High Quality Barberry produces in Iran where you can find Seedless, Red and Edible berberis vulgaris. Check the following information.
Here in this website, you can know more about Iranian barberry.
There are different types of edible barberry in Iran but only two main types using for export from Iran.
If you want to import Zereshk (Persian name of berberis vulgaris), You need to know POFAKI and ANARI types