How to Build a Hugelkultur Bed
A mound garden is customizable, and you can improvise with what you have on hand, but there is a general layout you should adhere to to make sure the big wood pieces break down and are able to supply nutrients to your crops.
The bottom layer is big logs, branches, and pieces of untreated wood. It’s important to make sure you’re not using wood that is poisonous or resistant to decomposition. The next layer is smaller branches and twigs that will break down faster. The third layer is organic matter. This can be compost, leaves, cardboard, straw, and grass clippings. You want to put raw compostable food waste in first, and then layer finished compost on top of that if you have any. Grass clippings break down quickly, so they can be added closer to the top of the pile. Finally, you want to top that off with traditional soil. Some people finish their bed by placing an upside-down piece of turf to help shape the bed into a uniform mound. After that, you’re ready to start planting directly into the soil.