Cynara cardunculus, Cardoon

Cardoon
Cynara cardunculus

Hardiness: Zones 7 to 9
Plant type: Tender perennial
Height: 3- 6'
Spread: 2- 3'
Sun: Full sun 
Water: Medium 
Bloom time: July to September
Bloom color: Purple-violet
Soil: Well draining, organically rich soil, benefits from compost amendment.

Notes: This plant can make it through the winter with some extra insulation, ot can be grown as an annual.

More information on this plant here.