Dieffenbachias need plenty of filtered light. The average indoor temperatures are suitable for the plant but do not expose it to extreme heat or extreme cold. Most houses are low in humidity, especially during the winter months, so make sure to provide the necessary humidity to your plant.
The plant is not very demanding in terms of soil but it should drain well. Water only when the soil feels dry to the touch and use plenty of water each time. Remove any excess water from the dish of the pot because, as most indoor plants, the root system is very sensitive and rots easily.
A general houseplant fertilizer used at the recommended rate is sufficient to keep Dieffenbachia happy.
The wide leaves of the dieffenbachia tend to hold dust and this might obstruct their breathing. Clean the leaves often, removing the dust with a wet sponge or cloth and mist them as often as possible. Take care as its leaves are very tender and stems break easily. For this reason you should avoid placing the pot in high traffic areas where people touch the plant while passing by.
We must stress that all parts of the plant contain an enzyme that is extremely poisonous for little children or pets. If any part of the plant is consumed, this enzyme causes swelling of the pharynx and the tongue to a point where it can obstruct airways and lead to death. It is not usually recommended in households with small children or pets.