10 Best Indoor Plants for Your Health, According to Research

English ivy, or Hedera helix, is a versatile plant that’s been shown to lower levels of carbon dioxide, formaldehyde, and toxins in the air. They can be grown outside or indoors. As a houseplant, the ivy grows well in hanging baskets or pots, and can be trained to grow along a trellis or shape, according to the Clemson University Cooperative Extension. They grow best in direct sunlight and need to be watered thoroughly once the soil dries out.