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Photoperiod Cannabis Seeds — Full Control Growing for Australian Cultivators

Photoperiod seeds flower in response to light-cycle changes, placing the grower in full command of vegetative duration, plant size, and harvest timing. This category houses the most potent, highest-yielding, and most flavourful genetics in our catalogue. If you want to clone, train extensively, or push individual plant output to its maximum, photoperiod seeds are the tool for the job.

All strains in this collection are bred & stabilised in-house by Royal King Genetics

1255 strains available

Veg Light18/6 Hours
Flower Light12/12 Hours
Grower ControlMaximum
Ideal ForExperienced Cultivators

Photoperiod Seeds catalogue at a glance

Our photoperiod seeds collection currently holds 1255 strains in active inventory with verified THC content ranging from 1% at the low end to 33% at the high end (median 20%).

Strains
1255
THC range
1-33%
Median THC
20%
Auto / Photo
0/1254
  • Feminised photoperiod: 1254 strains (100% 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: 417 — 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

1255 strains
🌱
Hybrid
THC 22%
🎨 Creative

American Strains Pack

EnergizingHappyCreative
▼
$26.99AUD
White Rhino cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 20%
📈 High Yield

White Rhino Feminized

EuphoricHappyRelaxed
▼
$14.49AUD
Buddha's Sister cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 20%
📈 High Yield

Buddha's Sister Feminized

EuphoricHappyRelaxed
▼
$11.99AUD
3 Kings cannabis seeds packaging — Royal King Seeds Australia
Sativa
THC 16%
🎨 Creative

3 Kings Feminized

HappyEnergeticCreative
▼
$14.49AUD
Afcrack cannabis seeds packaging — Royal King Seeds Australia
Hybrid
THC 19%
🎨 Creative

Afcrack Feminized

EuphoricCreativeCalm
▼
$12.99AUD
Sweet Dream cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 15%
🌙 Sleep Aid

Sweet Dream Feminized

RelaxedSleepyHappy
▼
$11.99AUD
Chiesel cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 18%
🎨 Creative

Chiesel Feminized

EuphoricCreativeEnergetic
▼
$10.99AUD
Cuvee cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 19%
🌙 Sleep Aid

Cuvee Feminized

RelaxedSleepyHappy
▼
$12.99AUD
Raspberry Cough Kush cannabis seeds packaging — Royal King Seeds Australia
Sativa
THC 20%
🎨 Creative

Raspberry Cough Kush Feminized

EuphoricCreativeCalm
▼
$13.49AUD
Sexxpot cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 19%
🌙 Sleep Aid

Sexxpot Feminized

RelaxedSleepyHappy
▼
$10.99AUD
Jet Fuel cannabis seeds packaging — Royal King Seeds Australia
Sativa
THC 18%
🎨 Creative

Jet Fuel Feminized

EuphoricRelaxedUplifted
▼
$15.99AUD
San Fernando Valley Kush cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 15%
😄 Mood Boost

San Fernando Valley Kush Feminized

EuphoricCalm
▼
$13.49AUD
Super Snow Dog cannabis seeds packaging — Royal King Seeds Australia
Hybrid
THC 18%
📈 High Yield

Super Snow Dog Feminized

RelaxedHappyEuphoric
▼
$13.99AUD
Diesel Power cannabis seeds packaging — Royal King Seeds Australia
Sativa
THC 20%
🎨 Creative

Diesel Power Feminized

EuphoricCreativeEnergetic
▼
$11.99AUD
Alpine Star cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 24%
🌙 Sleep Aid

Alpine Star Feminized

RelaxedSleepyHappy
▼
$11.99AUD
Apple Tarts cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 24%
🎨 Creative

Apple Tarts Feminized

CreativeFocusedCalm
▼
$12.49AUD
Alien Mints cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 18%
🎨 Creative

Alien Mints Feminized

HappyCreative
▼
$13.99AUD
Purple Cotton Candy cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 19%
🎨 Creative

Purple Cotton Candy Feminized

EuphoricCreativeCalm
▼
$14.99AUD
Appleberry cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 24%
🌙 Sleep Aid

Appleberry Feminized

RelaxedSleepyHappy
▼
$14.99AUD
Avalon cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 19%
🌙 Sleep Aid

Avalon Feminized

RelaxedSleepyHappy
▼
$11.99AUD
707 Headband cannabis seeds packaging — Royal King Seeds Australia
Sativa
THC 22%
🎨 Creative

707 Headband Feminized

EuphoricCreativeUplifted
▼
$15.49AUD
Area 51 cannabis seeds packaging — Royal King Seeds Australia
Hybrid
THC 27%
⚡ High Potency

Area 51 Feminized

CreativeFocusedCalm
▼
$10.99AUD
Big Bud cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 21%
🌙 Sleep Aid

Big Bud Feminized

RelaxedSleepyHappy
▼
$12.49AUD
Ecto Cooler cannabis seeds packaging — Royal King Seeds Australia
Indica
THC 18%
🌙 Sleep Aid

Ecto Cooler Feminized

RelaxedSleepyHappy
▼
$14.99AUD
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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?
Photoperiod plants flower in response to a light-schedule change (12/12), giving you control over when flowering starts and how large the plant grows beforehand. Autoflowers bloom automatically based on age. Photoperiod genetics offer greater yield per plant and the ability to clone.
How long does a photoperiod grow take from seed to harvest?
Total cycle time is typically three to five months. Vegetative growth takes four to eight weeks at the grower's discretion, plus eight to eleven weeks of flowering. Shorter veg produces smaller plants faster; longer veg builds larger plants with heavier yields.
Can a beginner successfully grow photoperiod seeds?
Yes, though autoflowers offer a gentler learning curve for absolute newcomers. Photoperiod growing requires understanding light-cycle management and recognising the right moment to flip. After completing one auto grow, most growers have enough experience to handle photoperiod genetics confidently.
What is the practical advantage of photoperiod over autoflower?
Photoperiod growing delivers larger per-plant yields, full cloning capability, complete control over plant size, and access to the widest range of premium genetics. It is the preferred approach for cultivators who want maximum output and creative flexibility.

Explore Related Cannabis Seed Categories

Best Seller SeedsBest Strains For AnxietyBest Strains For High YieldBest Strains For Indoor GrowingBest Strains For Outdoor GrowingBOGO SeedsAutoflower SeedsFeminized Seeds

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