While this is true to some extent, just like any plant, the better care you provide, the better your daylilies will perform. The following is designed to help you better understand daylilies and their needs.
Daylilies grow best when planted in full sun to partial shade.
In areas that receive less than 6 hours of sun during the day, your daylilies will probably produce fewer and smaller blooms, and the foliage may not be as robust. Here in the deep south, daylilies appreciate having some afternoon shade because of the hot sun. In my yard, I have obtained excellent results by planting in the filtered sunlight under very tall pine trees. Daylilies will grow in a fairly wide PH range but best results will be obtained if your soil is either neutral or slightly acid. Daylilies will grow in most soil types, but like any other plant, they prefer a soil that is neither too hard or too sandy.