The basal foliage of the Italian eryngo is evergreen in milder climates and looks rather like leathery thistle leaves. In summer, the well branched stems carry small egg-shaped flower heads ...

Artichokes are only hardy in Zones 8 and warmer, so they're treated like annuals in colder regions. This means you should ...

but not as strongly as in variegated thistle (Silybum marianum). Each flower head is up to 2 cm long and about 1.5 cm wide, and there are usually clusters of these heads at the ends of each stem, with ...