If buds drop and stems shrivel on your Christmas cactus, look for root injury caused by dry soil. Place a newspaper between the windowsill garden and the window at night to keep any chill from injuring houseplants. Be sure to remove or punch holes in decorative foil around holiday plants, or water will collect and cause roots to die. A common complaint in growing indoor rubber plants is yellowing leaves with dead spots on the edges. This is usually caused by overwatering.
Bottom drainage helps remove surplus water.
If the plant has been in the container for a long time, remove the soil ball and loosen bound roots. Remove some of the soil at the top of the ball and transplant into a large pot. Producing seed robs the bulb of energy that should go into next year's growth. Rotate houseplants in dim locations to sunny spots to keep them all in prime condition. Leaf tip burn of spider plants can be caused by a buildup of soluble salts due to improper watering and too much fertilizer.