Lobelia siphilitica --Great Blue Cardinal Flower--

Upright, clump-forming perennial with light to dark-blue, tubular flowers on erect stems summer through fall. Great for rain gardens and shady areas with wet or clay soils. Height 2 to 3 feet, spread 1.5 to 2 feet. Sun to full shade. Attracts butterflies & hummingbirds. Deer resistant.