Common Questions from UK Growers

Feminised seeds yield virtually all female plants (99.9%) and depend on photoperiod changes — switching to a 12/12 light schedule — to begin flowering. Autoflowering varieties, by contrast, transition into bloom automatically once they reach a certain maturity (typically 8-10 weeks after sprouting), irrespective of how many hours of light they receive.

For optimal longevity, place your seeds inside an airtight vessel — such as a sealed glass jar — and store them in the refrigerator. A cool, dark, moisture-free environment preserves viability for multiple years. Avoid temperature fluctuations, as these can trigger premature germination.

Absolutely. Should your seeds not sprout when you follow our recommended germination technique, we will send replacements at no charge. Simply reach out within 30 days of receiving your parcel, including your order reference and photographs that document your germination attempt.

Of course! Our blog features detailed cultivation guides written for UK conditions — a short season, long midsummer days, and a wet finish. Beyond that, our support crew is always glad to assist with varietal selection, troubleshooting, and general growing questions tailored to your region.

Outdoors, the ones that finish before the autumn turns. British summers are cool rather than hot, and the limiting factor is the wet September and October rather than heat — so autoflowers and photoperiods with an eight-to-nine week bloom are the reliable choices, and open bud structure matters more than a big yield figure. Indoors the climate stops mattering, because you set the temperature and daylength yourself.

Delivery coverage, options and charges are shown at checkout and on our delivery page.

Available delivery options and their estimated timings are shown at checkout before you pay.

Any free-delivery threshold currently in effect is applied automatically at checkout and shown on your order summary before payment.

Completely. We use unmarked, generic boxes or satchels with no logos, product descriptions, or any reference to cannabis, seeds, or Royal King Seeds anywhere on the exterior. Your privacy matters to us.

Browse our seed catalogue, select your preferred strains and pack sizes, then proceed to checkout. Enter your delivery address and payment information, and you will receive an order confirmation email shortly after.

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Get in touch within 2 hours of ordering by emailing support@royalkingseeds.co.uk. Once an order moves into the packing stage, changes may no longer be feasible.

Yes. We provide tiered pricing on 10-seed and 20-seed packs. For wholesale or bulk enquiries beyond our standard pack sizes, please contact our team directly for a custom quote.

Seeds are supplied in sealed packaging suitable for storage. Keep them cool, dark and dry until you are ready to use them — a sealed container in a fridge is ideal, though not a freezer.

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Yes. You must be at least 18 years of age (or the minimum legal age in your state or territory) to purchase from our store.