Potted plants need to be fertilized, especially if in the same pot and soil for a long period of time. Many types of fertilizers are available and any may be used according to label directions. Select one which gives the best results for existing growing conditions. Do not fertilize dry plants as the roots may be burned. Water, then fertilize in a day or two. Resting house plants need no fertilizer.
Putting a chimney cover or chimney cap on top of your flue can save you a lot of money in the long run. The covers keep out damaging moisture, which wears away masonry and steel chimneys – not to mention that they keep those birds and other critters out.