To prevent overwintering of iris borers and the fungus, iris leaf spot, remove and clean up dead leaves from iris plants now. Iris borer eggs and iris leaf spot survive in plant debris through the winter and reappear the next growing season. Removing debris from the garden is an effective control against these pests. Healthy iris leaves can be cut back to one-half their size.
Cynthia Domenghini, Extenison Agent
