Since the bank is the heart of all true Devon hedges, it’s important that it should be kept in good condition, with restoration as necessary. Banks slump over the years, stone-facing falls apart, and large trees will loosen the soil and tear away chunks if they fall over. See Maintaining and repairing turf and stone-facing and the video How to repair a Devon stone-faced hedge for detailed practical guidance that can be watched below.
Information on how to build new banks can be found in New turf-faced banks and planting, and in Pipelines.