Greenhouse heaters are devices designed to maintain a warm environment inside a greenhouse, promoting plant growth even in cold weather. They work by generating heat, which helps to regulate the temperature and humidity levels, ensuring that plants receive the optimal conditions for growth. Common types of greenhouse heaters include electric, gas, and propane heaters. These heaters can be essential for extending the growing season and protecting sensitive plants from frost. By using a greenhouse heater, gardeners can create a stable climate that supports various plants, including flowers, vegetables, and herbs, throughout the year.