According to a study in HortScience journal, Hemigraphis alternata, the purple waffle plant, is very efficient in removing volatile organic compounds (VOCs) like benzene, toluene, and octane. These common indoor pollutants come from everyday household items like paint, cleaners, hair spray, and even dry-cleaned clothes.
Purple waffle plant has deeply puckered foliage, which gives it an extra-large leaf surface area to do its air cleaning job. The reverse sides of the leaves on this low-growing plant are purple, which contrast handsomely with the deep green leaves. Keep waffle plants moist, and give it bright light to maintain the vibrant purple color.