Globe Thistle is a clump-forming herbaceous perennial with coarse, prickly leaves with 1-2 ball-shaped silvery-lavender-blue or dark blue flowerheads blooming in early to late summer on rigid branching stems 24-48 inches tall. These beautiful ornamentals grow best in full sun to mostly sunny areas and attract bees and butterflies. In the garden, they will tolerate heat and are deer-resistant. They make excellent cut flowers as well as great additions to dried bouquets.