Opium cannabis seeds packaging — Royal King Seeds Canada
Hybrid
THC 21%%
HybridFeminizedIn Stock

Opium Feminized

S1 FeminizedSee Lab Report →

Potent feminized hybrid with euphoric and calm effects and moderate stretch and sturdy branching. Ideal for intermediate growers seeking flavor depth and consistent results.

Flavor:Citrus, sweet fruit, herbal earth

Best for:🕐Anytime🛋️Relaxation🧘Stress Relief
Intermediate Grower
🧬
THC
21%
Flower
7 - 9 weeks
⚖️
Yield
Medium - High
🎯
Difficulty
Intermediate
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Top once at node 5-6 for a balanced bush structure

Select Pack Size
$16.09CAD

Premium stabilized genetics · germination guaranteed

Delivers medium-high harvests under balanced light and nutrients
Blends euphoric and calm sensations — perfect for anytime
Premium hybrid genetics refined for home growers

Ready to grow this strain?

1
Thousands of successful grows with this strain
🎁

Free Seeds With Every Order

Spend $42+
1 Free
Spend $105+
5 Free
Best
Spend $280+
15 Free

Choose your free strains — no mystery seeds. View free seed details

🇨🇦Free Shipping
🌱Germination Guarantee
🔒Discreet Packaging
Home-grower favorite — stock moves quickly
Top-rated by Canadian home growers

Royal King Genetics — first-party test batch

Numbers below are from our internal seed-lot QC and verified grower submissions, not breeder marketing. Determined from a single batch tested 2026-03-20 on 150 seeds.

Germination rate: 96.0% (n=150)
Last QC test date: 2026-03-20
Indoor yield: 423-540 g/m² (avg across 15 verified grower reports)
Outdoor yield: 645-836 g/plant (avg across 6 verified grower reports)

About Opium Feminized

Opium Feminized is not the loudest strain on the shelf, and that is exactly why experienced growers keep coming back to it. The hybrid genetics deliver Euphoric effects with a reliability that flashier cultivars cannot match. The Limonene terpene gives every bud a citrus, lemon zest character that anchors the smoke, while sweet and sugar notes round out the profile.

For the numbers: 19-23% THC, 62/38 indica-sativa, photoperiod lifecycle. But numbers only tell part of the story. What matters is how this strain grows in a real Canadian setup — and the answer is dependably. It rewards attention without punishing the occasional off day. That kind of resilience is worth more than a few extra THC points.

Effects & Experience

The Euphoric onset from Opium Feminized does not creep — it announces itself within the first five minutes and sets the pace for everything that follows. At low doses (one or two pulls from a vaporizer), the experience stays functional: a noticeable Euphoric shift paired with mild Calm undertones that let you carry on with your evening or afternoon. Bump the dose up and the undefined quality becomes the center of gravity, pulling you deeper into the hybrid experience.

The intensity curve here is worth understanding. The first 20 minutes bring the cerebral component — a gentle mood lift and slight perspective shift. Then the body catches up, and that is where this strain earns its indica reputation. Physical tension dissolves from the shoulders down, and the urge to move diminishes steadily.

In real use, Opium Feminized works best for evening wind-down sessions, post-workout recovery, or those nights where sleep is the end goal but you want to enjoy the runway getting there. The Calm quality persists through the tail end of the session, and the comedown is clean — no foggy aftermath or next-morning drag. Most users report a total duration of 2-3 hours, though tolerance and consumption method shift that window in either direction.

Flavor & Terpene Profile

Describing the taste of Opium Feminized to someone who has not tried it: imagine leading with sweet, adding a layer of sugar, and finishing with a subtle vanilla note that ties the experience together. That sequence plays out the same way every session, which is part of what makes this strain reliable as a daily driver.

The Limonene terpene is the architect of the flavor. Its citrus, lemon zest character forms the base that everything else sits on. During the growing cycle, this terpene begins expressing around week four of flower and reaches peak intensity in the final days before harvest. Growers who run Opium Feminized notice the shift — the tent goes from smelling generically "planty" to smelling specifically and unmistakably like sweet.

Inhale versus exhale is where the terpene layering becomes apparent. The draw brings sweet cleanly, with moderate smoke density and no harshness. The exhale introduces Caryophyllene (peppery, spicy) and Valencene (orange, citrus) compounds that were masked on the inhale by the dominant Limonene. This layered reveal is what terpene connoisseurs mean when they talk about "complexity" — it is not a buzzword, it is literally the difference between tasting one thing and tasting three.

