Narrow-leaved Dayflower (Commelina erecta var. deamiana), a Wisconsin Special Concern plant, is found in sand prairies and on sandstone outcrops, mostly along the lower Wisconsin River. Blooming occurs late June through early September; fruiting occurs late August through late September. The optimal identification period for this species is late June through early September.
This species is not very winter hardy, the roots are best dug up in autumn and stored like dahlias in a cool frost free place and then planted out in spring
