Lasagna gardening is a layered gardening technique that's great when you have space or soil constraints. It's a form of no-dig garden that gives increased yields with fewer weeds and pests.
Image by Lori L. Stalteri
The idea behind lasagna gardening is to build the bed with alternating layers of high nitrogen and high carbon materials. In this build, you'll use materials like grass clippings, leaves, fruit and vegetable scraps, coffee grounds, manure, compost, trimmings from your garden, and other stuff you probably already have on hand or can get cheaply and easily. Hit up the full post for detailed instructions.
How to Build a Lasagna Bed [Instructables]