What’s the difference between dormant, evergreen, and semi-evergreen daylilies?

Dormant, evergreen, and semi-evergreen refers to a daylily’s foliage. 

• Dormant daylilies are deciduous. 
• Evergreen daylilies, as the name implies, will retain their foliage through the winter. 
• Semi-evergreen daylilies are in-between the two, with the overwintering of foliage dependent on climate. 

As a general rule, those in warmer climates should stick with evergreen and semi-evergreen daylilies, while those in colder climates should have luck with both dormant and evergreen cultivars.