The temperature inside a green house can quickly rocket out of control on sunny days in spring and summer, sometimes soaring to over 120 degree Fahrenheit. Equally, in winter it can drop low enough to cause damage to frost tender plants. Use the following strategies to keep the temperature in the greenhouse under control. There are three basic methods you can use to prevent overheating in the greenhouse, ventilation, shading and damping down. Providing ventilation is the best way to control temperatures during the early days of spring. Opening a roof vent and a vent in the side of the greenhouse will allow the hot, humid air that has risen to the top of the greenhouse to escape, while at the same time drawing cooler, dryer air through the side vents.