Why it matters for the experience: Limonene does not just flavor the smoke. It contributes uplifting and energizing properties that shape the Euphoric character of the high. Caryophyllene adds stress-reducing and mood-elevating modulation. The combined result is an entourage effect where the terpenes actively participate in the psychoactive experience rather than sitting passively as flavor compounds.

Curing note: Opium Feminized needs a minimum of three weeks in jars at 60-65% relative humidity before the full flavor develops. We have seen batches where the terpene expression doubled between week two and week five of curing. Patience here is not optional — it is the difference between good flower and great flower.

Growing Opium Feminized in Canada

Opium Feminized is classified as a intermediate-level grow, and that rating holds up in practice. As a photoperiod strain, you control the vegetative period by maintaining 18+ hours of light, then triggering flower by switching to 12/12. Most growers veg for 4-6 weeks, though space-constrained setups can flip earlier with modest yield reduction.

Indoor Performance: Under a quality LED (600-800 PPFD during flower), Opium Feminized reaches 90-150cm and produces 400-550g/m² when given proper conditions. The moderate height allows flexibility in training approach. Both SOG and ScrOG work, though LST combined with one or two toppings tends to produce the best canopy uniformity for this hybrid structure.

Outdoor Performance: In Canadian zones 5b-7a (southern Ontario, BC Lower Mainland, southern Prairies), Opium Feminized needs to be started indoors in April and transplanted outside after the last frost date for your region. Harvest timing is critical — this strain finishes flowering in 8-10 weeks, and Canadian growers need to work backwards from their first expected frost date (typically late September to mid-October depending on location). Outdoor yields reach 450-650g/plant in good conditions.

Height and Stretch: Moderate stretch of 50-80% during the flowering transition. Manageable with standard training, but keep an eye on the top colas reaching too close to the light. This strain reaches its final height of 90-150cm by the end of the stretch phase.

Feeding Sensitivity: Pay attention to nitrogen sensitivity during the flower transition — some phenotypes show tip burn at full-strength veg nutrients. Taper nitrogen during the first two weeks of flower and shift to a bloom-heavy P-K ratio. CalMag supplementation is recommended under LED lighting.

Common Mistakes: The most frequent issue growers report with Opium Feminized is inconsistent watering during flower. This hybrid responds poorly to wet-dry cycles that swing too far in either direction. Consistent, moderate watering is better than feast-or-famine irrigation.

Canadian Climate Notes: Humidity spikes during September and October are the biggest threat to outdoor growers running Opium Feminized. Late-finishing phenotypes may need protection from rain during the final weeks. A simple hoop house or tarp cover can save your harvest from botrytis. Frost tolerance is low — protect outdoor plants if overnight temperatures drop below 2°C. Check our germination guide for detailed techniques. Browse our feminized cannabis seeds and hybrid strains for related genetics.

Opium Feminized — Seed Selection & Storage Tips

Before you start growing Opium Feminized, a few notes on getting the most from your seed purchase and setting yourself up for a successful run.

Seed viability: Cannabis seeds from reputable sources maintain germination rates above 90% when stored correctly. Keep Opium Feminized seeds in their original packaging, in a cool (40-50°F) and dark location until you are ready to germinate. A refrigerator door shelf works well for most growers. Avoid freezing unless you plan to store for more than a year — freeze-thaw cycles can damage the seed coat and reduce germination rates.

Germination method for Opium Feminized: The paper towel method remains the most reliable approach. Place seeds between damp (not soaking) paper towels in a sealed container, keep at 75-80°F, and check every 12 hours. Most Opium Feminized seeds crack within 48 hours, with the taproot emerging by hour 72. Transplant to your starting medium once the taproot reaches 1-2cm in length. Point the taproot downward and cover with 1cm of medium. Check our germination guide for the full step-by-step process.

Selecting the right phenotype: If you pop multiple seeds, look for the plant that shows the strongest structural development during early veg. The one with the thickest stem and tightest node spacing at week two typically becomes the best producer. In packs of 3-5 seeds, running all of them and selecting the best performer for cloning is standard practice for growers who want to optimize subsequent cycles.

Planning your next run: Once you have harvested Opium Feminized, assess what you would change. Did the plants stretch more than expected? Flip earlier next time. Did the flavor disappoint? Extend the cure. Did you see nutrient burn? Reduce feed strength by 15-20%. Every grow cycle teaches something, and Opium Feminized is forgiving enough that the lessons come without catastrophic crop loss. Keeping a simple grow journal — date, action, observation — turns each cycle into a progressively better version of the last.

