This clump-forming perennial has upright leafy stems. From late summer to mid-autumn, it bears dense spikes of light to bright blue tubular, two-lipped flowers with a more prominent lower lip.

Noteworthy characteristics: Long-lasting bloom. Suitable for edging, near water, or in a mixed or herbaceous border. U.S. native.

Care: Grow in deep, moist soil. Fertilize every two weeks in spring and early summer to improve flowering. Plants may be trimmed as they die back in hot summers.

Height: 1-3 feet
Width: 6-12 inches
Zone: 4-8
Exposure: Full Sun/Part Shade
Landscape Uses: Beds & Borders, Waterside, Naturalizing
Bloom: Blue