13. Azalea
Rhododendron can grow outdoors in warm climates, and create a beautiful indoor plant to weave or keep indoors year-round. Their beautiful flowers reduce stress and improve mood, but those with allergies should pay attention because they create pollen. Rhododendron excels in removing formaldehyde from the air and is a valuable addition to any collection of indoor plants to purify the air, but what makes them stand out is that it is a colorful gentle, beautiful color.
