The star-shaped blooms of Zephyranthes candida, also called the zephyr flower or rain lily, open to brighten gardens and rockeries after a rain. Often sold as potted plants, rain lilies can be installed in the ground anytime after they fade indoors in Sunset's Climate Zones 4 through 32. Plant rain lilies from bulbs in the early spring, 2 to 3 inches deep and 3 to 4 inches apart. The plant's grasslike foliage reaches 6 inches to 1 foot tall and produces its pink-tinged, white blooms in the late summer to early fall. It is evergreen in the warmer parts of the growing range, where it makes an easy-care ground cover. Once established, rain lilies require little regular care.