Encouraging moss to grow on new clay pots helps the pots blend in with the greenery of your garden. Moss-covered pots or garden statues look as if they have been in place for years. Yoghurt provides a medium on which your moss can grow. The porous clay of the pots or concrete will absorb the yoghurt. Keep your pots in a cool, shady place, and water the moss regularly to help it thrive.
Pour 1 cup of plain yoghurt into a blender. Add 1 tbsp or 2 of moss you've scraped off an existing pot or even from the ground or a tree. Don't worry if there's a little dirt mixed in. Blend until you have a smooth mixture of moss and yoghurt. Pour the solution into a shallow bowl.
Dip the paintbrush into the yoghurt mixture and brush it onto the surface of the pot, statue, bench or other item. Coat the surface with a thick layer of the yoghurt mixture.
Set the pot in a cool, shady area. Mist daily with water to keep the pot moist. Within a week or two, the pot will take on a greenish cast as moss begins to grow.
You can paint this moss mixture on clay, concrete, statuary and stone to age the material.