They are generally maintained at a certain height and width, and also pruned occasionally to make them more useful to wildlife. They are most prevalent in agricultural areas, particularly in Europe where they were traditionally used as property dividers. Hedgerows encourage natural pest control in the garden by providing homes for birds and beneficial insects, both of which prey upon plant-eating insects. Shrubs provide nesting sites for birds as well as places to find and feast on slugs, snails, and insects.
Hedgerows provide wildlife habitat, like mini-wilderness areas.
As wilderness shrinks, backyards and gardens can take up the slack by providing plantings of native shrubs and trees. A hedgerow is one way to do that without needing a whole lot of space. Hope this is helpful. 2000 California Native Plant Society. All rights reserved.