Solanum umbelliferum “Spring Frost” is a very pretty white-flowered cultivar of the Blue Witch Nightshade. But don’t ask for any at the nursery, we’re out. And we don’t get it in very often anyway. But you never know if you come by often then one day, maybe, there it will be. Yay!
If you do have it, go ahead and prune it back in the late fall so it comes out pretty in the spring, and then prune it before summer again to get it to rebloom all summer long.