Yumboldt cannabis seeds packaging — Royal King Seeds Canada
Indica
THC 15%%
IndicaFeminizedIn Stock

Yumboldt Feminized

S1 FeminizedSee Lab Report →

Mellow feminized indica with relaxed and sleepy effects and tight node spacing. Ideal for beginner growers seeking an easy, resilient strain.

Flavor:Grape, musky kush, sweet spice

Best for:🌙Evening🛋️Relaxation😴Sleep Support
Beginner Friendly
🧬
THC
15%
Flower
9 - 11 weeks
⚖️
Yield
High
🎯
Difficulty
Beginner
📏
Height
Medium
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Support heavy colas with stakes as they mature

Select Pack Size
$15.39CAD

Premium stabilized genetics · germination guaranteed

Rewards careful growers with high output per plant
Delivers relaxed and sleepy effects ideal for evening
Forgiving indica genetics with strong resistance to rookie mistakes

Ready to grow this strain?

1
Verified by growers from coast to coast
🎁

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
Sought-after phenotype — batch-limited
Grown successfully across all provinces

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 2026-02-16 on 175 seeds.

Germination rate: 96.4% (n=175)
Last QC test date: 2026-02-16
Indoor yield: 423-586 g/m² (avg across 11 verified grower reports)
Outdoor yield: 495-758 g/plant (avg across 10 verified grower reports)

About Yumboldt Feminized

Spend enough time growing cannabis and you develop a nose for strains that back up their genetics with actual results. Yumboldt Feminized is one of those cultivars. The indica profile reads 71% indica and 29% sativa, which shows up in both the plant structure and the stone — a physically present effect that grounds you without knocking you sideways.

The Humulene-led terpene profile (hoppy, woody, herbal) is not something the breeder slapped on a label — you can smell it from across the room during week six of flower. When the soil and earthy notes lock in during the cure, the jar becomes something you want to open slowly and enjoy. At 13-17% THC, the potency supports the terpenes rather than overshadowing them.

Effects & Experience

The Relaxed quality that defines Yumboldt Feminized is present from the first exhale, but the way this indica unfolds over time is where it separates from the crowd. In our experience, the initial 10 minutes are characterized by a warm physical wash that starts in the chest and radiates outward. The Sleepy element arrives shortly after, filling in the gaps and rounding out the experience.

What keeps growers coming back to this strain is the consistency of its effect curve. Session after session, Yumboldt Feminized delivers the same progression: Relaxed leads, Sleepy supports, and Happy closes. That predictability matters when you are selecting a strain for a specific purpose rather than gambling on a new jar every time.

Low-dose users (one hit from a bowl or a short vaporizer session) will experience a measured version of this progression — enough to shift the mood without altering functionality. This makes Yumboldt Feminized a candidate for micro-dosing through the evening before committing to a full session at bedtime.

At full dose, the 13-17% THC hits harder than the percentage might suggest, likely due to the terpene entourage amplifying the cannabinoid effects. Expect couch-lock territory at 0.3g+ in a single session — this is genuine physical sedation, not drowsiness. The total experience runs 2-3 hours, with the final phase bringing Happy as a gentle wrap-up.

Flavor & Terpene Profile

Yumboldt Feminized is a flavor-first strain — the kind you smell before you see, and remember after you are done. The Humulene-dominant terpene profile gives it a hoppy, woody, herbal foundation that runs through every interaction with this flower, from cracking the jar to cleaning the grinder.

First draw: soil fills the mouth with authority. The smoke density is moderate, carrying the terpenes efficiently without the throat-scratching harshness of poorly grown or hastily dried flower. Second draw: the palate acclimates and earthy becomes discernible beneath the primary note. By the third draw: the full soil-earthy-pine sequence is apparent, with each flavor occupying its own space in the tasting experience.

The exhale reveals the Caryophyllene (peppery, spicy) component most clearly. This secondary terpene sits behind Humulene in concentration but punches above its weight in the flavor profile — particularly on low-temperature vaporizer sessions where its boiling point is reached before the heavier terpenes engage.

