Houseplant clinic: why does my kalanchoe have a powdery coating?

Your kalanchoe plant is showing signs of powdery mildew, a fungal disease that can weaken the plant but doesn't kill it outright. To manage this issue, isolate your plant to prevent spread, remove infected leaves carefully, and improve airflow by opening windows or using a fan. Treat with a natural antifungal spray made from baking soda and water mixed with a drop of castile soap, applied weekly until cleared. For persistent infections, consider neem oil or store-bought fungicide. Prevent future issues by keeping plants well-spaced and checking for fungal activity regularly.