I have 300ish now that are in their first or second year. My land will be a nice test spot for more northern growing. Really, 2 years ago; I had 3 historics, a patch of At First Sight rhizomes from a storage auction, and Blue Moon sibs a tenant planted in blasting south sun.
Let's see who does well in Maine. Black must. I get a lot of his dwarfs at the swap.