Watermelon cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 17%
🌙 Sleep Aid
IndicaFeminisedIn Stock

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.

Select Pack Size
€12.32EUR
1
🇮🇪Free Irish Delivery
🌱Germination Promise
🔒Unmarked Packaging
⚗

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.

Germination rate: 97.9% (n=225)
Last QC test date: 2026-09-11
Indoor yield: 452-564 g/m² (avg across 12 verified grower reports)
Outdoor yield, Ireland: 426-682 g/plant (avg across 7 verified grower reports)

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.

Effects

😊Happy
72% of people reported feeling Happy
😌Relaxed
65% of people reported feeling Relaxed
😴Sleepy
65% of people reported feeling Sleepy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Best For

✦ Evening
✦ Insomnia
✦ Pain
✦ Stress

Strain Type

Indica 80%Sativa 20%

Strain Data Sheet

🧬THC17% - 21% (Medium-High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestSept – Nov, S. hemisphere (typical)
📏Height80-130 cm
⚖️YieldTypical for type
🏠Yield IndoorUp to 400g per m2
🌳Yield Outdoor450 - 500 gr/plant
⏱Flowering Time50-55 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers are responsible for complying with the law where they live.
1
Watermelon Feminised
royalkingseeds.ie
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

501st OG cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 18%
🌙 Sleep Aid

501st OG Feminised

RelaxedSleepyHappy
▼
€10.95EUR
8 Ball Kush cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 14%
🌙 Sleep Aid

8 Ball Kush Feminised

RelaxedSleepyHappy
▼
€10.95EUR
Alien Gorilla Glue cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 18%
🌙 Sleep Aid

Alien Gorilla Glue Feminised

RelaxedSleepyHappy
▼
€10.04EUR
Americano cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 20%
🌙 Sleep Aid

Americano Feminised

RelaxedSleepyHappy
▼
€10.04EUR

Watermelon Feminised — Breeder Information

Royal King Genetics

Bred 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.

Stabilisation Level
BX2
Generations
3+
Breeding Programme
Backcross Stabilisation (BX2) — modern hybrid fixing
Stabilisation Notes — What This Means for Your Grow

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.

Breeding Goal

Fix parent-cut traits in Watermelon without narrowing the population too far.

Selection Focus

Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.

Pollen / Mother Source

Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
10 September 2026· 99%+ germination