In a pot, orchids grow well in chopped fir tree bark, tree fern fiber, volcanic rock, perlite or charcoal.
Orchids require plenty of soil drainage. While plants that grow in regular soil can usually survive wet conditions on occasion, orchids are used to water dripping off the trees. As a result, they cannot survive soggy soil.
Orchids can't thrive in regular soil, and even a growing medium that includes soil is not as good for them as soilless conditions. Orchids also need fertilizer while they're growing.