If not you'll end up moving them, as I recently did. I had short daylilies behind tall perennials such as ferns and helianthus. Some modern daylilies start blooming in June, while others bloom into late August. Fragrance, night-blooming and evergreen foliage are other criteria. These are less significant to most gardeners, but evaluate your requirements and preferences to decide if they're important to you.
Fragrance is rare in daylilies, but there are some fragrant varieties.
For gardeners who specialize in night-blooming gardens, there are daylilies that bloom only at night. Although most daylilies are dormant in winter and their foliage dies in the fall, some are semi-evergreen and evergreen with foliage that stays green. There are numerous daylilies with a variety of characteristics, but they're all easy to care for. Don't let 55,000 varieties confuse you. Use the suggestions above, and you'll get what you want.