It is always disappointing when a cherished specimen suddenly looks sickly, and it is so often the more expensive types which succumb first. There is not going to be much pleasure in growing indoor plants unless you learn how to avoid plant troubles.
Specific pests and diseases are not usually to blame; in most cases the cause of illness or death is either too much or too little of one or more of the essential growth factors.
There are scores of possible reasons which can account for the death of an indoor plant. The seven most common fatal factors are: