Keep the greenhouse cool

Managing the heat helps keep plants healthy, says Ruth

- Ruth Hayes

WORKING in the greenhouse, even for a short time, can be uncomfortably hot at this time of year – so spare a thought for plants in there the whole time.

Many of us use the greenhouse for tomatoes, aubergines, cucumbers, chillies and other tender crops through the summer, but strong sunlight, heat and a dry atmosphere can damage them.

The solution is to monitor and manage the heat; there are several ways of doing so and it isn’t too late to start now. Use netting or wash-off shading paint to filter out the harshest light and reduce the risk of scorched plants.

Water consistently to ensure the smooth and equal transference of moisture and nutrients around the plants.

This is particularly important with tomatoes to avoid the condition blossom end rot, caused by unequal circulation of calcium around the plants.

Water regularly but do not overwater, especially if using peat-free composts. If you are unsure, check moisture levels in growbags and pots by inserting a finger into the compost before watering.