Outsidepride Cardoon Cynara Cardunculus Plant Seed - 200 Seeds Cardoon (Cynara Cardunculus) grows as a tender perennial in USDA Zones: 6 - 9 and thrives in any well-drained full sun area. Cardoon, also called Artichoke Thistle reaches 60 inches in height and has violet to blue flower blooms in late summer to mid fall. This sun loving plant is used both as a medicinal and culinary herb and is the perfect addition to any herb garden. Sow these heirloom seeds at 3 seeds per plant and keep moist until germinatino occurs in 14 - 21 days. Our seeds are always Non-GMO and packaged for the current year.