Cardoon Closely related to globe artichokes and once grown as a vegetable, Cynara cardunculus is a majestic, herbaceous perennial with a wonderfully architectural appearance. The huge leaves are a pale silver, jagged and thistle-like, at their best in spring and early summer, becoming greyer, if no less striking, in late summer. From late June, huge artichoke-like buds open into purple thistle-like flowers, honey-scented and very attractive to pollinators. They are valued by flower-arrangers, and the seedheads provide winter interest. A gorgeous structural plant for a sunny border, or at a corner; water in drought to keep the leaves looking their best. Cardoons can also be grown as a vegetable by wrapping the stems (the part which is eaten) in brown paper in late summer to blanch them. The cardoon holds the RHS Award of Garden Merit. Site: ShelteredSoil: Reasonably fertile, well-drained soilPosition: Full sunFlowering period: June to SeptemberHardiness: Fully hardyHeight: 5’ (1.5m) Spread: 4’ (1.2m)