Amherst Diesel Auto
Amherst Diesel Auto: sativa cannabis seeds picked for South African conditions. 27% THC, with creative, energetic, calm the effects most often reported. Posted discreetly countrywide.
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 2026-09-15 on 100 seeds.
About Amherst Diesel Auto
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: 350–550 g/m². Height: Tall (150 cm+). Tested at 27% THC. Difficulty: beginner friendly.
The Aromatic Three
Leading with Pinene, then Limonene, and Caryophyllene underneath.
Difficulty: beginner friendly. In flower for 8-10 weeks. Stands Tall (150 cm+). Indoors it returns 350–550 g/m². Outdoors, 1000 g per plant a plant.
Effects
Reach For It When
Strain Type
At a Glance
In the Packet
Regular
Seeds
the source
inside
number
Related Strains
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.
Tigermelon Auto
Tigermelon Auto for South African growers — indica genetics at 27% THC, reported as relaxed, euphoric. Sourced grow figures on the page, plain packaging, delivered nationwide.
Sour Diesel Feminised
Sour Diesel Feminised for South African growers — sativa genetics at 24% THC, reported as happy, energetic, creative. Sourced grow figures on the page, plain packaging, delivered nationwide.
Paris XXX Auto
Buy Paris XXX Auto seeds in South Africa. Indica · 20% THC · creative, focused, calm. Every figure on this page is sourced, and every order ships unbranded.
Amherst Diesel Auto — 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.
Amherst Diesel is an autoflowering line that has been progressed through five rounds of Royal King Genetics autoflower stabilisation. The autoflower trait is recessive — fixing it takes multi-generation work — and at F5 the auto trigger and finish window are welded across the pack.
Lock the autoflower trait in Amherst Diesel through five generations of selection.
Chosen for vigour, manageable stretch and the cerebral terpene profile sativa growers buy this strain for.
Royal King Genetics in-house mother stock — pollen taken from a sibling male drawn from the same selected pheno population.