Q. I am interested in cultivating moss on the sides of some of my stone garden urns to give them a natural, aged look. How do I do this?

A. Since moss thrives in a shady, moist environment, containers should not be located in full sun. Mix the following ingredients (proportions are not important):

• moss already growing in your yard, preferably on a stone surface
• buttermilk
• wine vinegar
• corn oil

Apply directly onto the surface of the urns and keep them in a cool, shady spot for about one month. Apply more until moss begins to grow. There are also many paints available that can lend an “antiqued” look.