Yellow leaves on a plant does not mean your plant will die. A quick diagnosis and prompt action can easily save your plant from the great garden in the sky. When you first notice that your plant has run into trouble, it's time to act. Don't just leave it thinking it will regain its former glory on its own. The likelihood is it won't, and the chances are it will die. Yellowing leaves can be caused by a number of problems, some of which we have discussed. As long as you treat your plant as soon as you see the signs, there's every chance your plant will survive.