No, they are preserved. We use real, sustainably harvested moss, ferns, flowers, and other vegetation which are then preserved. The preservation process involves carefully treating the plants with natural glycerin (a vegetable oil) and non-toxic coloring. This method allows the materials to retain their natural color and texture, ensuring that your Wonder Moss art maintains a consistent and vibrant appearance. This process keeps the moss looking fresh and lifelike without the need for ongoing maintenance or added costs.