In the home, plant diseases are rarely a problem. Too much or too little water are the main problems. Root rot usually results from a soil mix that does not drain quickly or overly frequent watering. As these plants mature, lower leaves naturally drop to reveal attractive, trunk-like stems. If the stems become too long and bare, you can rejuvenate the plant simply by cutting the stems back to about 6 inches tall. The plant will regrow below the cut.
Although they tolerate lower light conditions, it grows best in brighter, indirect light.
Water thoroughly, then let soil dry to the touch to a depth of 2 inches. Dieffenbachias will grow well in most well-drained container soil mixes, however the root system is very sensitive and rots easily.
For optimum plant health, fertilize with an all-purpose houseplant food April through October, following label directions. For all other months, fertilize half as often.
Mainly from Brazil or Colombia, Costa Rica, Puerto Rico and the West Indies