Whether your gardening need itches during the winter or not, having plants in the house can add to the overall health of your household. Having one plant for every 100 square feet in your house helps remove indoor pollutants. In addition, plants take up carbon dioxide and give off oxygen as a waste product. Humans, of course, take up oxygen and give off carbon dioxide as a waste product. So, having plants in the house makes for a healthy and equitable exchange for humans and plants.