Sem Planter || Riviera BlueSem Planter in Riviera Blue by Campania International Add the Sem Planter in Riviera Blue is a colorful set of planters that will bring interest to your garden, entryway, or patio. The Sem Planter in Riviera Blue is sold as a set of 4. Sets cannot be separated. Campania International's glazed and terra cotta planters are handcrafted from Natural clay using traditional techniques. Fired at temperatures of 990 to 1000 degrees Celsius, they ensure frost