- Up for sale is Sea holly, Eryngium. 100 seeds. - Sea holly is an unusual flower as it has metallic blue flowers and stems. - It is easy to grow and thrives on neglect and poor soil and are tolerant of drought, winds, salt sprays, sandy soil and will not be bothered by slugs, bugs or deer. - They bloom over a long period, make great cut flowers and dried flowers if they are picked before they fully open. They will bloom in the first year from planting seeds. - Perennial - Zone: 5-10. - Sun: full sun - Water: regular - Soil: well-draining soil. - Height: 1 1/2'-2' tall. - Bloom time: summer - Difficultly: easy