New for 2017: now available in gallon-sized pots. Spikes of brilliant true blue flowers on this wetland native attract butterflies and hummingbirds. Provides outstanding color for the border, wet meadow or pond edge. Great companion plant for Lobelia cardinalis (Cardinal Flower). Naturalizes easily in moist soils, but tolerates periods of drought. Michigan native plant. Plant in sun to part shade. Zone 3. Height 36 inches. Also available in quart pots (see separate listing).