Mix and match within the overall space. The plantings within each bed here are uniform, but they vary from bed to bed. Design tip: Creating a focal point, such as this fountain set in a semicircle of green, adds needed interest, especially in a large space where the masses of similar beds could be overwhelming. In this space, which is very large, the bed and trees also serve as similar breaks but don't overwhelm the design. In a smaller space, go with just one focal point.