Three terpenes drive this strain's character: - Humulene — the hoppy, woody, herbal backbone, also contributing appetite-suppressing and grounding properties - Caryophyllene — peppery, spicy complexity, adding stress-reducing and mood-elevating qualities - Limonene — citrus, lemon zest finishing notes, with uplifting and energizing undertones

This terpene architecture does not just determine taste — it actively shapes the high. The Humulene content modulates how the THC expresses itself, which is why two strains at identical THC percentages can feel dramatically different. Yumboldt Feminized's specific combination creates an experience that is distinctly Relaxed and Sleepy, and the terpenes are a major reason why.

Aroma during grow: expect the smell to become noticeable to neighbours by late flower if growing outdoors. Indoor growers need active carbon filtration. The soil aroma is not a strain you can hide.

Growing Yumboldt Feminized in Canada

Real talk about growing Yumboldt Feminized: it does what the genetics say it will do, which is more than you can say for half the seeds on the market. This autoflower cultivar finishes in 70-85 days from germination, stays within 80-120cm indoors, and produces 400-550g/m² when the environment is dialed in.

Indoor Growing Profile: The indica structure means short, bushy plants with heavy lateral branching. Plan for 4-6 plants per 4x4 tent in a SOG layout, or 2-4 in a ScrOG setup with extended veg time. Lighting should target 600-800 PPFD during flower using full-spectrum LED.

The Canadian Outdoor Challenge: Every Canadian outdoor grower is racing the calendar. Autoflowering genetics give you a head start — the lifecycle is complete in under 90 days regardless of photoperiod, which means harvesting in August while the weather is still cooperating. 450-650g/plant per plant is achievable in full sun with proper soil preparation.

Height Management: From flip to final height, Yumboldt Feminized adds 30-50% during the flower stretch. Manage the stretch with supercropping or tie-downs during the first two weeks of flower.

Feeding Schedule Notes: Week-by-week adjustments produce the best results. Ramp nitrogen during veg weeks 2-4, taper during the transition, and push P-K ratios during weeks 3-6 of flower when calyx development peaks. Add silica throughout for stronger stems and enhanced trichome production.

Pest and Disease in Canadian Conditions: Fungus gnats thrive in the damp conditions common in Canadian basements. Use yellow sticky traps, let your medium dry slightly between waterings, and top-dress with diatomaceous earth. Powdery mildew is the other Canadian grow room nemesis — keep humidity below 50% in flower and maintain airflow. Dense bud structures hide mold until it is advanced — inspect inner colas regularly.

Comparable strains worth considering: Fruity Widow Feminized, Eran Almog Feminized, Big Bud Feminized. For growing fundamentals, reference our germination guide and our autoflower growing guide.

Harvest, Drying & Curing Yumboldt Feminized

The grow is only half the work. How you handle Yumboldt Feminized after chop determines whether the flower reaches its full potential or falls short. In our experience, this indica benefits from a longer dry than most growers give it.

Harvest timing: The trichome window for Yumboldt Feminized is relatively narrow — about a 5-7 day window where most trichomes are cloudy with 20-30% amber. Missing this window on either side changes the effect profile significantly. Early harvest produces a more cerebral, less sedating experience. Late harvest pushes further into body-heavy territory.

Drying protocol: Hang full branches in a dark room at 60°F and 55-60% relative humidity. Target 10-14 days for the initial dry. Dense buds from this strain dry from the outside in — what feels dry on the surface may still be moist at the core. Err on the side of longer drying time. Stems should snap cleanly (not bend) before trimming and jarring.

Curing for maximum expression: Trim to preference, jar at 60-65% humidity (use Boveda packs if needed), and burp daily for the first week, then every few days for weeks 2-4. Yumboldt Feminized reaches baseline quality at three weeks of curing but continues improving through week six. The soil and earthy terpene notes intensify noticeably between week two and week four — this is the stage where patience pays dividends that impatient growers never taste.

Storage: Sealed glass jars in a cool, dark location. Properly cured Yumboldt Feminized maintains potency and flavor for 8-12 months. Avoid plastic containers — trichomes stick to plastic surfaces and terpenes degrade faster in non-inert materials. For long-term storage beyond six months, vacuum sealing with a humidity pack extends shelf life significantly. For more techniques, check our autoflower growing guide. Find similar strains in our feminized cannabis seeds collection.

