What do I do for my Dieffenbachia houseplant it was big when I bought?

I don't have a green thumb for houseplants, so I had to go looking for advice for you, Mary. I hope this video helps and you can save your plant.

https://www.youtube.com/watch?v=fn3chGg7cNo

Use cinnamon for antifungal if plant has it

Hi there, Buy a good book on Indoor plants as it will be a good point of reference now and in the future.............

How long has it been in the same pot? It may need to be transplanted into a larger pot with new soil. A little plant food once a month may help. Keep the soil slightly moist since these are tropical plants.

How often do you water it? You may be overwatering! Repot it, let it dry out and fertilize it. Light is important, so place in a room with a lot of light. This will improve the plant's growth rate. Only water once a week and only if dry. Good Luck. Connie, U of A Master Gardener

When mine gets too big, I cut off all the leaves and without doubt, the stalk which is left in the pot, would sprout more leaves. ..or just make a slit cutting of the stalk below the lowest leaf and put a toothpick to keep the cut from touching each other, wrap some spagnum peat around the cutting, enclosed with a saran wrap and in a few weeks new roots would appear. Repot with the new roots and a new plant emerges. I have been doing this for the past 30 years.

I had a dieffenbachia like yours...had it planted in 1/2 of a barrel. It was in the corner of my living room between two picture windows. It got a lot of light but no direct sun. I was always told sun would burn the leaves. Anyway, in a couple of years it had grown almost to the 8 foot ceiling and the leaves were still big and beautiful. I would say that yours probably needs repotting and put in a light but sunless window. I love those plants...do not have one now, however.