Common name: Sea holly
Scientific name: Eryngium planum
Plant type: Herbaceous perennial
Flowering time: July to September
Height: 36-48 in. (90-120 cm)
Description: Sea Holly (Eryngium planum) is a perennial plant in apiaceae family. It growing to 36-48 in. (90-120 cm). The flower from Jul to August, and the seeds ripen from Aug to September. Sea holly flowers in bright, steely blue. The leaves are blue-green, oblong, cordate-based, deeply-toothed.