Mould Prevention

Mould prevention starts with humidity and airflow

Botrytis and powdery mildew both need still, damp air to establish — get humidity and air movement right in flower and most mould problems never start. Dry Bag (£6.50) and Dry Pot (£7.50) disposable dehumidifiers are a cheap first step for a small tent, pulling excess moisture out of the air passively without running powered kit. For anything larger, proper humidity control equipment holds RH in range rather than just nudging it down.

Alongside environmental control, Plant Vitality BPM (£18.95) targets botrytis and powdery mildew directly, Silver Bullet Mist (£12.95) is a preventative spray for regular use through flower, and Hot Box Sulfume Sulphur Vaporiser (from £24.95) treats a wider grow space against mildew spores rather than individual plants.

Buying advice

Tight, dense colas trap moisture at the centre where you can't see it — good airflow between and through plants matters as much as the humidity reading on your meter. Late flowering is the highest-risk stage, since RH targets drop to 35-45% precisely because dense buds are most vulnerable then. Free UK delivery over £50, or call 020 3488 0419 for advice on your specific setup.