How to Prune cardoon?
Cut down flower stems as they emerge in summer if you want to grow it as a foliage plant

cardoon · Cynara cardunculus
Also known as: prickly artichoke; globe artichoke
Grow in a fertile, well-drained soil in full sun; shelter from strong winds. In very cold winters, apply a dry mulch
Cut down flower stems as they emerge in summer if you want to grow it as a foliage plant