Sea Holly. A perennial with spiny, mid-green leaves, marbled with white veins. Branched stems of cone-shaped, grey- blue flowers surrounded by spiny silvery white bracts. Height 30cm to 50cm, sprea..

Sea Holly. A perennial with spiny, dark green, basal leaves. Branched stems of large, cone-shaped, intense blue flowers surrounded by spiny blue bracts.  Height and spread to around 75cm x 50c..

Sea Holly. A perennial with spiny, dark green, basal leaves. Branched stems  hold cone-shaped blue flowers surrounded by huge intense metallic blue bracts. Spectacular when in flower and good ..