M-39 Feminised

Here is what M-39 delivers at harvest: 350-450 gr per square metre indoors, 500 gr per plant outdoors in Irish conditions, with resin production peaking at 16% THC. Those numbers tell a story when you work backwards through the 39-43 days window. Weight distribution across the 39-43 days cycle is pleasingly even, with a noticeable surge in the closing two weeks that rewards growers who resist harvesting prematurely. The 60/40 balance means you get both calyx stacking density and respectable trichome spread. For outdoor growers, the ideal harvest window lands between mid-September and the first week of October — late enough to capture the full caryophyllene terpene development, early enough to beat the autumn rain that ends the Irish season.

To reach the upper end of this strain's yield potential (350-450 gr indoors, 500 gr outdoors), focus your efforts on three critical windows during the 39-43 days period.

Window 1: The first 10 days after flowering begins. Stretch management determines canopy uniformity, which directly impacts light distribution and final yield. Moderate 30-40% stretch is typical. One round of low-stress training on the tallest shoots keeps everything level.

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. Outdoors in Ireland the sea keeps that swing narrow — a maritime climate has a smaller diurnal range than a continental one, and the midland counties away from the coast are the only places that reliably deliver it. 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 10-15% amber for a balanced effect. Outdoor growers: this window typically falls through the second half of September.

Flowering: 39-43 days. Indoor yield: 350-450 gr. Outdoor yield: 500 gr. Plant height: Short. Rated easy difficulty.

Irish users report creative, happy, talkative as the defining characteristics, and our experience aligns with that consensus. At 16% THC, this hybrid sits in a potency bracket where versatility is the main advantage. Morning users report functional clarity at lower doses. Evening users report satisfying relaxation at higher doses. The 60/40 balance means the dominant effect direction shifts with consumption amount rather than being locked into a single character. The Caryophyllene/Myrcene terpene combination imparts a flavour that lingers on the palate — warm and spiced, drying slightly on the exhale.

Ideal settings: adaptable across occasions — adjust dose to match the energy level your situation calls for.

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Humulene. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188°C) highlights the myrcene and humulene 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.

M-39 suits growers with fundamental skills already established. You should understand pH management, basic nutrient ratios, and light cycle requirements before committing to this cultivar — it will not hold your hand, but it will not punish minor mistakes harshly either. Photoperiod genetics give you complete control over plant size and harvest timing — extend the vegetative phase for larger plants or flip early for a quicker turnaround in compact spaces. The Irish growing season (September through May) accommodates the 39-43 days bloom period comfortably for outdoor growers in the warmer, frost-free counties. Shipped discreetly within Ireland with sourced grow figures on every strain page.