Between the hosts along the entry walkway? Purple Flowering Groundcover -Campanula Portenschlagiana - a plant that grows in less-than-ideal conditions and has long-lasting foliage. Plant care info is on the post - via Northern Shade
Front Yard Sidewalk Garden Ideas: Filling beds with low maintenance, easy-care plants, such as these ornamental grasses, including fountain grass (Pennisetum) and blue oat grass (Helictotrichon) Via BHG
Great garden borders: Colorful border for three seasons Flowers that bloom over a long season and require only modest amounts of water or time. Choose the right plants and you can have vibrant borders from spring through fall.