Defining your borders is the key to great looking landscaping. There is nothing that helps you create a great looking landscape more than defining the borders of your garden beds and tree wells. You can use various border materials to define your borders such as stone mow pavers, Vinyl edging, aluminum edging, clean line edging, natural edging, raised or natural stone, concrete curbing. Define your borders with creative curves or straight lines depending on your preference. Not only do defined borders give you a great looking landscape but they also help with maintenance of your yard by helping to keep grass from growing into your garden beds or mulch or decorative stone spilling on to your lawn. If you are on a budget then you could choose to simply edge out a defined border around your tree wells or garden beds. This will need to be done one time per season at a minimum. A more permanent border like edging or mowing pavers will eliminate the need for hand edging giving you a lower maintenance landscape.