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the UK's Complete Cannabis Seed Catalogue — Over 1,600 Genetics Shipped Discreetly

Royal King Seeds stocks more than 1,600 cannabis seed varieties for UK growers — feminised, autoflowering, indica, sativa, hybrid, and CBD genetics priced in pounds, with grow figures taken from the originating breeder. Our 95% germination guarantee backs every order, and our growing support team is available seven days a week. Whether you are setting up your first grow tent in a Melbourne apartment or planning a multi-strain outdoor garden in a British garden, the right genetics are the foundation of every successful harvest. Try our strain finder quiz for tailored recommendations in under a minute, or plug your setup details into the yield calculator to preview your potential harvest weight.

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

1677 strains available

Genetics Available1,600+
Germination Guarantee95%
Priced InGBP (£)
Grow FiguresBreeder-sourced

Shop All Cannabis Seeds catalogue at a glance

Our shop all cannabis seeds collection currently holds 1677 strains in active inventory with verified THC content ranging from 1% at the low end to 33% at the high end (median 20%).

Strains
1677
THC range
1-33%
Median THC
20%
Auto / Photo
422/1254
  • Feminised photoperiod: 1254 strains (75% of the catalogue) — single-flip genetics with the largest single-plant yields.
  • Autoflowering: 422 strains (25% of the catalogue) — finishes 8-10 weeks seed-to-harvest.
  • Indica-dominant: 817 — body-led effects, compact structure, Myrcene-Caryophyllene terpene signature typical.
  • Sativa-dominant: 235 — cerebral effects, taller plants, Limonene-Pinene-Terpinolene profiles common.
  • Balanced hybrid: 580 — mixed indica/sativa lineage, ranges from 60/40 to 50/50 splits depending on phenotype.
  • CBD-rich therapeutic: 45 — 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.

Shop All Cannabis Seeds — Browse All Strains

What Sets Royal King Seeds Apart for UK Buyers?

UK growers return to Royal King Seeds because we back our genetics with action, not just claims. Every strain ships from careful storage and packing before dispatch. Our seed sourcing prioritises brerk. Our seed sourcing prioritises breeders with multi-generational stability — no untested hype drops. With over 200,000 fulfilled orders since 2019, we have built a track record that speaks through repeat customers rather than marketing copy. Transparent strain data, responsive support, and a no-questions-asked germination replacement policy round out the experience.

Navigating Cannabis Seed Categories

Our catalogue is organised to match the way UK growers actually shop. Feminised seeds guarantee 99.9% female plants — no males wasting space in your tent. Autoflowering genetics flower on their own schedule in eight to ten weeks, perfect for short-season regions or growers wanting multiple harvests per year. CBD-rich strains suit therapeutic cultivation with minimal psychoactive effects. High-THC options cater to experienced consumers chasing potency. Curated mix packs let you sample several genetics in one order at a bundled price. Our yield calculator estimates harvest weight for your specific environment.

Matching Seeds to the UK Climate

The UK has one temperate maritime climate, but a real north-south gradient — the south coast runs a season a fortnight longer at each end than the north. What decides an outdoor grow here is not heat but the wet finish: September and October rain on dense flower is where botrytis starts. That makes flowering time and bud structure matter more than raw yield potential. Most countries on earth. That means no single strain recommendation fits everywhere. Growers in Darwin and Cairns need mould-resistant genetics with open bud structures to survive wet-season humidity. Perth and Adelaide growers enjoy dry summers that suit almost any variety. Melbourne, Hobart, and Canberra demand fast-finishing strains or autoflowers that wrap up before autumn frosts arrive. Our state-specific growing guides match genetics to your postcode.

Autoflowering or Feminised — Picking the Right Seed Type

Autoflowers finish from seed in eight to ten weeks, stay compact, and skip the light-cycle management that photoperiod strains require. They suit beginners, balcony grows, and anyone chasing speed. Feminised photoperiod seeds hand you full control over plant size and timing — veg as long as you like, flip to flower when you are ready, and harvest heavier per plant. Experienced growers often run both types in parallel: autoflowers for quick rotations and feminised photoperiods for the main crop. Neither type is objectively better — the right choice depends on your space, schedule, and goals.

Growing Cannabis Seeds Successfully in UK Conditions

Quality genetics are the starting point, but execution seals the deal. Germinate using the paper towel technique or direct-sow into a seedling plug. Maintain temperatures between 21°C and 30°C, keep flowering-phase humidity around 40–60%, and hold soil pH between 6.0 and 6.5. Indoor growers should invest in a reliable LED or HPS fixture — light quality drives bud density more than any other controllable factor. Low-stress training and topping redistribute growth hormones for a flatter, more productive canopy. Outdoor growers in the UK sow from late April once frost risk passes, and harvest between September and mid-October depending on strain and latitude. Our full grow-guide library covers every stage from seed activation to curing.

Frequently Asked Questions

How do I choose between indoor and outdoor varieties?
Outdoors in the UK the season decides it: sow from late April, and anything not finished by mid-October is racing the autumn rain. That favours autoflowers and photoperiods in the eight-to-nine week bracket, with open bud structure to resist mould. Indoors you set the daylength yourself, so the constraint disappears and you can choose on effect, flavour and plant height instead.
How do I work out which seeds suit my situation?
Three factors narrow the field quickly: growing environment (indoor tent, outdoor plot, balcony, greenhouse), your experience level, and your local climate zone. First-time growers generally get the best results from autoflowering or feminised indica seeds. Our strain finder quiz generates personalised recommendations in under sixty seconds.
What germination success rate should I expect?
Our seeds carry a 95% germination rate when the recommended method is followed. Any seed that fails to sprout is replaced at no cost under our germination guarantee — no hoops, no small print.
How quickly will my order arrive?
Delivery options, charges and estimated timings are shown at checkout and on the delivery page. Every parcel ships in plain, unbranded packaging with tracking. Free shipping applies to orders over $150 AUD.
What separates autoflowering seeds from feminised photoperiod seeds?
Autoflowers transition to flowering based on age — typically eight to ten weeks total — and stay compact without needing a light-cycle change. Feminised photoperiod seeds require a shift to 12 hours of darkness to trigger bloom, grow larger, and yield more per individual plant. Both types produce exclusively female plants.
Where do you deliver?
Delivery coverage and charges are shown at checkout. Plain, unmarked packaging ensures complete discretion regardless of destination. Free shipping kicks in at $150 AUD.

Explore Related Cannabis Seed Categories

Classic Cannabis SeedsEnergizing Cannabis SeedsEuphoric SeedsExotic Cannabis SeedsHigh THC SeedsPurple Genetics SeedsAutoflower SeedsFeminized Seeds

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1677 strains. Use the search bar above to find any strain.

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