Consider your garden's winter appearance, and whether there are any spots that need spruced up with a bit of cold-weather interest. Evergreen daylilies hold their foliage color through winter, except in very cold climates, and may even produce new leaves in the colder months. On the other side of the spectrum are deciduous daylilies, which die back completely as winter approaches and sprout again in the spring. Semi-evergreen daylilies retain some, but not all, of their foliage through fall and winter. Semi-evergreen and evergreen daylilies may be the perfect choices to add color in sparse areas in your yard over the winter.