
Watermelon Feminised
Order Watermelon Feminised seeds online in Ireland. A quality indica cultivar at 17% THC delivering happy, relaxed, sleepy. Chosen for a short season and a damp finish. Fast shipping and a germination guarantee.
Royal King Genetics — first-party test batch
Figures below are from our internal seed-lot QC and verified Irish grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-11 on 225 seeds at 20-23°C.
About Watermelon Feminised
Does Watermelon finish outdoors in Ireland? It does, planted out at the end of May and cut by early October. A compact 80/20 plant is easier to shelter and easier to hide, though the density that makes it worth growing is also what holds water after rain. Bloom takes 50-55 days, so the harvest date is set by the calendar far more than by your technique.
What should I expect to take off it? Up to 400g per m2 indoors and 450 - 500 gr/plant outdoors are the published figures, and both assume a full light or a full season plus a root run to match. A tunnel gets you most of the way to the outdoor number; a windowsill will not. At 17% THC the effort is well spent either way.
Is it a sensible first grow? Reasonably. Anyone who has finished one grow will manage this one; it asks for consistency rather than expertise.
Other questions that come up about Watermelon
Soil or coco? Coco with fertigation at EC 1.4-1.8 through bloom if you are there daily and want speed. Peat-free soil with slow amendments — fish, blood and bone, seaweed meal, rock phosphate — if you are not, and want flavour. Both suit this indica; the deciding factor is your week, not the plant.
How does it handle the weather here? The dense canopy shades itself, which is useful on the handful of genuinely warm days and a liability in a wet week. Mulch the root zone, water early, and keep air moving underneath.
When does bloom feed start? Within a week of the first pistils. The 80/20 balance shifts demand quickly at the transition — phosphorus and potassium up, nitrogen down. Soil growers top-dress; coco and hydro switch formula immediately.
Tunnel, outdoors or indoors? A tunnel is the best value of the three here. Indoors you own the 50-55 days of bloom completely; outdoors the plant gets light no lamp matches and can reach 450 - 500 gr/plant, and pays for it in rain. Flowering: 50-55 days. Indoor yield: Up to 400g per m2. Outdoor yield: 450 - 500 gr/plant. Plant height: 80-130 cm. Rated easy difficulty.
What Watermelon is like in practice
The catalogue lists happy, relaxed, sleepy, and that matches what growers here report back. At 17% THC this indica sits where the dose is the whole question. One bowl through a vaporiser at 185°C leaves the head working and the body easy, which is what most people are after on a weeknight. More than that moves it firmly towards sedation. The Myrcene and Humulene together leave earth and faint sweetness, with fruit at the end.
Suited to evenings in, recovery after work, and the hour before sleep.
Terpene breakdown
Primary: Myrcene · Secondary: Humulene · Tertiary: Linalool. The three shift relative to each other across the cure. Straight off the dry the myrcene dominates; three or four weeks sealed in glass at 16-18°C and the linalool underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter linalool molecules first.
Who it suits
Watermelon suits growers with the fundamentals in place. Understand pH, rough nutrient ratios and a light cycle before committing to it; it asks for competence rather than expertise. Photoperiod genetics leave plant size and harvest date under your control — veg longer for a bigger plant, or flip early when the ceiling is low. A bloom of 50-55 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.
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Watermelon Feminised — Breeder Information
Royal King GeneticsBred and stabilised in-house by Royal King Genetics — our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read the full breeding process and about page.
Watermelon carries clone-derived parents from the recent-era. We backcrossed twice to the dominant parent (BX2) to weld cut-specific traits into seed-stable form. Vigour and tight finish window run uniform across the population.
Fix parent-cut traits in Watermelon without narrowing the population too far.
Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.