Hemerocallis or Daylilies are one of the most rewarding perennial plants in the garden.
They are easy to grow and will perform spectacularly when given even modest care.
These links provide excellent information on all you need to know to grow them.
American Daylily Society Daylily FAQ page
Daylily Garden Timetable by Doris Bishop
Planting, Propagating, Hybridizing, & Books from Charlotte's Daylily Diary 2019
Pests and Diseases