Companion strains: Growers running Opium Feminized often pair it with a contrasting strain type for variety. Running a pure indica alongside this hybrid gives you a dedicated evening option, while a sativa provides a more energizing alternative. Browse our feminized cannabis seeds for compatible genetics.

Who Opium Feminized Is For

This section is about honest fit. Opium Feminized works well for growers who enjoy the process and consumers who appreciate nuance in their flower. It is a hands-on photoperiod cultivar that rewards deliberate cultivation decisions.

Grower profiles that match: - Home cultivators with standard setups (4-7 feet) running seasonal cycles - Canadian outdoor growers south of zone 4 with enough season for photoperiod flowering - Intermediate to advanced growers looking for a reliable producer

Consumer profiles that match: - Evening users, pain management consumers, sleep seekers - Both newer and experienced consumers (dose-adjustable) - Flavor-forward consumers who prioritize sweet and sugar terpene profiles

Honest disqualifiers: If you want extreme potency, extreme yield, or extreme flavor in one dimension, specialized strains will outperform this balanced hybrid in their area of focus.

How Opium Feminized Compares

Placing Opium Feminized in context against similar hybrid options: High Resin Pack, Birthday Cake Kush Feminized, Midnight Auto occupy the same general space but differ in key areas.

Opium Feminized brings 19-23% THC, a sweet-forward flavor, and intermediate grow difficulty to the table. Where it wins: the terpene profile is more developed than most competitors at this price point, and the Euphoric effects are consistent across seeds and harvests. Where it is matched: yield numbers are in line with category averages. Where competitors may edge ahead: raw potency — growers chasing maximum THC will find higher numbers elsewhere.

Running this as a photoperiod gives you control that autoflower versions cannot offer. Veg as long as your space allows, train aggressively, and push the plant toward its genetic ceiling. The trade-off is time and complexity.

The honest difference: Opium Feminized is not trying to be the loudest, strongest, or highest-yielding hybrid seed available. It aims for consistent, enjoyable quality — and it delivers that reliably. That consistency is its competitive advantage.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😊Happy
51% of people reported feeling Happy
🤩Creative
50% of people reported feeling Creative
😎Uplifted
38% of people reported feeling Uplifted
🤤Hungry
34% of people reported feeling Hungry
😴Sleepy
31% of people reported feeling Sleepy
😆Giggly
24% of people reported feeling Giggly

Best For

Anytime
Relaxation
Stress Relief

Strain Type

Indica 62%Sativa 38%

Strain Data Sheet

🧬THC21% - 24% (High)
🌿LineageChemdawg × Gelato
🔬TypeFeminized Hybrid
🌡ClimateTemperate, Continental
📅HarvestLate September - Early October
📏Height3.7 - 5.5 ft | 112 - 164 cm
⚖️YieldMedium - High
🏠Yield Indoor13.8 oz/ft² | 392 - 534 g/m²
🌳Yield Outdoor19 - 24 oz/plant | 542 - 684 g/plant
Flowering Time7 - 9 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 Canada under the Cannabis Act (2018). Customers are responsible for understanding local laws.
1
Opium Feminized
royalkingseeds.ca
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

Jack Flash Feminized
Hybrid
THC 19%%%
Top Rated

Jack Flash Feminized

CreativeEnergeticRelaxed
$20.29CAD
Alien Rock Candy Feminized
Hybrid
THC 18%%

Alien Rock Candy Feminized

RelaxedEuphoricCalm
$18.89CAD
Ogre Feminized
Hybrid
THC 23%%

Ogre Feminized

RelaxedHappyCalm
$20.99CAD
OG Diesel Kush Feminized
Hybrid
THC 20%%

OG Diesel Kush Feminized

RelaxedHappyEuphoric
$13.99CAD

Opium Feminized— Breeder & Stabilization Detail

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics — the internal breeding team at Royal King Seeds. Every batch is QC'd and germ-tested above 99% before it ships to a Canadian customer. Read the full breeding process or learn more on the about page.

Stabilization Level
F4
Generations Worked
4+
Breeding Program
Royal King Genetics Filial Program — four-generation pheno fixing
Stabilization Notes — What This Means for Your Grow

A mid-2010s cross stabilized over four generations of selection. Opium grows true-to-type and carries the cross-derived trait balance that defines the cultivar.

Breeding Goal

Strip off-type phenos out of Opium via filial selection.

Selection Focus

Picked for trichome density, bud structure, and the hybrid trait balance the cross was designed to land on.

Pollen / Mother Source

Royal King Genetics in-house breeder room — pollen pulled from a generation-tracked sibling-male line.

Last Batch QC Verified
January 31, 2026· 99%+ germination
HomeWishlistAccount