Purple Cannabis Seeds — Anthocyanin-Rich Genetics for Striking UK Harvests
Purple seeds produce plants with vivid violet, plum, and near-black colouration in their flowers and foliage. The colour comes from anthocyanin pigments — the same compounds that colour blueberries and red grapes — and is amplified by cool nighttime temperatures during late bloom. Beyond visual drama, purple cultivars often carry unique grape, berry, and floral terpene profiles that set them apart on flavour.
113 strains available
Purple Genetics Seeds catalogue at a glance
Our purple genetics seeds collection currently holds 113 strains in active inventory with verified THC content ranging from 5% at the low end to 33% at the high end (median 19%).
- Feminised photoperiod: 80 strains (71% of the catalogue) — single-flip genetics with the largest single-plant yields.
- Autoflowering: 33 strains (29% of the catalogue) — finishes 8-10 weeks seed-to-harvest.
- Indica-dominant: 80 — body-led effects, compact structure, Myrcene-Caryophyllene terpene signature typical.
- Sativa-dominant: 4 — cerebral effects, taller plants, Limonene-Pinene-Terpinolene profiles common.
- Balanced hybrid: 29 — mixed indica/sativa lineage, ranges from 60/40 to 50/50 splits depending on phenotype.
- Alphabetical lineup starts with: Ayahuasca Purple, Ayahuasca Purple, Black Water Purple OG Cheese — see the full grid below for filters, lab data and grower reports.
Purple Genetics Seeds — Browse All Strains
The Science of Purple Cannabis
Purple colouration in cannabis is produced by anthocyanin pigments — water-soluble flavonoids that shift colour based on pH. The same molecular family colours blueberries, red cabbage, and grape skins. Certain cannabis genotypes carry elevated anthocyanin production as a heritable trait. Cool nighttime temperatures (15–18°C) during the final two to three weeks of flowering trigger and intensify the colour shift. Crucially, the genetic predisposition must be present — lowering temperature alone will not turn a green strain purple. Every cultivar in our purple genetics section is bred for strong anthocyanin expression.
Premier Purple Cultivars
Granddaddy Purple — the benchmark purple strain worldwide, combining heavy indica effects with grape-candy flavour. Purple Punch — sweet grape and baked-cookie terpenes. Purple Haze — Hendrix-inspired sativa with cerebral energy and lavender hues. Purple Kush — pure indica heritage with full violet expression. Tropicana Purple — citrus brightness wrapped in deep purple flowers. Forbidden Fruit — cherry-grapefruit depth with dark, dramatic colouring. Each delivers striking aesthetics alongside effects and flavour that justify the visual appeal.
Frequently Asked Questions
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Purple Genetics Seeds A–Z — part 1 of 5
22 of 113 strains, in alphabetical order. The index continues on the next page. Use the search bar above to find any strain.
