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American blue vervain
Verbena hastata
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American blue vervain is an erect, upright perennial that can reach up to 2–4ft in height. It has pointed, toothed, lance-shaped leaves and is entirely covered in tiny, light-blue flowers. American blue vervain is known for its medicinal properties and has long been used in Native American folk medicine. It is a natural sedative and an effective remedy for colds and headaches. The plant can easily be grown in gardens but prefers full sun and moist, well-drained soil. It can also become weedy or invasive, so keep an eye on it and deadhead spent flowers to ensure the plant remains in check.
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