What is the main idea of this passage? A. the blooming season of day lilles
B. how to save money on your water bill
C. growing requirements for day lilies OD.
D. perennial flowers called day lilies

Passage:
(1) Day lilies are very popular flowers because they are dependable perennials that are easy to grow. "Perennials" are plants that come back every year without having to plant new seeds each time.
(2) Day lilies like full sun or light shade and require good drainage, meaning they don't like to stand in water. Once established, day lilies need very little water, so they are easy on your water bill.
(3) There are many varieties of day lilies, ranging in color from yellow to orange to red to lavender, but what they all have in common is that their beautiful, showy blooms only last one day. Luckily, each plant produces multiple blooms through the season, so you can enjoy their lovely flowers for many weeks. They generally bloom in July and August.