Author says she has never spent more than $8 to build a 4'x4' raised bed or $35 to build a 4'x20' one. They buy two 1x8"cedar boards, which are naturally rot-resistant, & cut in half, so that it is 4-feet long. Then use a 3" length of a 1x1" pine stake, cut into four pieces, to nail the cedar boards to at corners. Each box costs less than $10.
Building a raised bed is wonderful, but if you have gophers or moles they will get right up into the roots of your plants and destroy your garden! This is a great way to keep them out and let and all the worms:)
Lay down a thick layer of CARDBOARD in your raised garden beds to kill the grass. It is perfectly safe to use and will fully decompose, but not before killing any grass below it. They’ll also provide compost and food for worms.
It's easy to eat organic when you have your own garden! The 35"H Square Foot Raised Bed Gardening table keeps rabbits and garden pests away from your vegetables and the height is easy on your back and knees; it's even wheelchair accessible.