The purpose of a greenhouse is to retain light and heat, providing the right conditions for plants to grow. However, ventilation is also very important. If air becomes too stagnant and humid, this creates an environment for harmful fungi to grow. The right amount of ventilation will also prevent a greenhouse from becoming too hot which is also bad for plants.
Greenhouses can sometimes start to leak. If you notice any areas where this is happening, try to fix them as soon as possible to prevent moisture accumulation, fungi or other harmful pathogens. This will also help to prevent insects.
During very cold months an electric heater is often needed in a greenhouse. To ensure it does not become a fire risk, only use heaters intended for greenhouses. Any other electrical items you will be using should be suitable for outside use and have a waterproof cover. Keep all electrical items unplugged and safely stored when not in use.
We often store different items in a greenhouse such as garden tools and pesticides, etc. These would be very dangerous if children were to get their hands on them. If small children are in the home or frequently visit, make sure the greenhouse has a lock on it so that they cannot access these items.
While there are many more ways to keep a greenhouse safe and well maintained, these few suggestions will help to keep it a pleasant environment for both plants and humans.