This is not strictly a hugelbed but can work in an urban setting. It's my "Hugelplanters" I have iris, bluebells, fuschia, lobelia, petunia in most of them and I planted a few nasturtium seedlings in the central one-it went wild! I found these logs hollowed out in the forest and brought them home. I cut one horizontally in half and tacked wire mesh on the bases of the others and filled them all with
compost. This is their second season and definitely much better now that they are saturated and stabilised. I watered them maybe once a week in the hot past of summer July/Aug but nothing else.