How I Finally Got Rid of Fungus Gnats in My Houseplants Here She Grows 11 Toxic Plants Every Cat Owner Should Avoid Birds and Blooms Costa Farms Grower's Choice Dieffenbachia Dumb Cane House plant in 5 Inch(es) Pot 1 Pack one_size M DEF G POT 01 LW What is wrong with my Dieffenbachia? More and more yellow leaves appearing (I've cut some of them off already). I water it once per week. It used to sit on the window