And the Car-den was born.
Step 1: You'll Need
-Weed blocking cloth or mesh if you've got gophers/moles--available at any nursery/some hardware stores
-Soil, plus any amendments your soil needs (compost, pearlite, fertilizer, etc)
-Veggies (seeds or sprouts)
-Bumper stickers, silver spraypaint etc. for pimping your Car bed
-Tools: shovel, rake, trowel, etc.
Car beds are expensive new, but if you can luck into some other strong enclosure, you can do this very cheaply. We have a dream of a backyard full of found-object vegetable beds. Anyone have a cast iron tub they're looking to get rid of? :-)
Since there's no construction of the box, this project can easily get set up in an afternoon.