Certified GKH Gardening Expert
You can plant them together, but I would go with an 8 or 10 inch pot. Those are beauties.
They need well draining potting soil so you can add some sand to help. They like bright, indirect light and high humidity. Let the soil dry out between waterings. They are supposed to be an easy plant and are pet friendly. Fertilize monthly when actively growing but not in winter.