Cynara cardunculus (Cardoon) is a large, spectacular ornamental hardy perennial and quite a talking point when established. Introduced in 1658, it's both a handsome border plant and a tasty vegetable. It's absolutely loved by bees and butterflies when in flower.

Impressively large, spiky, deeply cut silver leaves with stout stems bearing 4" thistle-like purple flowers in summer. The stems can be blanched in summer and eaten. The flowers, and later seed heads, can be cut and used fresh or dried in displays.