What are the best pots for Phalaenopsis orchids? Clear plastic pots with large drainage holes or slots are the best for Phalaenopsis orchids, inducing healthier orchid roots. Healthy roots mean a healthy orchid. Other pots had negative factors that weighed down their ranking. Terracota, ceramic pots, and wooden-slatted containers all had negative influences, which in the long run, hindered orchid growth.