Answer: It sounds as though your ivy might have developed powdery mildew, a fungal disease. This indicates it needs drier air, or better air circulation. Ivy is such a vigorously growing plant that you can cut away the infected leaves and stems (to prevent spread of the disease and also to open the plant up to better air circulation). Place your ivy in a bright, sunny window and water only when the top of the soil gets dry. Hope your ivy regains its health soon!
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