I have had alot of luck with houseplants, but every time I get a Diffenbachia Plant I manage to kill it. In July 2015 I bought a little plant in a 4inch pot, it was beautiful, it slowly began to loose a leaf from the bottom an now has one leaf starting to sprout, I would really love to save this plant. I know it gets good light I am very careful with watering, I use the vitamin you recomended superthriveSuperthrive combines vitamins and hormones to encourage plant growth both above and below the soil line. It's not a plant food so it needs to be used in addition to your regular plant food; the two can be used at the same time. Just put a few drops into your watering can & that's all that's needed to improve the health & appearance of your plants. If your plants are in real trouble, add about 10 drops per 2 gallons of water. SuperThrive works best when the soil is dry. on all my houseplants. Can you please help Judy? Thanks, Susan
Here are a couple of reasons why your dieffenbachia houseplants may be losing leaves.