Seeds for Porto Spineless Cardoon | Cynara cardunculus | Amkha Seed
Artichokes and its Tough Cousin, the Cardoon - Dallas Arboretum and Botanical Garden Blog
What the Heck Do I Do With a Cardoon? | Arts & Culture| Smithsonian Magazine
Cardoons - Growing, Preparing and Cooking Cardoons | Hank Shaw
The Cardoon: A Bold and Versatile Plant | Our Stories and Perspectives
Swoon over cardoons! Huge and hardy, with their glorious lavender flowers and spectacular seed heads, cardoons are the star turn in any garden says Monty Don | Daily Mail Online