Cold frames are an effective four-season gardening technique. The system is used primarily to grow; spinach, chard, mache (lambs lettuce), claytonia, arugula, and a variety of lettuces which all grow well in a cold frame. It can also be used to grow other vegetables such as scallions, radishes, carrots, and leeks. Cold frames create an isolated warm, humid, controlled environment for plants to grow during the harsher periods of the year. An angled glass top is angled towards the south in order to catch as much sunlight as possible through the day.
Where to put your cold frame 
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You should place your cold frame where it is easily accessible so that you can check it regularly and keep a close eye on your plants. Having said that, the system is fairly low maintenance. Somewhere
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with a clear southern exposure is ideal, as there you will get the most sunlight. In addition to winter growing, cold frames can be used to bring on plants for growing in the kitchen or vegetable garden. So if it is possible to place the cold frame near your vegetable patch, that would also be a good idea.
What to grow in your cold frame
Autumn
Autumn is the time to grow your larger vegetables, such as carrots, leeks, radishes and similar. Autumn will be the warmer of the three cooler seasons. Long days will allow for give greater
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