Once or twice a day and more often in very hot weather, water the trays or tubes with the shadehouse sprays. Always keep the mix moist to avoid go-stop-go germination caused by drying out. If the mix dries out after seed begins to sprout, many seedlings will die.

However, it is critical that you avoid over-watering and long periods of sodden mix, as this promotes fungal growth which could lead to heavy plant losses.

Check trays and tubes regularly for germination, and be prepared to take quick action at the first sign of disease or attack by pests such as slugs.