How to build a cold frame for winter gardening (with plans!) your plant-growing season can start long before warm weather hits -- all it takes is a wooden cold frame box with a transparent roof.. Perhaps you will want to make several storage pits with a box of vegetables in each, so you can remove them one at a time without disturbing them all. if so, put a variety of vegetables in each box. for cabbage, a simple method is to dig a trench 8 inches deep and wide enough for three heads.. Its dry and stays chilly in the winter. id like to make it our cold storage area but dont know what the temp should be on the inside consistently and if it would still work as cold storage for fresh produce with my freezers running in there..
