Birthday Cake Kush cannabis seeds packaging — Royal King Seeds Ireland
Hybrid
THC 20%
🎨 Creative
HybridFeminisedIn Stock

Birthday Cake Kush Feminised

Order Birthday Cake Kush Feminised seeds online in Ireland. A quality hybrid cultivar at 20% THC delivering euphoric, relaxed, uplifted. Chosen for a short season and a damp finish. Fast shipping and a germination guarantee.

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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 2026-09-17 on 375 seeds at 20-23°C.

Germination rate: 98.8% (n=375)
Last QC test date: 2026-09-17
Indoor yield: 450-606 g/m² (avg across 10 verified grower reports)
Outdoor yield, Ireland: 468-738 g/plant (avg across 9 verified grower reports)

About Birthday Cake Kush Feminised

Does Birthday Cake Kush finish outdoors in Ireland? It does, planted out at the end of May and cut by early October. The 60/40 balance handles an Irish season without special treatment, which is most of the reason to choose it. Bloom takes 55-65 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 450 g/m2 indoors and up to 550 g/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 20% 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 Birthday Cake Kush

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 hybrid; the deciding factor is your week, not the plant.

How does it handle the weather here? Hybrid vigour covers most of what an Irish summer does. Keep the root zone under 28°C and do not transplant into a warm spell.

When does bloom feed start? Within a week of the first pistils. The 60/40 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 55-65 days of bloom completely; outdoors the plant gets light no lamp matches and can reach up to 550 g/plant, and pays for it in rain. Flowering: 55-65 days. Indoor yield: up to 450 g/m2. Outdoor yield: up to 550 g/plant. Plant height: Short. Rated intermediate difficulty.

What Birthday Cake Kush is like in practice

The catalogue lists euphoric, relaxed, uplifted, and that matches what growers here report back. At 20% THC this hybrid sits where the balance is the argument for it. Small doses stay functional, larger ones relax properly, and the 60/40 split means the direction is set by the amount rather than fixed by the plant. The Myrcene and Limonene together leave earth and faint sweetness, with fruit at the end.

Suited to most occasions, with the dose doing the steering.

Terpene breakdown

Primary: Myrcene · Secondary: Limonene · Tertiary: Pinene. This is a combination that turns up repeatedly in cultivars people rate, and it is usually what gets commented on when a jar is opened for the first time after a proper cure. Myrcene anchors it, limonene holds the middle, and pinene sits behind both — the last of those being what separates this from other strains leading on the same terpene.

Who it suits

Birthday Cake Kush 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 55-65 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
😌Relaxed
65% of people reported feeling Relaxed
😎Uplifted
58% of people reported feeling Uplifted
😊Happy
51% of people reported feeling Happy
🤩Creative
50% of people reported feeling Creative
🤤Hungry
41% of people reported feeling Hungry
😴Sleepy
38% of people reported feeling Sleepy
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Best For

✦ Anytime
✦ Depression
✦ Inflammation
✦ Stress

Strain Type

Indica 60%Sativa 40%

Strain Data Sheet

🧬THC20% - 25% (High)
🌿LineageGirl Scout Cookies × Cherry Pie
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestSept – Nov, S. hemisphere (typical)
📏HeightShort
⚖️YieldMedium – High
🏠Yield Indoorup to 450 g/m2
🌳Yield Outdoorup to 550 g/plant
⏱Flowering Time55-65 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.
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Birthday Cake Kush Feminised
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Birthday Cake Kush 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
BX3
Generations
4+
Breeding Programme
Three-Generation Backcross Programme — recurrent-parent fixing
Stabilisation Notes — What This Means for Your Grow

Three rounds of backcrossing to the parental line have welded the Birthday Cake Kush cut into the population. The terpene fidelity that made the original mother famous now expresses across the whole pack — not just in one or two lucky phenos.

Breeding Goal

Recreate the Birthday Cake Kush clone-only cut in stable seed form.

Selection Focus

Chosen for vigour, terpene saturation and a tight finish window that allows production planning.

Pollen / Mother Source

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

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