Azalea (Rhododendron simsii)
Bring this beautiful flowering shrub into your home to combat formaldehyde from sources such as plywood or foam insulation. Because azaleas do best in cool areas around 60 to 65 degrees, they’re a good option for improving indoor air in your basement if you can find a bright spot.
If your house is dry, mist the plant every few days to create a more friendly, humid environment, suggests Flower Shop Network. To help ward off disease, remove any dead leaves or blooms that fall into the soil. Fertilize in late winter and in early summer.