MNN Galleries

15 houseplants for improving indoor air quality

By: Julie Knapp on Jan. 29, 2016, 1:07 p.m.
English ivy

Photo: ume-y/flickr

11 of 17

English ivy (Hedera helix)

A study found that English ivy reduces airborne fecal-matter particles. It has also been shown to filter out formaldehyde found in some household cleaning products.

Although popular as a potted houseplant, the National Park Service doesn't seem to be such a fan. The plant is called "an aggressive invader that threatens all vegetation levels of forested and open areas." Fortunately, ivy shouldn't do much damage in a pot in your home. It grows best with moist soil and four or more hours of direct sunlight each day.