I just made a hugel bed at the cabin last weekend. I got logs that were falling apart and had some growth on them that Dave would be tempted to eat! The bed is on top of an old big elm tree stump with a few roots as thick as my calves. MIxed in are wood chips that were ground up from a stump. I added 5 bags of top soil, and five bags of compost. I topped all that with mulch from trees that were cleared on the property. The boards around it are from a shed that we took down. On one side there is an arced rock border from the lake shore. I love that the only thing not from the property is the compost and bags of topsoil! It is for my mom. We she will make a sign that says, "Nana's Potager" painted on weathered 50 year old barn wood from the shed we took down.