Daylilies are one of the most popular perennials because they grow with so little fuss. A mature daylily will have enough buds to bloom for weeks. The repeat blooming varieties, such as 'Happy Returns', will bloom for weeks, rest and bloom again. For continuous color you can choose either repeat bloomers or simply plant a few different varieties that bloom at alternate times.
Hemerocallis (Daylily)'Hyperion' (USDA Zones 4 - 9, 40" x 24", Yellow Blooms: Mid-Summer)
- Hemerocallis (Daylily) 'Happy Return' (USDA Zones 4 - 9, 18" x 18", Yellow Repeat Bloomer)
- Hemerocallis (Daylily) 'Going Bananas' (USDA Zones 4 - 9, 18" x 20", Yellow Repeat Bloomer)