Grandpa Larry OG Feminised
Grandpa Larry OG Feminised: indica cannabis seeds picked for South African conditions. 18% THC, with euphoric, creative, 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 2026-09-05 on 400 seeds.
About Grandpa Larry OG Feminised
The way to plan Grandpa Larry OG is backwards from the day you intend to cut, with up to 350 g/m2 per square metre indoors and up to 400 g/plant per plant outdoors as the figures you are working toward, at 18% THC. Count 60-70 days back from that date and you have your flip date. Most of the final weight lands between weeks 5 and 8, when calyxes stack fastest and trichome cover goes from patchy to complete. Outdoors in the Southern Hemisphere you want that fattening phase falling in February while the days are still long, which puts a late-March cut about right for most of the country.
The Aromatic Three
Leading with Caryophyllene, then Myrcene, and Bisabolol underneath.
Difficulty: moderate. In flower for 60-70 days. Stands 90-120 cm. Medium. Indoors it returns up to 350 g/m2. Outdoors, up to 400 g/plant a plant.
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Grandpa Larry OG 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.
Grandpa Larry OG has been the target of countless seed-bank backcross programmes. Ours is BX3 — three rounds of crossing the elite cut back to the parental line until trait expression evened out. The pack grows true to the mother cut.
Translate a clone-only West Coast clone-only cultivar to seed without losing the mother profile.
Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.