Granddaddy Purple Feminized

Here is what Granddaddy Purple delivers at harvest: up to 500 g/m2 per square metre indoors, up to 600 g/plant per plant outdoors in UK conditions, with resin production peaking at 17-23% THC. Those numbers tell a story when you work backwards through the 8-10 weeks window. The bulk of your final weight accumulates during weeks 5 through 8 — a period where the 80/20 genetics stack calyxes rapidly and trichome coverage shifts from scattered to frosted. Southern Hemisphere outdoor growers targeting a late-March harvest should calculate their flip date (or natural light trigger) accordingly, aiming for buds to enter this critical fattening stage during February when UK daylight hours are still generous.

To reach the upper end of this strain's yield potential (up to 500 g/m2 indoors, up to 600 g/plant outdoors), focus your efforts on three critical windows during the 8-10 weeks period.

Window 1: The first 10 days after flowering begins. Stretch management determines canopy uniformity, which directly impacts light distribution and final yield. Expect modest stretch of 20-30% — a quick defoliation of lower fan leaves at day 7 redirects energy to developing bud sites.

Window 2: Weeks 3-5 of bloom. Caryophyllene terpene biosynthesis ramps up during this period. Maintain a day/night temperature differential of at least 6-8°C to encourage terpene accumulation — UK autumn evenings (March-April) naturally provide this swing for outdoor growers. Indoor cultivators should target 25-26°C during lights-on and 18-20°C during lights-off. Supplement with potassium-heavy bloom nutrients at EC 1.6-1.8.

Window 3: Final 10-14 days before harvest. Cease all nutrient input and flush with pH-adjusted water. Monitor trichomes daily with a 60x jeweller's loupe — harvest at 15-20% amber for the full-bodied effect this genetics is known for. Southern Hemisphere outdoor growers: this window typically falls in late March through mid-April.

Flowering: 8-10 weeks. Indoor yield: up to 500 g/m2. Outdoor yield: up to 600 g/plant. Rated intermediate difficulty.

The sensory arc of Granddaddy Purple unfolds in stages. Initial inhalation at 17-23% THC brings a warm peppery spice that tingles at the back of the throat. The relaxed, sleepy, euphoric effects emerge within minutes, beginning as a pleasant heaviness behind the eyes that migrates downward through the shoulders, chest, and limbs. By the fifteen-minute mark, a deep physical stillness sets in — not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The myrcene secondary terpene adds a distinct layer: additional body depth that reinforces the physical dimension.

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188°C) highlights the myrcene and bisabolol notes whilst keeping caryophyllene as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience — still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Who grows Granddaddy Purple 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.