DIY vegetable storage bins for the cold room are perfect for anyone that gardens and would like to keep some of the harvest over the fall and winter months. These mesh bins can hold all your potatoes, onions and garlic.
They are built to hold the vegetables while allowing air circulation to avoid spoilage. You can make these in a cool corner of a basement or even an unheated spare room of closet. The pictorial is shared by USA Gardening. They built the mesh bins and even show that you can add shelves above the bins for more storage area.
They do stress that to avoid your veggies rotting they should not touch the concrete wall. Also building them a little ways off the floor will allow air to move all around and give you room to sweep any dirt that may fall off the vegetables over the months they will be there. They show potatoes, onions and garlic but I think cabbages and squash could be stored in the cold room too.
I believe for them though that I would make the shelves out of the mesh and lay them on it so that they didn’t touch. Touching would probably allow them to rot much the way the others veggies touching the wall would.