Dieffenbachia prefer locations with bright, indirect light. The varieties with darker leaves require less light, and they should avoid being in direct sunlight as this can burn the leaves.
One of the most common issues with Dieffenbachia is overwatering. They only need to be watered after the top 1-2 inches of soil become dry. If yellow and drooping leaves are an issue, make sure your Dieffenbachia is in a well-draining pot and reduce the frequency of watering.
As tropical plants, Dieffenbachia love high humidity environments. An occasional misting, a nearby pebble tray filled with water, or wiping the leaves down with a wet cloth are all methods to increase humidity.
Dieffenbachia prefer to be in environments that are 60 degrees Fahrenheit or above. If exposed to cool air, the leaves can yellow and curl.
Dieffenbachia need fairly frequent fertilization while growing. Use a standard N-P-K fertilizer every 4-6 weeks during the growing season (March-October).
Dieffenbachia have a slightly toxic sap that will cause the tongue to swell, which is how it earned the common name "Dumb Cane". Keep out of reach of pets and children.
Dieffenbachia often have large, showy leaves. Occasionally dusting the leaves and rotating your plant can help it thrive and grow.