
Free Seeds With Every Order
Choose your free strains, no mystery seeds. Learn more
Opium Feminized
Potent feminized hybrid with euphoric and calm effects and moderate stretch and sturdy branching. Ideal for intermediate growers seeking flavor depth and consistent results.
βFlavor:Citrus, sweet fruit, herbal earth
Grower tip: Top once at node 5β6 for a balanced bush structure
Premium stabilized genetics Β· germination guaranteed
Ready to grow this strain?
Free Seeds With Every Order
Choose your free strains, no mystery seeds. Learn more
About Opium Feminized
The genetic expression of Opium, a 62/38 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 21% across phenotypes, with Myrcene 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: 350-450g/mΒ² indoor, 500-700g/plant outdoor. Height: Tall (4-5 ft). Rated intermediate, the phenotype variation adds a layer of interest without adding significant difficulty. Growing from feminized seeds.
What Users Report
Opium at 21% THC produces euphoric, calm 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 Myrcene/Limonene 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: Myrcene (primary), Limonene (secondary), Pinene (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 Opium
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
Best For
Strain Type
Strain Data Sheet
Packaging
Feminized Premium
Seeds
authenticity
lining
number
Related Strains

Ancient Kush Feminized
Buy Ancient Kush Feminized cannabis seeds online in the USA. Indica strain with 19% THC. Effects: Relaxed, Sleepy, Happy. Discreet shipping to all 50 states with germination guarantee.

Grape Skunk Feminized
Buy Grape Skunk Feminized cannabis seeds online in the USA. Indica strain with 20% THC. Effects: Euphoric, Creative, Calm. Discreet shipping to all 50 states with germination guarantee.

707 Headband Feminized
Buy 707 Headband Feminized cannabis seeds online in the USA. Sativa strain with 22% THC. Effects: Euphoric, Creative, Uplifted. Discreet shipping to all 50 states with germination guarantee.

Blue Cinex Feminized
Buy Blue Cinex Feminized cannabis seeds online in the USA. Sativa strain with 22% THC. Effects: Euphoric, Creative, Focused. Discreet shipping to all 50 states with germination guarantee.
Opium Feminized, Cannabinoid & Terpene Reference
Reference ranges aggregated from publicly-reported third-party lab data and breeder documentation. Total THC reported as max-potential (THC + 0.877 Γ THCA). Individual seed-lot expression may vary by 1-3 percent.
Opium Feminized, Aggregated Grower Yield Reports
Yield ranges aggregated from public grower journals, breeder-documented spec sheets, and cultivation community reports on Opium Feminized feminized seeds. First-time growers should expect 70-85 percent of these numbers.
| Setup | Yield |
|---|---|
| 5Γ5 tent, 730W LED, SCROG | 579g |
| 4Γ4 tent, 1000W HPS, SCROG | 580g |
| 5Γ5 tent, 1000W HPS, ScrOG + topping | 580g |
Opium Feminized, Sourcing & Genetics
Opium Feminized was first stabilized in Amsterdam coffee-shop circles in the 2000s and adapted to American growing conditions through North American breeding programs.
Adaptable to most US climates. Performs best in moderate temperature ranges (60-85Β°F). Indoor recommended in extreme climates.
Opium Feminized, Breeder Information
Royal King GeneticsBred and stabilized in-house by Royal King Genetics , our internal breeding team. Every order is backed by our 95% germination guarantee. Read our full breeding process and about page.
A mid-2010s cross stabilized over four generations of selection. Opium grows true-to-type with the cross-derived trait balance that defines the cultivar.
Eliminate off-type phenos in Opium through filial selection.
Selected for trichome density, bud structure, and the hybrid trait balance the cross was designed to deliver.
Royal King Genetics in-house breeder room, pollen drawn from a generation-tracked sibling-male line.