Air plants, also known as Tillandsia, are a unique type of plant that do not require soil to grow and are easy to care for. They absorb nutrients and moisture through their leaves, making them a great option for those who are new to gardening or have limited space. There are many different types of air plants available, each with their own unique characteristics and appearance. When looking to buy air plants online, it is important to research the specific type of plant you are interested in and choose a reputable seller to ensure you receive a healthy plant. Some popular online retailers for air plants include Air Plant Design Studio, The Sill, and Mountain Crest Gardens.