Amherst Diesel cannabis seeds packaging — Royal King Seeds Canada
Sativa
THC 27%%
SativaFeminizedIn Stock

Amherst Diesel Feminized

S1 FeminizedSee Lab Report →

High-potency feminized sativa with creative and energetic effects and vigorous vegetative growth. Ideal for advanced growers seeking top-shelf yields and terpene complexity.

Flavor:Citrus, pine, herbal spice

Best for:🌞Daytime🎨Creative Projects🤝Social Activities
Advanced Grower
🧬
THC
27%
Flower
9 - 11 weeks
⚖️
Yield
High
🎯
Difficulty
Advanced
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Flip to 12/12 early — sativas stretch 2-3x in flower

Select Pack Size
$19.59CAD

Premium stabilized genetics · germination guaranteed

Generates high production in both indoor and outdoor setups
Hits with clean creative effects that shine during daytime
Connoisseur-grade sativa genetics with rich terpene potential

Ready to grow this strain?

1
Reliable performer for home cultivators
🎁

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
Trusted by thousands of Canadian 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 2026-04-14 on 275 seeds.

Germination rate: 96.1% (n=275)
Last QC test date: 2026-04-14
Indoor yield: 426-562 g/m² (avg across 10 verified grower reports)
Outdoor yield: 656-986 g/plant (avg across 9 verified grower reports)

About Amherst Diesel Feminized

The name Amherst Diesel Feminized has been circulating through Canadian grow communities for a reason, and it is not marketing. Growers talk about this sativa because it does what the genetics promise: Creative effects, chemical flavor, and a responsive plant that pays back every hour of attention during flower.

At 25-29% THC and a 12/88 indica-sativa split, Amherst Diesel Feminized occupies a comfortable space. Not trying to break potency records. Not chasing novelty. Just delivering a sativa experience with genuine Ocimene terpene expression and the kind of Energetic secondary effect that rounds out every session. Grow it, cure it right, and the flower speaks for itself.

Effects & Experience

What does Amherst Diesel Feminized feel like? The honest answer changes depending on dosage. At one hit: a light Creative wash that colors the next 30 minutes without dominating them. At two to three hits: the full sativa experience — Creative as the foundation, Energetic building on top, and a physical awareness that aligns with the 12% indica heritage. Beyond that: the cerebral intensity ramps up significantly — thoughts accelerate and sensory perception sharpens to a degree that some find overwhelming.

The onset timing is reliable at 3-7 minutes through inhalation. Edibles made from Amherst Diesel Feminized flower hit differently — the Calm quality becomes more pronounced and the duration stretches to 4-6 hours, which is worth knowing if you plan to process your harvest.

Scenario mapping for real use: wake-and-bake creative session (one hit), deep-focus work block (two hits), festival or social event (two to three hits). The Energetic quality that shows up during the descending phase is gentle enough that you do not need to block out recovery time after consuming.

At 25-29% THC, Amherst Diesel Feminized is potent enough to be respected but approachable enough that experienced consumers will feel the weight without needing to consume excessive amounts. The Ocimene terpene amplifies the perceived intensity through the entourage effect — do not judge this strain by the THC number alone.

Flavor & Terpene Profile

Breaking a nug of Amherst Diesel Feminized in half releases an immediate burst of chemical aroma that tells you exactly what this strain is about. The terpene density here is noticeable — this is not a faint whiff that fades in seconds. The Ocimene-dominant profile sustains a sweet, herbaceous, woody presence that fills the room and sticks to your fingers after handling the bud.

Smoke character: the first draw brings chemical front and center, with the texture sitting somewhere between smooth and full-bodied. It is not a light smoke, but it is not harsh either — there is a substance to each pull that carries the flavor without irritation. The exhale shifts the profile toward acrid territory, with skunky showing up as a subtle finishing note that rewards attention.

One detail growers should know: the chemical and acrid notes intensify dramatically during the last two weeks of flower. In our experience, the terpene production ramps up faster than resin production during this final stretch, which is part of why Amherst Diesel Feminized rewards patience at the end of the cycle. Harvest a week early and you will lose a significant portion of the flavor complexity.

The three terpenes working together in Amherst Diesel Feminized are: - Ocimene (primary) — sweet, herbaceous, woody base notes, contributes energizing and uplifting properties to the high - Humulene (secondary) — hoppy, woody, herbal mid-tones, adds appetite-suppressing and grounding qualities to the experience - Terpinolene (tertiary) — herbal, floral, woody accents, provides mildly sedating with creative undertones nuance

This combination is why Amherst Diesel Feminized tastes the way it does and why the effects feel as cohesive as they do. Stripping out any one of these terpenes — through harsh extraction methods or poor curing — fundamentally changes the character of the final product. For the best expression, consume through clean glass or a quality dry herb vaporizer at 350-370°F.

Growing Amherst Diesel Feminized in Canada

Amherst Diesel Feminized is classified as a intermediate-level grow, and that rating holds up in practice. As an autoflower, the lifecycle runs on an internal clock — expect roughly 70-85 days from seed to harvest regardless of your light schedule. This makes it one of the more straightforward options for Canadian growers working with short outdoor seasons.

Indoor Performance: Under a quality LED (600-800 PPFD during flower), Amherst Diesel Feminized reaches 120-180cm and produces 400-550g/m² when given proper conditions. The stretchy growth habit means you need vertical clearance — deducting pot and light height, plan for at least 6 feet of usable canopy space. ScrOG training during veg is strongly recommended to manage height and distribute bud sites evenly.

