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widely-arching spurs
15"-tall sedge generates striking
but still worth growing for its blooms alone
Even though it hasn't yet been graced with a cultivar name
Sterile—no self-seeding
Eryngium alpinum 'Blue Star', Sea Holly Size:1.16 qt widely-arching spursE. 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, and happily grow in hot and dry conditions. Excellent choice for coastal areas. Clumping perennial. Mature Size: 24 36 in T x 18 in W Minimum temperature: 35 F