Best in dappled sunlight and well-drained soil that does not dry out entirely in summer. It’s hard to tell top from bottom on eranthis tubers, but it doesn’t matter which end is up: The tubers know to send shoots up and roots down. To speed planting, you can put several tubers in a single planting hole. If left undisturbed, eranthis may seed itself about, eventually forming a yellow carpet in early spring.