Premier Patio Trough Planter 1.8mPressure treated to protect against rot Natural timber finish Can be painted or stained if desired afterward Approximate capacity 166 Litres Assembly Instructions here. The Rowlinson Patio Planter is perfect for growing plants, flowers or herbs, adding beauty and style to your garden. Supplied in its natural timber finish, this planter can be painted or stained to suit the style of your garden. It is also pressure treated to protect against rot,