The first and most popular accessory for a greenhouse is an automatic vent opener. When temperatures outside exceed that inside, it will open and let cool air into your greenhouse to prevent overheating. An even better option is an auto-vent that can be set to open and close based on temperature or other factors such as light, humidity and moisture levels.

A rain gauge is another important accessory for greenhouses. It lets you keep track of how much rain has fallen while still protecting your plants from excessive rainfall.

Lastly, you should look at solar panels if you’re interested in reducing your use of fossil fuels while operating your greenhouse year-round.