HOW TO GET THE MOST OUT OF YOUR PROPAGATOR
Thoroughly clean seed trays and propagator lids before bringing them into use, ideally using a disinfectant such as Jeyes Fluid. Not only will a good wash eliminate overwintering pests and diseases, but a clean propagator lid will maximise light transmission, which is essential for healthy growth of seedlings.
If compost has been stored in a cold greenhouse or shed, bring it indoors 24 hours before sowing, so it warms to room temperature.
Fill trays or pots with quality seed and cuttings compost. It’ll contain the optimum balance of nutrients to help seeds germinate, while retaining the right level of moisture to ensure seeds don’t rot.
Overwatering seedlings (as well as sowing too densely) in propagators can lead to damping off, where seedlings rot and keel over. There’s a higher risk of damping off when sowing early in the year, as the fungi responsible thrive when light levels are low and compost temperatures are cooler.
Take care not to overwater seeds and seedlings in propagators. Lightly misting the surface of the compost will suffice. Use tap water on seeds and seedlings, and never water from a water bu , which can contain pathogens.
If your propagator has vents, keep them closed until seeds have germinated. Check daily, and once seedlings emerge, open the vents by day, eventually removing the lid. Better air circulation helps to reduce the risk of damping off during the critical period when seedlings are putting down roots.
If seedlings become too leggy (tall and spindly), remove propagator lids in the morning and replace them at night.