No, it isn’t a garden that produces the ingredients for a baked pasta dish. Rather, it’s a type of raised bed that is built in layers, like a lasagna.
The first step in building a lasagna garden is to choose a good location and put down a layer of sheet mulch.
Next, add layers of organic material, such as compost, grass clippings, fallen leaves, or old newspaper. A frame can help to hold the materials together, but isn’t strictly necessary.
A lasagna garden should stand eight to twelve inches above ground level. It needs to be built higher than this, though, because the materials will settle a lot as they break down into soil.
As with a Hugelkultur bed, a new lasagna garden should be watered thoroughly, to help the materials break down and to provide plenty of moisture for the soil. Once the lasagna garden is established, it will hold moisture well and need little additional watering.
Late summer or early fall is a great time to build a lasagna garden. Plenty of yard waste is available for building up the layers. The material will break down over the winter, and will be watered in the spring by rain and snowmelt. Then, it will be ready for planting!
Seeds and seedlings can be planted directly into the lasagna garden. A final layer of mulch – such as straw or wood chips – will help prevent unwanted plants from inviting themselves in.