Amherst Diesel Feminised
A sativa testing at 27% THC, Amherst Diesel Feminised is reported creative, energetic, calm. Grown right across the country, from the Cape to the Lowveld. Discreet nationwide delivery and a germination guarantee.
Royal King Genetics — Seed-Lot Testing
Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-09-05 on 275 seeds.
About Amherst Diesel Feminised
Days 1 to 14, seed to fourth node: Expect Amherst Diesel to crack in roughly 48 hours on damp paper towel and to break soil by day three. Early growth runs upward quickly, narrow first leaves already reaching. Look for five nodes by day 14 with obvious gaps between them, which is the sativa pattern showing early. Damping off is rare if you hold near 70% humidity through this stage.
Weeks 3 to 6, building the frame: This is the point where it tries to get away from you. Start low-stress training in week three, bend the main stem over at 90 degrees in week four, and the secondaries will draw level for a flat canopy by week six without topping at all.
Bloom, weeks 1 to 10: The 12/88 character becomes obvious here. Pinene usually shows in week three and strengthens from there, with trichome cover visible without a loupe from about week five. Indoor yield: 400-600 g/m2. Height: Tall. Tested at 27% THC. Difficulty: easy.
The Aromatic Three
Leading with Pinene, then Limonene, and Caryophyllene underneath.
Difficulty: easy. In flower for 9-10 weeks. Stands Tall. Indoors it returns 400-600 g/m2. Outdoors, 2000-3000 g/plant a plant.
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Amherst Diesel Feminised — Breeder Information
Royal King GeneticsRecreated and stabilised by Royal King Genetics, the breeding team behind this catalogue. Seed lots are germination-tested before they ship. More on the breeding process and about page.
F4 stabilisation on Amherst Diesel. Each generation we cull aggressively against off-types — the F4 population reflects only the phenos that match the cultivar reference profile.
Carry Amherst Diesel from F1 cross to F4 production-ready seed stock.
Chosen for clear-headed terpene expression, structural manageability and a finish that lands inside the published window.
Royal King Genetics in-house mother stock — pollen taken from a sibling male drawn from the same selected pheno population.