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
Plants have best friends just like people do. Marigolds help tomatoes and roses grow better. Nasturtiums keep bugs away from squash and broccoli. Petunias protect beans from beetles and oregano chases them away from cucumbers. Geraniums keep Japanese beet
[I think this idea is clever, practical yet beautiful]. Quick & easy pallet idea -- beautiful vertical herb garden DIY -- love the paint color choice. It would be so fun to pay with different fonts on the labels, too.