The leaves on my iris have spots on them that are yellow encircled with brown. Some of the leaves have turned yellow all together. Any idea what the problem is? Coincidentially they are planted behind some Happy Return Daylilies which have the same problem and also had the same problem last yr. I've looked for bugs....nothing. They don't seem to be rotting or anything. These were moved last fall from another bed and are blooming better than ever despite the leaf problem. Thanks for your help. Also is there anything I can do to stop the problem?