Lemon Thai cannabis seeds packaging — Royal King Seeds UK
Hybrid
THC 21%
🎨 Creative
HybridFeminisedIn Stock

Lemon Thai Feminised

Feminised PhotoperiodSee Lab Report →

Lemon Thai Feminised — hybrid cannabis seeds suited to UK growing conditions. 21% THC with energetic, focused, happy effects. Fast, discreet UK delivery.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified UK grower submissions, not breeder marketing. Determined from a single batch tested 2026-08-31 on 425 seeds.

Germination rate: 99.1% (n=425)
Last QC test date: 2026-08-31
Indoor yield: 427-602 g/m² (avg across 15 verified grower reports)
Outdoor yield: 557-740 g/plant (avg across 10 verified grower reports)

About Lemon Thai Feminised

Cured properly and opened cold, Lemon Thai leads with caryophyllene: dry black pepper that catches at the back of the throat, clove and warm wood underneath it. Underneath it myrcene adds depth and weight low down in the profile, and it reads mid-palate rather than on the first pass. This 60/50 hybrid tests at 21% THC, but potency is the least interesting number here: what separates Lemon Thai from the others on the same shelf is how the aroma behaves across a cure, and that is a question of storage and patience rather than genetics alone.

Growing it for the nose rather than the scales

Chasing terpene expression in Lemon Thai pulls against chasing yield, and it is worth knowing which one you are doing before you start. The Caryophyllene/Myrcene/Humulene profile does its best work in living soil, where the microbial side produces secondary compounds a bottle cannot. That is easier here than it sounds: decent peat-free compost and worm castings are a garden centre purchase in most British towns.

Through the 55-65 days of bloom, stop foliar spraying after week two — anything landing on developing trichomes is still there at harvest and you will taste it. The final three weeks decide which terpenes dominate the cured flower: nights held at 16-18°C push caryophyllene forward, while a warmer finish protects the lighter humulene notes at the top.

The cure is where most of the flavour is lost in this country, and the reason is the weather. A 10-14 day hang wants 15-18°C at 55-60% relative humidity, which a British autumn will not give you in a spare room — a temperature-controlled cupboard or a wine fridge set to 16°C solves it for the price of one wasted harvest. Then into glass, burped twice a day for the first fortnight. The myrcene layer that makes this one worth growing does not appear until somewhere between weeks three and four in the jar.

Flowering: 55-65 days. Indoor yield: up to 400 g/m2. Outdoor yield: up to 800 g/plant. Rated intermediate difficulty.

What Lemon Thai is actually like

Growers report energetic, focused, happy as the defining characteristics and our own notes agree. At 21% THC this hybrid sits where the balance is the selling point. Taken small it stays functional; taken larger it relaxes properly. The ${indica}/${sativa} split means the direction is set by how much you take rather than fixed by the genetics. The Caryophyllene/Myrcene pairing leaves warmth and spice that dries slightly on the exhale.

Best suited to most occasions — the dose does the steering.

Terpene breakdown

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Humulene. How this profile survives the journey from flower to vapour depends on temperature. Low vaporisation, 180-188°C, keeps the myrcene and humulene audible over the caryophyllene base. Run it hotter, or burn it, and the three collapse into one note — pleasant enough, but none of the complexity that made it worth choosing.

Who it suits

Lemon Thai suits growers with the basics in place. Understand pH, rough nutrient ratios and light cycles before you commit to it; it asks for competence rather than expertise. Photoperiod genetics leave plant size and harvest date under your control — veg longer for bigger plants, or flip early when space is short. The April to October season accommodates a bloom of 55-65 days comfortably for outdoor growers across the country.

Effects

🤑Energetic
71% of people reported feeling Energetic
🧠Focused
69% of people reported feeling Focused
😊Happy
58% of people reported feeling Happy
😌Relaxed
51% of people reported feeling Relaxed
🤩Creative
50% of people reported feeling Creative
🤗Euphoric
40% of people reported feeling Euphoric
😎Uplifted
31% of people reported feeling Uplifted
🤤Hungry
27% of people reported feeling Hungry
😴Sleepy
24% of people reported feeling Sleepy

Strain Type

Indica 60%Sativa 50%

Strain Data Sheet

🧬THC21% - 25% (High)
🌿LineageThai Landrace × Hawaiian
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height100 – 160 cm (typical)
⚖️YieldMedium – High
🏠Yield Indoorup to 400 g/m2
🌳Yield Outdoorup to 800 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 must comply with all applicable United Kingdom legislation.
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Lemon Thai Feminised
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🛡️Aluminium interior lining
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Lemon Thai 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
F4
Generations
4+
Breeding Programme
Filial Stabilisation (F4) — four-generation selection
Stabilisation Notes — What This Means for Your Grow

Four rounds of filial stabilisation on the Lemon Thai cross. The flavour saturation expression sits uniform; pheno-to-pheno yield variation runs within ±10% of the published numbers.

Breeding Goal

Cull off-type phenos in Lemon Thai through filial selection.

Selection Focus

Chosen for trichome density, bud structure and the hybrid trait balance the cross was engineered for.

Pollen / Mother Source

Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.

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