Cynara cardunculus A remarkable plant with huge grey, deeply cut leaves and purple flowers, often seen in public gardens and city plantings. An edible relative of the Artichoke. Over winters in mild climates. Culture: Start indoors in large plugs or pots 6-8 weeks before planting outdoors. Germinates at room temperature. Plant into good garden soil in full sun; amend the soil if using for edible purpose. Tender Perennial | Ht. 150cm/60” | 20-30 sds/gm.