Amherst Diesel cannabis seeds packaging — Royal King Seeds USA
Sativa
THC 27%
High Potency
SativaFeminizedIn Stock

Amherst Diesel Feminized

S1 FeminizedLab Profile Available →

High-potency feminized sativa with creative and energetic effects and vigorous vegetative growth. Ideal for intermediate growers seeking stable genetics and strong production.

Flavor:Citrus, pine, herbal spice

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

Grower tip: Flip to 12/12 early — sativas stretch 2–3× in flower

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$13.99USD

Premium stabilized genetics · germination guaranteed

Generates high production in both indoor and outdoor setups
Hits with clean creative effects that shine during daytime
Sativa-dominant genetics with stable, consistent phenotype

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About Amherst Diesel Feminized

The most common mistake growers make with Amherst Diesel is not flipping early enough. This ${indica}/${sativa} genetics stretches 40-60% after the 12/12 switch, which means a plant flipped at 24 inches can reach 40+ inches at the canopy — too tall for standard tents. Flip at 16-18 inches and train the tallest branches during the first two weeks of stretch. At 27% THC with pinene-dominant terpenes, the quality ceiling is high — but you have to manage the specific characteristics of this cultivar to reach it.

Growing This Strain: Where Things Go Right and Wrong

The three most common issues growers report with Amherst Diesel:

1. Nutrient timing at the flip. This cultivar shifts its feeding demand faster than many strains at the veg-to-flower transition. Growers who continue high-nitrogen veg feed for more than 5-7 days after the 12/12 switch see excess foliage development at the expense of bud formation. Switch to bloom nutrients within the first week of seeing pistils.

**2. Height management. The stretch surprises indoor growers who flip too late. In a 5-foot tent, flip when the plant is 16-18 inches. Under LED the stretch is slightly less than HPS, but still significant. Supercrop the tallest branches during weeks 2-3 of flower if height becomes critical.

3. Harvest timing. With pinene as the dominant terpene, the aromatic peak does not align perfectly with the trichome maturity peak. Growers chasing maximum terpene expression should harvest at 10-15% amber. Growers prioritizing potency should wait for 15-20% amber. These are different windows — know which one you are targeting.

Flowering: 9-11 weeks. Yield: 450-550g/m² indoor / 350-500g/plant outdoor. Height: Compact (2-3 ft). Difficulty: intermediate.

Effects and Use

At 27% THC, Amherst Diesel delivers creative, energetic, calm effects with a pinene-influenced character. The onset is cerebral — a brightening of the mental space that arrives within minutes and can enhance focus, creativity, and conversation for 2-3 hours before gradually softening. The body stays comfortable without heaviness. The pinene dominance adds a clarity that many users describe as "functional".

Terpene Profile

Dominant terpenes: Pinene (primary), Limonene (secondary), Caryophyllene (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 Amherst Diesel

Best suited for growers who want control over their plant size and harvest timing — photoperiod genetics let you veg as long as you want before triggering flower. The intermediate difficulty rating means basic growing competence is sufficient, but attention to detail during flower produces noticeably better results. Ships discreetly to all 50 US states with our germination guarantee.

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 the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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Amherst Diesel Feminized
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Amherst 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
27.3%
CBD
0.04%
Top Terpenes
Limonene, Myrcene, Pinene
Test Lab
Aurum Labs (CO)
2024

Amherst Diesel Feminized — Real Grower Yield Reports

Yield data from US growers cultivating Amherst 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, 15-gal fabric pot, partial shade889g
4×4 tent, 600W LED, defoliation526g

Amherst Diesel Feminized — Sourcing & Genetics

Release Era
Late 2000s
Parent Genetics
Acapulco Gold × modern sativa hybrid
Lineage Notes

Amherst Diesel Feminized was bred in Spain by a respected European seed bank and selected for stability across multiple climates before reaching the US market.

Recommended US Climate

Best in long-season warm climates (CA, OR, FL, HI, Southern states). Indoor cultivation works in any climate.

Amherst 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
F4
Generations
4+
Breeding Program
F4 Production Line — modern cross stabilization
Stabilization Notes — What This Means for Your Grow

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

Breeding Goal

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

Selection Focus

Selected for clear-headed terpene expression, structural manageability, and finishing within the published window.

Pollen / Mother Source

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

Last Batch QC Verified
March 8, 2026· 99%+ germination
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