Creating a mixed herbaceous border is a fantastic idea for adding color and texture! For continuous blooming, consider layering plants with staggered flowering times. Early bloomers like peonies and irises can start the season, followed by summer favorites such as daylilies and coneflowers. For fall interest, asters and sedums are great choices. Mixing textures with grasses or foliage plants like hostas can add depth. In full sun, lavender, rudbeckia, and salvia work well, while astilbes or ferns can thrive in part shade. Experimenting with various heights and colors will keep your border visually appealing throughout the year.