Purple Arrow Auto
Purple Arrow Auto for South African growers — indica genetics at 21% THC, reported as creative, calm. Sourced grow figures on the page, plain packaging, delivered nationwide.
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 2026-09-24 on 150 seeds.
About Purple Arrow Auto
The way to plan Purple Arrow is backwards from the day you intend to cut, with up to 300 g/m2 per square metre indoors and up to 300 g/plant per plant outdoors as the figures you are working toward, at 21% THC. Count 50-60 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 Myrcene, then Humulene, and Linalool underneath.
Difficulty: easy. In flower for 50-60 days. Stands 70–110 cm. Indoors it returns up to 300 g/m2. Outdoors, up to 300 g/plant a plant.
Effects
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At a Glance
In the Packet
Regular
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the source
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Purple Arrow 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.
Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. Purple Arrow sits at F5 — every plant in the pack autoflowers reliably and finishes inside a tight window.
Reach auto trigger and finish-window uniformity for the Purple Arrow pack.
Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.