Commonly known as blue sea holly or flat sea holly, it is a herbaceous perennial prized for its unique architectural appearance. It forms silvery-blue, upright, and branched stems, topped with small, spiky, egg-shaped blue flower heads surrounded by narrow bracts.

The flowers appear from mid-summer to early autumn, adding striking colour and texture to gardens.

This drought-tolerant plant thrives in full sun and well-drained soil, making it suitable for borders, cottage gardens and rock gardens.

Known for attracting pollinators, including bees and butterflies, which enhances its ecological value. Furthermore, the flowers are excellent as cut and dried flowers due to their long vase life.