Eryngium planum 'Blue Glitter' (Apiaceae)
Flat Sea Holly
'Blue Glitter' is a seed strain developed for the cut flower trade, with many small blooms on tall branching stems. Steely-blue thistle-like flowers stand erect above stocky rosettes in summer. Spiky blooms are especially nice in fresh or dried arrangements. The vertical form of 'Blue Glitter' will pop up through shorter perennials or fill in at mid-border. Settles nicely into lean sharply drained soil and tolerates the summer heat and humidity of the South. Sea Holly has a tap root, so choose a permanent site when you plant it.
Bloom color: blue
Bloom period: early-summer
Container size: Qt.