Quote:
Originally Posted by Deborah
Thanks everyone. OK, so what is a cold frame? Is it a small greenhouse?
|
A cold frame is a small box, with a glass or plastic lid, in which a gardener starts seedlings.
The box can be constructed of wood, concrete block, or even straw bales placed in a square or rectangular arrangement. The clear lid may be an old window frame, or any framework to fit the surround, and covered with glass or plastic sheeting to allow the sunlight to enter.
If using wood or concrete block, you might want to line the inside walls with Styrofoam insulation board.
Placed facing south, the box is warmed by solar energy, and becomes so warm on mild days that you may have to prop the lid open to ventilate and prevent the interior temp. to exceed 80 - 90*F.
On a cold night, you should cover the cold frame with a heavy blanket or a sheet of insulation board held down by bricks or something.