Artichokes are generally hardy and do well out doors in USDA Zones 8-9. They grow for several years and in addition to being delicious, are pretty ornamentals in the garden. They can be grown successfully in pots in greenhouses in colder climates.
(Cynara scolymus) This selection of artichoke has great ornamental as well as edible appeal. The Mediterranean native grows to 6' tall with large silver-green foliage topped with flavorful, violet streaked, slightly elongated Artichokes! Grown as a perennial in the Pacific Northwest and other regions with mild winters, artichokes like 1/2 day to full sun and well drained soil. Also known as Violetta, it is hardier than 'Green Globe'. The large, woolly leaves are beautiful in the winter garden. By midsummer, large elongated artichokes develop on towering stems.