Cold Hardy Plum recommendations?

[Phlogopite]

Nurseries list

Nurseries Here is a list of mail-order fruit nurseries in the US. It is missing a few places with low reputations. Garden Watchdog is a good place to check out a nursery you have not heard of. General Nurseries 39th Parallel Nursery - A small nursery in KS focused on disease resistant & rare varieties. Adams County Nursery - a large commercial fruit nursery in PA selling quality stock Arboreum Company - specializing in unusual heirloom fruits Bay Flora - primarily tropical fruits …

Cummins nursery has a lot of these options