
Amsterdam Feminised
Amsterdam Feminised for South African growers β hybrid genetics at 18% THC, reported as happy, creative, focused. Sourced grow figures on the page, plain packaging, delivered nationwide.
Royal King Genetics β Seed-Lot Testing
Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-09-24 on 275 seeds.
About Amsterdam Feminised
South Africa is really two growing countries, and Amsterdam does not behave the same way in both. North and east of the escarpment the rain arrives in summer, so this 62/38 hybrid does its flowering while the air is still heavy; in the Western Cape the rain comes in winter, so the same plant ripens through a dry autumn instead. A 62/38 split travels better than either parent across a country running from subtropical coast to semi-desert. The canopy sits open enough to survive a humid KwaZulu-Natal autumn and dense enough to still look the part after a dry Karoo summer. At 18% THC with myrcene leading, what changes between a Johannesburg rooftop and a Cape smallholding is the schedule rather than the result.
The Aromatic Three
Leading with Myrcene, then Limonene, and Pinene underneath.
Difficulty: easy. In flower for Β±60 days. Stands 100β140 cm. Indoors it returns 325β425 g/mΒ². Outdoors, 400β600 g/plant a plant.
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Amsterdam Feminised β 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 Amsterdam. Each generation we cull aggressively against off-types β the F4 population reflects only the phenos that match the cultivar reference profile.
Cull off-type phenos in Amsterdam through filial selection.
Chosen for hybrid frame, clean terpene expression and consistent yield across the population.
Royal King Genetics in-house breeder room β pollen taken from a generation-tracked sibling-male line.