Okay- these wonderful boxes are not mine- but my dad made them and I am super excited about the idea of a portable salad box.  They sound like they were pretty simple to make with the box being made with 1 x 4 pieces of wood.  The bottom is layered with screen and poultry fencing.  This allows for the water to go through, but enough support for the soil to stay put.

Stay tuned- hopefully I will get some pictures from my dad when he gets some things growing…… Stand by!