Rain lily plants (Zephyranthes robusta) grace the dappled shade garden bed or container, producing adorable blooms following rain showers. Growing rain lilies is not difficult when the right conditions are available to the plant. Rain lily bulbs produce diminutive blossoms in abundance once they’re settled in the right spot. Also known as the zephyr lily, fairy lily, and rain flower, Zephyranthes plants are reliably hardy in zones 7-11. Gardeners in colder growing zones can still enjoy these plants in containers, where they perform reliably as border fillers. The plants grow from three to eighteen inches tall, and bloom from summer until frost depending on the variety. Rain lilies generally produce three upright petals and three identical sepals, ranging from narrow to broad. The foliage is grassy and bright green, and tends to have a prostrate habit: think of the narrow foliage of grape hyacinth bulbs, which is similar. An individual flower will only last a few days, with the heaviest flush of bloom occurring first. The bulbs may bloom occasionally throughout the rest of the season, especially after a heavy rain.