Creeping Jacob's Ladder (Polemonium reptans)
Creeping Jacob’s ladder is best grown in moist, humus-rich and well-drained soil in part shade. It tolerates full sun in cool summer climates. Although technically rhizomatous (using underground stems to asexually reproduce), plants do not creep as the common name somewhat erroneously suggests. It does freely self-seeds in optimum growing conditions. If conditions are favorable, this plant will spread out its area within a few years.