Cold Frames

A cold frame provides a sheltered growing space for seedlings, young plants and other plants that may benefit from additional protection from the weather. Cold frames can also be useful for hardening off plants before moving them into a more exposed position in the garden.

A cold frame can be useful at different times of the year, although how you use it will depend on the plants you’re growing and the weather conditions. During cooler periods it can provide additional shelter, while in warmer weather you’ll need to pay particular attention to ventilation and temperature.

Yes. Temperatures inside a cold frame can rise considerably in sunny weather, so appropriate ventilation is important. Many designs allow the lid to be opened or raised to increase airflow. Check your plants and conditions regularly rather than leaving the cold frame permanently closed.

Yes. A cold frame can provide a useful transitional space when hardening off plants that have been raised in more protected conditions. By gradually increasing ventilation and exposure over a period of time, tender young plants can become accustomed to outdoor conditions before being moved to their final position.

Position your cold frame on a firm, level and well-drained surface where it can receive suitable natural light. Consider how much sun the location receives throughout the day, how exposed it is to wind and how easily you’ll be able to access the frame for watering, ventilation and general plant care.