Sour Jack Feminized

Germination & Early Veg (Days 1-14): Sour 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 1-12): This is where the 18/82 genetics of Sour Jack truly revealed itself. The limonene aroma appeared in week 3 of flower and intensified steadily. Trichome coverage became visually striking from week 5 onward. THC testing at 15%. Difficulty rating: intermediate.

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 10-12): Nutrient input dropped to plain water with a splash of molasses for the final 10 days. The limonene 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. The pinene 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: 9-12 weeks. Rated intermediate difficulty. Feminised seeds.

The sensory arc of Sour Jack unfolds in stages. Initial inhalation at 15% THC brings a bright, almost sparkling citrus note that lifts the palate. The uplifted, energetic 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 pinene secondary terpene adds a distinct layer: a mental alertness that keeps cognition crisp.

Primary: Limonene · Secondary: Pinene · Tertiary: Terpinolene. This particular terpene trio appears frequently in award-winning cultivars and produces a nose that most UK growers find immediately appealing when jars are first opened after curing. The limonene dominance anchors the aroma, pinene provides mid-range character, and terpinolene contributes a subtle background note that distinguishes this strain from others sharing the same primary terpene.

Who grows Sour 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.