for older irises try & find Superstition. The iris society of Massachusetts will try & have its sale in concord MA. next year. If we can pull it off that will help you. Many of the plants from Mid-America & Winterberry gardens grow well here. We have them at our auction very often. I am saying that because of your location. I wish we were still having meetings, but the virus is stopping them. We have had R.I. members before. Bur try Iris of Society of Mass. website. (ISM)