The iris in my garden were there when I moved into my house. For most of them, I cannot see the rhizome. As I don't know much about iris, I was wondering if I need to replant them this year.
They also have leaf spot. From what I read, it is fungal. Will a baking soda solution (with canola oil and dish soap) help control this? I prefer to use organic controls whenever possible. I have removed any debris around them.
Thanks for the advice. I hadn't grown them before and am really enjoying them so I want to make sure they stay healthy.