-pack uniformity.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
March 12, 2026· 99%+ germination
RK

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