Who Yumboldt Feminized Is For

Growers with a harvest or two under their belt are in the sweet spot for this strain. It expects basic competence but does not demand constant intervention. The autoflowering lifecycle removes the complexity of light schedule management, which is one less variable for beginners to worry about.

Indoor growers get the most consistent results with Yumboldt Feminized — the controlled environment lets the genetics express themselves fully. Outdoor growers in zones 5-7 can run this strain successfully, though timing the plant date to maximize the Canadian summer window requires planning.

Goal-based fit: - Yield hunters: Yields are respectable but not record-breaking — the quality of the flower compensates. - Flavor chasers: The soil terpene profile makes this one worth growing for the taste alone. - Potency seekers: At 13-17% THC, the numbers are solid without being extreme.

Who should skip this one: Anyone looking for an energizing daytime strain. This is evening genetics through and through.

How Yumboldt Feminized Compares

Where does Yumboldt Feminized sit among indica seeds available in Canada? Above average for flavor, competitive on potency at 13-17% THC, and on par with comparable strains in terms of cultivation demands.

The closest alternatives — Fruity Widow Feminized or Eran Almog Feminized — share the general indica profile but differ in specifics. Yumboldt Feminized wins on soil terpene intensity. The Humulene-dominant profile creates a flavor that is immediately identifiable, which is not something every strain can claim.

Among autoflowering options, Yumboldt Feminized represents the current state of auto genetics: potency and yield numbers that approach photoperiod levels with the convenience of a fixed lifecycle. The gap has closed significantly — five years ago, recommending an auto to a serious grower was a stretch. Today, it is a legitimate choice.

The standout trait: the physical depth of the effects. Where other indicas relax, this one genuinely sedates at full dose.

Effects

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😊Happy
58% of people reported feeling Happy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Best For

Evening
Relaxation
Sleep Support

Strain Type

Indica 71%Sativa 29%

Strain Data Sheet

🧬THC15% - 20% (Medium-High)
🌿LineageGrape Ape × Bubba Kush
🔬TypeFeminized Indica
🌡ClimateAll Climates (Hardy)
📅HarvestMid - Late October
📏Height2.6 - 4.2 ft | 78 - 126 cm
⚖️YieldHigh
🏠Yield Indoor13.7 oz/ft² | 388 - 576 g/m²
🌳Yield Outdoor21 - 26 oz/plant | 588 - 726 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 Canada under the Cannabis Act (2018). Customers are responsible for understanding local laws.
1
Yumboldt Feminized
royalkingseeds.ca
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

Tyson Autoflower
IndicaAuto
THC 17%%
Fast Grow

Tyson Autoflower

RelaxedCalm
$19.59CAD
Pure Kush Feminized
Indica
THC 22%%

Pure Kush Feminized

RelaxedEuphoricCreative
$13.99CAD
Strawberry Cheesecake Autoflower
IndicaAuto
THC 22%%%
Top Seller

Strawberry Cheesecake Autoflower

HappyRelaxedUplifted
$20.29CAD
Anonymous OG Feminized
Indica
THC 20%%
High Yield

Anonymous OG Feminized

EuphoricCreative
$19.59CAD

Yumboldt 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
BX2
Generations Worked
3+
Breeding Program
Royal King Genetics Backcross Line — BX2 modern hybrid stabilization
Stabilization Notes — What This Means for Your Grow

Two backcross cycles to the recurrent parent have settled Yumboldt into a stable seed line. The cross-derived bud-to-leaf ratio expresses the same way pheno-to-pheno — no surprise hunting required out of the pack.

Breeding Goal

Carry a clone-derived recent-era hybrid into a stable seed pack.

Selection Focus

Picked for resin output, compact stature, and a clean indica terpene character.

Pollen / Mother Source

Royal King Genetics in-house mother stock — pollen pulled from a sibling male inside the same selected pheno population.

Last Batch QC Verified
April 12, 2025· 99%+ germination
HomeWishlistAccount