It’s important to maintain an appropriate temperature and humidity level within your greenhouse, and there are a few ways to do this. A thermometer is a must to monitor the temperature, which should stay around 80 to 85 degrees Fahrenheit. When it gets too hot, it’s important to open vents and turn on any fans to help cool the space. You also can prop the door open or use a shade cloth to maintain the temperature. Proper ventilation also helps control humidity levels. You should take care not to overwater plants to prevent the space from getting too humid. Bugs can infest your greenhouse, so stay on top of pest control, inspecting new plants for bugs before you bring them in. It’s also important to wash the greenhouse's interior and exterior panels at least once a year to keep them clean. If too much grime accumulates, it can prevent sunlight from reaching your plants.