A greenhouse needs to be maintained all year round to get the best growth of your crops and plants inside. Winter in particular is a more difficult season to maintain your greenhouse.
As well as internal temperature control and ventilation, you need to make sure you keep the pests at bay during the winter months. Small slugs and snails are drawn to the warm interior of a greenhouse compared to staying outside in the cold and frosty weather.
Remember to check all of your crops and plants to make sure they have not been contaminated by slugs, snails or any other pests. Contamination to your greenhouse can result in poor growth of your plants and even cause them to die. Make sure you have adequate pesticide in your greenhouse and on your plants. You can also apply slug repellent to keep these away from the crops and plants within the greenhouse.