Partial or morning sun. Blue curls is a leafy annual or biennial which grows 1-3 ft. tall. Its purple to lavender-blue, bell-shaped flowers, deeply lobed at the rim, have conspicuously protruding stamens. The flowers are numerous, in slender, coiled clusters which uncurl as the buds develop. Leaves are soft and deeply cut, appearing ragged-looking.
The plant is usually found in large colonies.