There are 250 species of sea holly varieties to choose from, spanning dainty ground-covering breeds and towering statuesque spikes. Often associated with coastal gardening, these showstopping ...

The plant blooms from early summer to early fall with the most profuse number of flowers in mid-summer. With a long tap root (it’s a member of the carrot family!), it’s drought-tolerant and actually ...

Sea holly is a low-maintenance, long-lived flowering perennial. Its dark green leaves produce taller flower stems with striking purple-blue flowers. The flowers look like small glowing thistles and ...

While this plant's spiny leaves might vaguely resemble the thistle you spend hours trying to get rid of, this is a cultivated garden plant that offers bright steel-blue, conelike flowers with silvery ...

Looking for a blue plant to go with your red, white and blue theme for the Fourth of July? Sea holly, Eryngium planum, has blue flowers that are perfect for flower arrangements, either fresh or dried.

What: Eryngium agavifolium, the agave-leaf sea holly, is a distinctive foliage perennial for the Northwest. Since agaves do not like our cold and wet winters, with a little imagination this can serve ...