Here is a larger pic.

I think Undulata Mediovariegata

Yes, I agree. Undulata mediovariegata. I just purchased 2 root balls of this and have 2 in my garden already. They are young, only the 2nd year and look exactly like yours.

Jo~

I agree also, however, I have been told on this forum by very knowledgable members, that Undulata Mediovariegata is an obsolete name. The correct name is simply Undulata. It's much easier to remember, too.

I vote for Undualta also. I have had tons of these over the years.