P90

Start with a balanced vegetative feed and switch to bloom formula at the onset of flowering, reducing nitrogen while keeping potassium and phosphorus consistent.

Maintain good airflow, avoid overwatering, and remove dense inner foliage; in wet summers consider a covered outdoor spot or early harvest to avoid prolonged damp exposure.

P90 suits growers who have basic experience with training and humidity control; complete novices may struggle with mould management in variable weather.

Topping combined with low-stress training (LST) or a SCROG setup flattens the canopy and increases bud sites without overly stretching the plant.

Monitor trichomes from week eight onward and plan to harvest by late September to October in the UK, adjusting for local microclimate.

Dry slowly in a cool, dark space at 45–55% relative humidity and cure in sealed jars with regular burping for at least two weeks to improve flavour and smoothness.

Spider mites and aphids are common indoors, while outdoor plants can attract caterpillars and slugs; regular inspection and integrated pest management work well.

It tolerates mild coastal conditions but watch for salt spray and high winds; a sheltered microclimate helps preserve trichomes and resin.

Increase vertical spacing, improve ventilation, use dehumidifiers indoors and keep dense foliage trimmed to reduce pockets of stagnant air; these practices support humid climate cannabis growing.

Base nutrients are similar but hydro systems require more frequent, smaller feedings and tighter pH control to prevent lockouts.