Outdoor Performance: In Canadian zones 5b-7a (southern Ontario, BC Lower Mainland, southern Prairies), Amherst Diesel Feminized can be started outdoors in mid-May and harvested by early August, well before first frost concerns. Northern growers in zones 3-4 should start indoors under lights for the first 2-3 weeks before transitioning outside once overnight lows stay above 10°C. Outdoor yields reach 450-650g/plant in good conditions.

Height and Stretch: Significant stretch during early flower — plants can double or triple their height in the first 2-3 weeks of 12/12. If growing indoors without height to spare, flip early and train aggressively during the stretch period. This strain reaches its final height of 120-180cm 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 Amherst Diesel Feminized is underestimating the stretch. Growers who veg this strain to full size before flipping end up fighting the ceiling during flower. Flip early or train hard — preferably both.

Canadian Climate Notes: Humidity spikes during September and October are the biggest threat to outdoor growers running Amherst Diesel Feminized. The autoflower timing helps — harvesting in July or August avoids the worst of fall humidity entirely. 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 autoflowering seeds for related genetics.

Harvest, Drying & Curing Amherst Diesel Feminized

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

Harvest timing: The trichome window for Amherst Diesel Feminized is moderately wide — you have about a 7-10 day window to harvest without dramatically altering the effect profile. Within that window, earlier harvest preserves the energetic qualities while later harvest adds physical weight to the experience.

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. The bud structure allows fairly even drying, but monitor closely after day 7 for over-drying. 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. Amherst Diesel Feminized reaches baseline quality at three weeks of curing but continues improving through week six. The chemical and acrid 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 Amherst Diesel 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 Amherst Diesel Feminized Is For

This section is about honest fit. Amherst Diesel Feminized works well for growers who enjoy the process and consumers who appreciate nuance in their flower. It is a set-it-and-forget-it autoflower that rewards deliberate cultivation decisions.

Grower profiles that match: - Home cultivators with taller grow spaces (5+ feet usable canopy) running continuous harvest rotations - Canadian outdoor growers in any zone with 70+ frost-free days - Intermediate to advanced growers looking for a reliable producer

Consumer profiles that match: - Daytime users, creative workers, social consumers - Experienced consumers with established tolerance - Flavor-forward consumers who prioritize chemical and acrid terpene profiles

Honest disqualifiers: If you get anxious from sativa-dominant strains, this is not the one. If your grow space is under 4 feet, look elsewhere.

How Amherst Diesel Feminized Compares

Placing Amherst Diesel Feminized in context against similar sativa options: Blue Cinex Feminized, Hawaiian Haze Feminized, Sour Amnesia Auto occupy the same general space but differ in key areas.

Amherst Diesel Feminized brings 25-29% THC, a chemical-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 Creative effects are consistent across seeds and harvests. Where it is matched: yield numbers are in line with category averages. Where competitors may edge ahead: flavor complexity — at this potency level, some growers prefer strains that dial back THC in favor of deeper terpene expression.

The autoflower format deserves a direct comparison. Versus a photoperiod version of similar genetics: auto yields typically run 15-25% lower, THC may be 1-3% lower, but the total cycle time is dramatically shorter (10-12 weeks versus 14-18 weeks). For Canadian growers, the autoflower advantage in short-season outdoor growing is significant.

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

Effects

🤩Creative
77% of people reported feeling Creative
🤑Energetic
64% of people reported feeling Energetic
🧘Calm
60% of people reported feeling Calm
😊Happy
51% of people reported feeling Happy
😎Uplifted
45% of people reported feeling Uplifted
🤗Euphoric
40% of people reported feeling Euphoric
🧠Focused
35% of people reported feeling Focused
🗣️Talkative
23% of people reported feeling Talkative
💪Motivated
24% of people reported feeling Motivated

Best For

Daytime
Creative Projects
Social Activities

Strain Type

Indica 12%Sativa 88%

Strain Data Sheet

🧬THC27% - 32% (Very High)
🌿LineageAmnesia Haze × Green Crack
🔬TypeFeminized Sativa
🌡ClimateMild, Warm
📅HarvestMid - Late October
📏Height4.6 - 6.9 ft | 139 - 208 cm
⚖️YieldHigh
🏠Yield Indoor17.6 oz/ft² | 499 - 698 g/m²
🌳Yield Outdoor18 - 26 oz/plant | 499 - 748 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
Amherst Diesel Feminized
royalkingseeds.ca
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

Tangerine Power Feminized
Sativa
THC 19%%%

Tangerine Power Feminized

HappyRelaxedUplifted
$17.49CAD
Project Blue Book Feminized
Sativa
THC 20%%

Project Blue Book Feminized

HappyEnergeticCreative
$18.19CAD
Galactic Jack Feminized
Sativa
THC 24%%%
Top Rated

Galactic Jack Feminized

EnergeticFocusedUplifted
$20.99CAD
AK Autoflower
SativaAuto
THC 19%%
Fast Grow

AK Autoflower

HappyEnergeticCreative
$13.99CAD

Amherst Diesel 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
F4 Production Line — modern cross stabilization
Stabilization Notes — What This Means for Your Grow

F4 stabilization on Amherst Diesel. Each cycle we cull aggressively against off-types, so the F4 population reflects only the phenos that match the cultivar reference profile.

Breeding Goal

Move Amherst Diesel from F1 cross to F4 production-ready seed stock.

Selection Focus

Picked for clear-headed terpene expression, structural manageability, and finishing inside the published window.

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
March 11, 2026· 99%+ germination
HomeWishlistAccount