Squeeze out a bit of brown paint and green paint. Use a dry, scrunched up paper towel to dip lightly into the paint and gently pat and smudge it onto the pot. Only do small sections on the pot so you leave a lot of terra cotta showing.
Squeeze out some white paint. Using a dry sponge paintbrush, spread white paint around the pot in horizontal lines. Make sure to use a little paint on the brush and a light hand on the pot. Let this dry for only about 5 minutes.
Spray the pots with water so that they are wet but not saturated. Run the bristle brush around the pots horizontally to blend the paints and to remove some to represent aging. Use a light hand so that you do not take off too much of the paint. In some places where the white paint is too thick, use a circular motion to soften the lines.
Set the pots aside and let them dry completely. TIP: At this point you can spray the pots with a clear matte coat of spray paint to seal them if you like.