E. alpinum cultivar ‘Blue Star’ has a saturated metallic blue coloration in the thistle-like flowers with an eye-catching spiny ruff. The flowers are held aloft on stiff stems reaching heights of 2-3 ft. Eryngiums are incredibly hardy, andhappily grow in hot and dry conditions. Excellent choice forcoastal areas.Clumping perennial.

Mature Size:24-36 in T x 18in W

Minimum temperature: -35F