Spring ephemerals emerge and bloom right after the snow melts, when the spring sun warms the ground through the yet bare trees. After they have finished blooming, the foliage of emphemerals dies back completely, and the plants are dormant until the next spring. Ephemerals can be planted in early fall while the soil is still warm, or early in the spring. An early spring installation gives the plants some time to develop before summer dormancy, but they rarely produce flowers during that first season. An early fall planting allows time for the roots to establish before winter sets in, giving the plants a strong start the following spring.