Harlequin

Provide 20–24°C during lights-on, slightly cooler at night, relative humidity around 40–50% in flowering, and good air circulation to limit mould.

Start with a light nutrient feed and increase to moderate levels during the vegetative phase; reduce nitrogen and keep phosphorus/potassium steady in flowering.

In cooler UK regions aim for late September to early October depending on local microclimate and trichome development.

Basic integrated pest management is usually sufficient; check regularly for spider mites and aphids and maintain cleanliness in the grow room.

Yes, it responds well to organic soils and slow-release feeds but watch moisture levels carefully to avoid fungal issues.

Use 18/6 for veg and switch to 12/12 to initiate flowering; consistent light cycles reduce stress and promote even bud set.

Use 7–11 litre pots for a balance between root space and manageability, larger if you plan a longer vegetative period.

Prioritise insulation, stable heating, and dehumidification to maintain 20–24°C and 40–50% RH; ensure strong ventilation to keep airflow moving and prevent damp spots.

Harlequin suits SCROG well due to its long internodes and tends to produce better yields with training; SOG can work but requires many clones.

Dry slowly at 16–20°C and 50–60% RH for 7–14 days, then cure in jars with daily burping for the first two weeks to develop aroma and smoothness.