A tall, blue-flowered eastern U.S. native that gets much less garden play than Lobelia siphilitica, downy lobelia bears its somewhat slighter flowers in relatively open spikes, giving them an airy, casual elegance. Like all lobelias, it self-sows accommodatingly, suiting it for wildflower borders, cottage gardens, and other informal plantings. Bumblebees and hummingbirds will approve of your taste in plants.
Full to part sun; average to damp soil; 3'x1'; midsummer to fall; Zone 4
Propagated from seed; deep 3.5-inch pots