Now that the heat is on in our homes, remember that the air quickly gets dry, so our house plants really need to be misted. Spritz them a few times a week, or daily if they seem to be suffering from lack of humidity. Clustering plants and placing them on trays of pebbles to which you regularly add water to just below the bottom of the pots can be helpful as well. If you grow cactus, stop all water during this period because they're naturally adapted to winter drought. Houseplants will not begin growing again until they get more light and don't need fertilizer until early February.