Eryngium alpinum (S)
Hardy in Zones 5-8.
Sea Hollies thrive in full sun and average, well-drained soil. They tolerate heat and drought and poor soil, but require excellent drainage, especially in winter. They have deep taproots and resent being disturbed so select a permanent location. Blooms from midsummer to fall. Often self sows and small seedlings can be replanted at any time.
Plant two inches deep and cover with one inch of soil. Space 1.5-2 feet apart.
