Caring for cold frame vegetables
Gardening in a cold frame is much the same as growing vegetables in a garden. The plants need sun, water, and good air circulation. A south-facing cold frame should provide plenty of light. As for soil moisture, pay attention and water when the soil is dry. On a rainy day, the top can be opened to allow for natural irrigation.
It’s also essential to vent the frame to prevent overheating. When the outside temperature is above 4 C and the sun is out, prop the frame open. It’s amazing how quickly the temperature inside a frame can rise on a mild day. By late spring, the cold frame top can be left open during the day and only closed at night or if the weather is bad.