Campanula rotundifolia, the harebell, is a herbaceous perennial flowering plant in the bellflower family Campanulaceae. It has a circumpolar distribution in the Northern Hemisphere, tending in Europe from the north Mediterranean to the arctic.

In Scotland, it is often known as the bluebell. Elsewhere in Britain, bluebell refers to Hyacinthoides non-scripta, and in North America, bluebell refers to Virginia bluebell. Campanula rotundifolia was historically also known by several other names including blawort, hair-bell, lady's thimble, witch's bells, and witch's thimbles.

Campanula rotundifolia is a perennial species of flowering plant, a slender, prostrate to erect herb, spreading by seed and rhizomes. The basal leaves are long-stalked, rounded to heart-shaped, usually slightly toothed. Leaves on the flowering stems are long and narrow and the upper ones are unstemmed. Many flowers are borne on very slender pedicels. The flowers usually have five (occasionally 4, 6 or 7) pale to mid violet-blue petals fused together into a bell shape, about 12-30 mm (15/32-1 3/16 in) long and five long.

The flowering period is long, and varies by location. In the British Isles, harebell flowers from July to November. In Missouri, it flowers from May to August; in Minnesota, from June to October.

Harebells are native to dry, nutrient-poor grassland and heaths. The plant often successfully colonizes cracks in walls or cliff faces and stable dunes.

Type: Hardy perennial

Height: 20"

Location: Sun or part shade

Hardiness zones: 3-8

Seeds per packet: 20