Solved Not sea holly!?

I bought 3 of these from eBay as plugs and always believed them to be sea holly! They have grown as slowly to how they are now two years later. The foliage never dies back and they never flowered!

Any ideas what they are?

The leaves are very big, about the 8 inches in length.

 

Hello kriss, yes they look like Eryngium leaves. Possibly Miss Wilmott's Ghost, which is biennial. So you should get 'flowers ' this year