Growing

AllautumnCropscucumbersdiseasegreenhouse growingGrowinggrowing guidegrowing-guideharvestNLpestspollinationsaladsseasonalsowingsowing-calendarspringsummersummer cropstomatoestroubleshootingventilationwateringwinter
All autumn Crops cucumbers disease greenhouse growing Growing growing guide growing-guide harvest NL pests pollination salads seasonal sowing sowing-calendar spring summer summer crops tomatoes troubleshooting ventilation watering winter
A greenhouse cucumber plant with a white powdery-mildew film dusting the upper leaf surfaces

Powdery Mildew on Greenhouse Cucumbers: Stop the Spread

— Waldenhaus Team
Tagged: cucumbers growing-guide pests troubleshooting
White powder on cucumber and courgette leaves looks like someone dusted them with flour, and the first instinct is usually to blame damp. That instinct gets powdery mildew on cucumbers...
Whiteflies on the underside of a greenhouse tomato leaf with a yellow sticky trap behind

Whitefly Under Glass: How to Actually Clear It

— Waldenhaus Team
Tagged: growing-guide pests troubleshooting
Reach for the spray can and you will lose this fight. Greenhouse whitefly survive contact insecticides because two of their life stages, the egg and the non-feeding pupa, shrug them...
Close-up of a leaf with fine pale stippling and silk webbing along the edge, the sign of red spider mite

Red Spider Mite in the Greenhouse: Spot It and Stop It

— Waldenhaus Team
Tagged: growing-guide pests summer troubleshooting
Most greenhouse trouble in a heatwave gets blamed on the watering can, so the fix feels obvious: hold off, dry things out, let the air move. Red spider mite turns...