Eryngium maritimum, the sea holly or seaside eryngo, is a species of Eryngium native to most European coastlines. It resembles a plume thistle with flowers that are metallic blue! Protected from winds this dune plant grows to a height of 20 to 60 cm. Although widespread, it is considered endangered in many areas, such as Germany where its occurrence has been greatly reduced throughout and has become locally extinct in several districts.

Type: Hardy perennial

Hardiness zones: 4-10

Height: 60 cm, 24"

Location: Sun

Seeds per packet: 5

Germination: Sow the seeds on the surface a seed-start mix and water in. Do not bury the seeds as they require light to germinate. Keep lightly moist and do not let the soil dry out. Keep at 20-22 C, 68-72 F. Seeds germinate in 10-30 days.