lasagna gardening
n.— «
Three garden designs that have caught my attention lately are island beds, raised beds and lasagna gardens.…Lasagna gardening is a nontraditional organic technique that relies on a layering method called “sheet composting.” The name “lasagna” comes from the way garden beds are created using layers—the same way you layer ingredients when making a pan of lasagna. Watering and weeding are reduced through the heavy layers of mulch and by planting crops close together.
» —“Transform your landscape with one of these garden designs” by Ardis Tobison Hutchinson Leader (Minnesota) Oct. 9, 2007. (source: Double-Tongued Dictionary)