Cultivar (variety) heights range from six inches to more than four feet. With this variation in height, daylilies can be used in both large and small landscape sites. Smaller cultivars can be used as edgers and foreground plants, while the larger daylily cultivars can be used in background plantings, as accents, or in front of tall hardscape elements such as fences and decks. Daylilies also work well in mixed borders and beds. They maintain their flowering, growth and space when planted with more aggressive plants.