These classic steel containers are handcrafted in Europe and are among the finest metal containers available in the marketplace today.  To prevent rusting, every piece is fire galvanized by dipping it into a hot zinc bath. These containers will weather naturally to create a beautiful antique zinc patina. Planter boxes are not designed for direct planting and are intended to be used with an interior grow pot or liner.  Cleaning Instructions We recommend cleaning planters and fountains with mild soapy water using a clean sponge or lint free cloth or if needed, a soft bristled brush. If a planter is scratched and the protecting zinc layer is damaged, cold galvanizing paint or paste (containing actual zinc) should be applied to the damaged area to prevent rust. Should rusting have already occurred, remove rust with fine sandpaper or steel wool and clean before applying the cold galvanizing paint or paste..