Eryngium x zabelli 'Neptune's Gold'

Also known as Sea Holly, Eryngiums are generally spiky, rather architectural plants, which stand well even after the season has finished.  'Neptune's Gold' is a tad unusual, in that it is yellow with tinges of blue as the flowers age, but makes an impressive sight.  Growing in almost any soil conditions except very wet, it likes sun or partial shade and will eventually reach between 60 and 90 cm by 45 to 60cm.