0 a glass or plastic box, with a top that can be left open, into which young plants are put for a short time, especially in order to help them grow faster or to protect them from cold weather
I later planted them in a cold frame in peat and practically every one of those walnut trees grew.
In winter keep them in a cold frame, and as dry as possible.
Place the seedlings in a cold frame and let them have plenty of air.
New machines for cold frame and plate bending have been invented and installed.
Some crops suitable for growing in a cold frame include lettuces, parsley, salad onions, spinach, radishes and turnips etc.
Visitors are first greeted by cold frames, raised gardens edged in bricks originally meant to grow bedding plants for transplant.
