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Amherst Diesel Feminized
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
Grower tip: Flip to 12/12 early — sativas stretch 2–3× in flower
Premium stabilized genetics · germination guaranteed
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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.
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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.
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.
| Setup | Yield |
|---|---|
| Outdoor, 15-gal fabric pot, partial shade | 889g |
| 4×4 tent, 600W LED, defoliation | 526g |
Amherst Diesel Feminized — Sourcing & Genetics
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.
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 GeneticsBred 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.
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.
Take Amherst Diesel from F1 cross to F4 production-ready seed stock.
Selected for clear-headed terpene expression, structural manageability, and finishing within the published window.
Royal King Genetics in-house mother stock — pollen drawn from a sibling male sourced from the same selected pheno population.