From what Robert Piatek told me, he receives parcels from Mid America. And of course Mid America are now the main source for the wonderful Blyths as well as their own fabulous varieties. Robert is also an 'amateur' hybridiser (ie he doesn't have a nursery) so he has an email list of people like me (!) who are keen to obtain his irises. He circulates us once a year or so when he has surplus rhizomes.... Kat Zalewska (who has now moved back to Poland from the UK) is similar.
I was delighted to be able to buy from both Robert and Kat this year - more complicated since Brexit, but by no means impossible, and I didn't need an import permit. So perhaps if you're keen you could try to find out what would be needed to order from Poland to the USA?
