Photoperiod Cannabis Seeds — Full Control Growing for UK Cultivators — Page 30
Page 30 of photoperiod seeds at Royal King Seeds. Continue browsing the range below.
1264 strains available
Photoperiod Seeds catalogue at a glance
Our photoperiod seeds collection currently holds 1264 strains in active inventory with verified THC content ranging from 1% at the low end to 33% at the high end (median 20%).
- Feminised photoperiod: 1254 strains (99% of the catalogue) — single-flip genetics with the largest single-plant yields.
- Indica-dominant: 608 — body-led effects, compact structure, Myrcene-Caryophyllene terpene signature typical.
- Sativa-dominant: 186 — cerebral effects, taller plants, Limonene-Pinene-Terpinolene profiles common.
- Balanced hybrid: 426 — mixed indica/sativa lineage, ranges from 60/40 to 50/50 splits depending on phenotype.
- CBD-rich therapeutic: 44 — elevated CBD with proportionally lower THC, suited to medical-focused growers.
- Alphabetical lineup starts with: $100 OG, 13 Dawgs, 24k Gold — see the full grid below for filters, lab data and grower reports.
Photoperiod Seeds — Browse All Strains
How Photoperiod Genetics Work
Photoperiod cannabis transitions from vegetative growth to flowering when the daily dark period exceeds a critical threshold — roughly twelve uninterrupted hours. In nature, this happens as days shorten through autumn. Indoors, the grower controls the switch by adjusting the timer. This mechanism gives you precise control over plant size: veg for two weeks for a small plant, or eight-plus weeks for a large one. Photoperiod genetics encompass the most acclaimed cultivars in cannabis history and produce the highest per-plant yields achievable.
Photoperiod Advantages Over Autoflower Genetics
Photoperiod plants can be vegged indefinitely, allowing you to grow them to any size your space allows. They are fully clonable — take cuttings from a proven mother to replicate her genetics at zero seed cost. Light-cycle techniques such as greenhouse light deprivation become available. Photoperiod lines represent the deepest genetic pool in cannabis, including the most potent, most flavourful, and most visually striking cultivars on the market. The trade-off is a longer total grow cycle and a slightly steeper learning curve compared to autoflowers.
Photoperiod Cultivation Walkthrough
Germinate and establish seedlings under 18/6 light. Veg until the plant fills roughly 50–60% of your canopy footprint. Top, train, and shape the canopy throughout veg. When ready, switch to 12/12 to trigger bloom. Plants will stretch 50–200% during the transition — account for this when deciding when to flip. Transition to bloom nutrients once pistils form. Most photoperiod strains flower for eight to eleven weeks. Harvest when trichome maturity matches your effect preference — mostly milky for cerebral, more amber for physical.
Frequently Asked Questions
What makes photoperiod seeds different from autoflowers?
How long does a photoperiod grow take from seed to harvest?
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Photoperiod Seeds A–Z — part 30 of 53
5 of 300 strains, in alphabetical order. The index continues on the next page. Use the search bar above to find any strain.
