The flat-leaved sea holly, Eryngium planum , is an umbellifer native to Eurasia that has naturally found its place in dry gardens and wildflower meadows. Its upright, rigid stems, topped with steel-blue umbels, give it a slightly wild, almost mineral appearance that contrasts with the softer foliage of neighboring perennials.

In the garden, it thrives in poor, well-drained soils, where it establishes itself without any particular requirements once rooted. Its summer blooms attract numerous pollinating insects, contributing to the vitality of a harmonious garden. It is an ideal companion plant for dry, sunny spots, where its architectural form and long-lasting flower clusters offer a welcome presence throughout the seasons.