south dakota, perennial flowers, perennial plants
Herbaceous perennial plants come in a wide array of colors, textures, shapes, and sizes. There are literally thousands of different perennial and biennial species and cultivars from which to choose. Consider many factors when selecting perennials for your garden. Perennial gardens should provide a succession of color throughout the season. Some perennials can provide interesting or unique attributes to a planting, not only when they are in bloom; they may display unusual foliage colors and textures or develop engaging fruits and seeds for winter interest. The height and spread on the plants also must be considered. Annuals, biennials, and flowering bulbs may be included in the perennial planting to extend the season of bloom, to fill in empty areas as perennials grow, and add to more interest.
Graper, David, "Selecting Perennial Flowers for South Dakota" (1993). SDSU Extension Extra Archives. 219.