
Lemon Jack Feminized
Lemon Jack Feminized cannabis seeds for UK growers. Sativa · 15% THC · energetic, focused, happy. Discreet UK delivery, priced in GBP.
About Lemon Jack Feminized
Germination & Early Veg (Days 1-14): Lemon Jack seeds typically crack within 48 hours using the damp paper towel method and break soil by around day 3. Early growth was rapid and upright — narrow first leaves reaching eagerly towards the light from day one. By the end of week two, five nodes were visible with noticeable spacing between each, signalling the sativa-dominant growth pattern ahead. Damping off is uncommon at around 70% relative humidity during this phase.
Vegetative Growth (Weeks 3-6): Vertical growth demanded attention. Even with low-stress training started in week 3, this plant wanted to climb. We bent the main stem at a 90-degree angle in week 4 and the secondary branches quickly caught up, creating a naturally flat canopy by week 6.
Flower (Weeks 1-75): This is where the 25/75 genetics of Lemon Jack truly revealed itself. The pinene aroma appeared in week 3 of flower and intensified steadily. Trichome coverage became visually striking from week 5 onward. Final indoor yield: up to 400 g/m2. THC testing at 15%. Difficulty rating: intermediate.
Continuing the Grow Diary
Mid-Flower (Weeks 4-6): The transformation accelerated dramatically. Bud sites that were wispy clusters at week 3 swelled into properly defined colas. The elongated bud structure continued developing lengthwise, with fresh calyxes stacking along the main stems. Interestingly, the secondary branches produced proportionally larger buds than expected — the open structure allowed light to reach lower sites that a bushier plant would have shaded out entirely.
Late Flower and Ripening (Weeks 73-75): Nutrient input dropped to plain water with a splash of molasses for the final 10 days. The pinene aroma became powerful enough that carbon filtration was essential — our neighbours would have noticed otherwise. Trichomes progressed from clear to milky across the final fortnight, with amber heads appearing on sugar leaves first. A common harvest window is around 15% amber on the calyxes.
Dry and Cure (Post-Harvest): Whole-plant hang dry in a darkened room at 17°C and 58% humidity for 12 days. Stems snapped cleanly rather than bending, confirming the moisture content was appropriate for jarring. After 4 weeks of glass jar curing with twice-daily burping (first 2 weeks) then daily burping (weeks 3-4), the bouquet fully developed. Final weight confirmed the up to 400 g/m2 yield estimate. The limonene secondary terpene became far more pronounced after curing than it was at harvest — a reminder that the drying and curing process genuinely creates flavour rather than merely preserving it.
Flowering: 65-75 days. Indoor yield: up to 400 g/m2. Outdoor yield: up to 450 g/plant. Rated intermediate difficulty. Feminised seeds.
Flavour, Aroma, and Experience
The sensory arc of Lemon Jack unfolds in stages. Initial inhalation at 15% THC brings a clean, resinous freshness reminiscent of pine woodland after rain. The energetic, focused, happy effects emerge within minutes, arriving as a noticeable sharpening of sensory perception. Colours look more saturated, music sounds richer, and conversations take interesting tangential paths. This cerebral engagement sustains for 2-3 hours with a gentle plateau rather than a sudden peak and crash. The limonene secondary terpene adds a distinct layer: a mood-elevating brightness that counterbalances any heaviness.
Terpene Breakdown
Primary: Pinene · Secondary: Limonene · Tertiary: Caryophyllene. Together these three compounds construct an aromatic signature that evolves throughout the curing process. Freshly dried flower leads with pinene presence, but after three to four weeks in sealed glass jars at 16-18°C, the caryophyllene undertone strengthens and the overall bouquet develops a layered complexity. Vaporisation between 180°C and 195°C captures the broadest spectrum of these terpenes — higher temperatures degrade the more volatile caryophyllene molecules first.
Suitability and Recommendations
Who grows Lemon Jack successfully? Indoor growers seeking full control over their harvest timeline. Outdoor cultivators who want to decide exactly when flowering begins. Anyone with the space and patience to vegetate this plant to its full potential before triggering bloom. Difficulty is rated intermediate, meaning a moderate learning curve that rewards attention without demanding laboratory-grade conditions. Delivered UK-wide in discreet, unbranded packaging with germination guarantee included.
Effects
Strain Type
Strain Data Sheet
Packaging
Feminized Premium
Seeds
authenticity
lining
number
Related Strains

Strawberry Milkshake Feminized
Grow Strawberry Milkshake Feminized in the UK. Hybrid genetics at 19% THC, known for relaxed, happy, euphoric effects.

Fruity Pebbles Feminized
Grow Fruity Pebbles Feminized in the UK. Hybrid genetics at 20% THC, known for uplifted, happy, relaxed effects.

Jane Doe Feminized
Jane Doe Feminized cannabis seeds for UK growers. Hybrid · 23% THC · relaxed, euphoric, calm. Discreet UK delivery, priced in GBP.

Gorilla Cookies Feminized
Gorilla Cookies Feminized seeds. A indica cultivar at 24% THC delivering euphoric, creative, calm. Grow figures from named sources.
Lemon Jack Feminized — 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.
F3 stabilisation on the Lemon Jack cross. Three rounds of selection have brought the population to roughly 80% trait homogeneity — a small fraction of pheno variance is still present and is being culled in the next cycle.
Cull off-type phenos in Lemon Jack at F3 to lock the cross profile.
Chosen for sativa vigour, bud-to-leaf ratio and the distinctive terpene character of the original cut.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.