How can orchids grow on other plants without taking food from them?

Orchids that grow on other plants are known as epiphytes. It is a common misconception that these plants are parasitic; however, they do not take food or nutrients from their host plants. Instead, they use the host plant merely for physical support, allowing them to grow high above the ground to access better sunlight in dense forests.123

Because they do not draw nourishment from the host, these orchids obtain water and nutrients through other means:

• Water: They absorb moisture from rain and water vapor in the air, often using their roots or specialized leaves.1
• Nutrients: They typically absorb minerals and nutrients from organic debris, such as decaying leaves, that collects on the host plant or around their roots.1
• Fungal Symbiosis: Many orchids rely on a mycorrhiza (a type of fungus) that associates with their roots. This fungus helps the plant absorb nutrients and prevents the leaching of essential minerals from the root material.4

By utilizing these methods, epiphytic orchids thrive independently of their host's internal resources.12