4" Oyama (TM) Self-Watering Planter-Terracotta. 2 pieces. NEW. Exceptional planter which has made a recent come-back to the plant world. Works well for African violets & other Gesneriads. Add perlite to bottom of top piece then add light, well-drained soil to fill. Water is added to bottom reservoir as needed. Add your plant & you now have a spectacular plant for your enjoyment or show. Glenda's House of Violets is an Official Retailer of Oyama Pots!