Nothing is better at beating the winter blues—dirty air, and lackluster décor—than a flowering houseplant. Florist’s chrysanthemum and Gerbera daisies are the best at removing formaldehyde, with tulips not far behind. Orchids also are very good indoor plants.
Care: Flowering plants require more careful watering and feeding, and most prefer cool temperatures (below 65 degrees). In addition, unless you are a good indoor gardener, you have to toss the plants after the flowers die.