i used to buy from bayview gardens( santa cruz, ca), maryott (when they were in san jose, ca), sutton's (when they were in porterville, ca), and nola's san jose, ca., zebra iris gardens (idaho? can't remember now, what state the original farm was located), aitken's salmon creek iris.
but now my net has a wider cast to include: keppel iris, mid america ( ordered tempo two irises), nola's,horton's, mariposa iris , sister's, burgard, & bluej. i've also ordeded from many others that have either sadly gone, or do not sell directly anymore.
i like to purchase from the hybridizers directly. i do tend to order more from gardens that have a website with pictures, and not from paper catalogs. i will not do facebook, so i shy away from vendors who rely solely, on that platform.
my favorites have been keppel, sutton's, nola's, horton's,
aitken's.