In ‘Blue Star’ (24-28in ... the seed heads to drop their seeds which will often sprout. Eryngium bourgatii (Mediterranean sea holly) One of the more widely grown species, with glossy ...

Sea holly grows in a tall ... and water only during periods of extended drought. ‘Blue Glitter’ has blue-gray foliage and a profuse number of frosty steel blue blooms and reaches 3 feet ...