This response is a tad late, but that is very nice Hayes. I really like the dusty blue/silvery color of the leaves!!
I have an unknown that blooms early too. It's individual flowers and the shape of the whole inflorescence are similar to your plant. If you don't mind, I'd like to post a picture here. Perhaps you could tell what it is. The pic is from July 7 this year. I ordered it from Stokes as H. spicatum 'White Wings'.

Here is a link that might be useful: