Anything that was once alive will naturally decompose. However, some organic wastes should not be composted at home. DO compost these items: grass clippings, leaves, plant stalks, hedge trimmings, old potting soil, twigs, annual weeds without seed heads, vegetable scraps, coffee filters, and tea bags. Do NOT compost these items: diseased plants, weeds with seed heads, invasive weeds such a quack grass and moring glory, pet feces, dead animals, bread and grains, meat or fish parts, dairy products, grease, cooking oil, or oily foods.
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.