Even during the winter one can grow greens and herbs just by using a cold frame.
Building a cold frame is easy!
The following is a brief explanation on how to build a cold frame and on how to prepare the soil for your winter garden.
Step 1: Initial considerations
First thing to consider before building your cold frame is the location. Ideally it should be south facing to collect the warmth of the sun. Also, consider the wind, (windbreaks), and water,(drainage), elements.