Terrestrial orchids are a fascinating category of orchids that differ from other types in several ways. They have unique characteristics that allow them to thrive in harsher temperatures and challenging growing conditions. Unlike other orchids, terrestrial orchids do not solely rely on rain and wind for nutrients or the sun for photosynthesis. In fact, some terrestrial orchids don’t even have leaves. Instead, they have underground roots that absorb nutrients from mycorrhizae fungi, nutrient-rich leaf debris, and various mosses that surround them.