Garden edging trim serves many purposes. It keeps the soil of the garden from being washed out onto the lawn or walkway. It keeps grass from creeping into flowerbeds and prevents neighboring flowerbeds from melding in to one another. There are many types of garden edging trim, each with their own aesthetic merits to help complement the overall theme and appearance of your garden.
For a minimalist approach, don't use a visible edge. Plastic stripping comes in rolls. Sink it around the edges of your garden to keep grass from creeping in. Another way to create a decisive edge is to use plants in your garden which form a solid root system. Plant alyssum, artemisia, candytuft, veronica or bouncing bet in a thick wall at the edge of your garden for a colorful look completely free of obvious trim.
Sink materials into the far edge of your garden beds for an orderly appearance like you would find in English, alpine or Renaissance gardens. Use mortared bricks sunken into the rim of the yard to create a clear and wide separation from the garden. Cobblestones work even better if you want to create a full-width walkway around the garden. Add lichens and moss for a natural or aged appearance or use polished limestone blocks for a clean and tidy approach.
Metal edging can be stamped with garden and ivy designs. Stainless steel gives a modern look, while copper--which develops a blue-green verdigris over several months--creates an antique appearance. Natural stones can line the garden bed. Combine this with thick flowering annuals for a solid but unobtrusive barrier. Irregular flagstone and bluestone--stacked in two or three layers along the perimeter--complements English gardens well.