Eryngium planum, known as Blue Eryngo or Flat Sea Holly, is native to central and southeastern Europe and central Asia.
It is a herbaceous perennial growing to 90 cm high with branched silvery-blue stems, and numerous small blue conical flowerheads surrounded by spiky bracts in summer. It is bush-like in appearance but fits in well in any herbaceous border.
It has a beautiful texture, the flowers are long lasting and survives well in drought conditions. It is also great for cut or dried flower arrangements.
Butterflies, bees, wasps and hoverflies love it.