Houseplants
What Exactly Is an Epiphyte? (And What It Is Not)
An epiphyte is a plant that grows on the surface of another plant—usually a tree trunk or branch—using it purely for physical support. The host tree, called a phorophyte, is not a food source. Epiphytes do not tap into the tree's tissues or take nutrients from it; they are not parasites. Instead, they absorb water and minerals from the air, rain, and the thin layer of debris that collects around their roots.
The word itself comes from Greek: epi meaning “on” and phyton meaning “plant.” So an epiphyte is literally “a plant on a plant.” This growth strategy allows them to rise above the crowded forest floor, where sunlight is scarce, and establish themselves in the canopy where light is more abundant.
Epiphytes are remarkably common: botanists estimate that about 10% of all flora on Earth are epiphytes, with more than thirty thousand species of epiphytic organisms. Among these, 89% of terrestrial epiphyte species—around 24,000—are flowering plants.
Where Do Epiphytes Grow in the Wild?
In nature, epiphytes are most diverse in dense tropical and subtropical forests. Here, the canopy is a mosaic of branches and trunks, each one a potential home for these air-loving plants. Macroepiphytes—larger species like many orchids and bromeliads—are especially concentrated in wet tropical forests, where rainfall and humidity are high year-round. Microepiphytes, such as mosses and lichens, are more widespread and can be found in humid zones of nearly all biomes, from temperate woodlands to cloud forests.
This natural context explains why indoor epiphytes are so demanding when it comes to humidity. In their native habitats, they are constantly bathed in moist air, and replicating that environment is the key to helping them thrive in your home.
Epiphytes in Pictures: A Photo Gallery of Common Houseplant Species
The photos in this gallery highlight the unique structures that make epiphytes so fascinating—and so different from the typical houseplants you might already own. Each image focuses on a specific adaptation, from exposed roots to water-holding leaves, so you know exactly what to look for when you bring one home.
Orchids like this Phalaenopsis are classic epiphytes. Notice the thick, fleshy roots that cling to bark—they are designed to absorb moisture from the air, not from soil. In the wild, these roots would wrap around a tree branch, using it purely for support.Bromeliads such as Guzmania naturally grow on tree branches in tropical forests. The overlapping leaves form a tight funnel at the center, a built-in reservoir that catches and stores rainwater. This adaptation is a key reason they thrive in the canopy, where water drains away quickly.Vriesea, another bromeliad, shares the same water-holding funnel strategy. The smooth, arching leaves channel every drop of rain toward the plant's core. When you look at this photo, you are seeing a living storage tank—a perfect solution for surviving periods without rainfall.The Christmas cactus is a lesser-known epiphyte that makes a surprisingly easy houseplant. As an epiphyte, it thrives in high humidity and bright, indirect light. Its flat, segmented stems are actually modified branches that help it cling to tree forks in its native habitat.Dendrobium orchids are another popular epiphyte for beginners. Their swollen, cane-like stems, called pseudobulbs, store water and nutrients for lean times. In this photo, you can see how the plant is potted in a bark-based mix rather than soil—a direct nod to its tree-dwelling origins.Zygopetalum orchids display the porous root system typical of many epiphytes. These roots are adapted to absorb moisture quickly from the air—in fact, they can increase in volume by 11% in a single day when exposed to humidity. This photo shows why these plants need excellent air circulation and a super-porous substrate if potted.Types of Epiphytes: From Orchids to Mosses
Epiphytes are not a single plant family but a diverse group that spans many genera and species. The most familiar groups include mosses, all types of orchids, bromeliads, and lichens. Among flowering plants, epiphytes are especially numerous in the Orchidaceae (orchid), Bromeliaceae (bromeliad), Cactaceae (cactus), and Gesneriaceae (African violet family) families, as well as among ferns and aroids (Araceae).
For houseplant enthusiasts, some of the most popular epiphytes are orchids, bilbergia, bromelia, vriesea, zygopetalum, guzmania, Christmas cactus, and dendrobium. Each of these has adapted to life in the treetops in its own way, but all share a common need for excellent air circulation and high humidity.
How Epiphytes Survive: Roots, Leaves, and Seeds
Epiphytes have evolved remarkable adaptations that allow them to thrive without soil. Their roots are perhaps the most striking feature. Most epiphytes have a porous root system that can absorb moisture directly from the air. In fact, when exposed to a humid environment, these roots can increase in volume by 11% in a single day. This rapid uptake is essential for plants that may go for days without rain.
Leaves are equally specialized. Many epiphytes have large, fleshy leaves that store water, while others form funnels or rosettes that trap rainwater and falling debris. Bromeliads, for example, create a central cup that holds water for extended periods, providing a miniature reservoir in the canopy.
Seed dispersal is another area where epiphytes excel. Their seeds are small and very light, allowing them to be carried by wind over long distances. Some can rise up to 60 meters, hitching a ride on air currents until they land on a suitable branch.
Why Grow on a Tree? The Benefits of an Epiphytic Lifestyle
Growing above the forest floor offers epiphytes two major advantages. First, it gives them access to sunlight, which is often scarce in dense tropical forests where the canopy blocks most light from reaching the ground. By establishing themselves high on branches, epiphytes rise above the lower plant layers and capture the light they need for photosynthesis.
Second, this elevated position provides relative protection from ground-dwelling herbivores. While no plant is entirely safe from hungry animals, the canopy is a less accessible buffet than the forest floor.
Epiphytes also play a crucial ecological role. They contribute to the biomass of their ecosystems and participate in nutrient cycling by capturing falling debris and absorbing moisture. For many animals, including frogs and arthropods, epiphytic plants are a vital habitat component, offering shelter and breeding sites in the treetops.
Epiphyte Care Indoors: Humidity, Light, and Temperature
Caring for epiphytes indoors is not difficult once you understand their basic needs. The most critical factor is humidity. Indoor epiphytes require high air humidity of 60–75%. In many homes, especially during winter when heating dries the air, this can be a challenge. Using a humidifier or placing a pebble tray with water beneath the pot can help maintain the necessary moisture levels.
Light is the second key requirement. Epiphytes need moderate lighting for 10–14 hours per day. A bright windowsill with indirect light is often sufficient, but in darker rooms, grow lights can supplement natural light.
Temperature is also important. During active growth, keep your epiphytes in a range of 20–22°C (68–72°F). During the rest period, do not let the temperature drop below 15°C (59°F). This mimics the seasonal variations they would experience in their native habitats.
When it comes to potting, avoid regular potting soil. Epiphytes need a super-porous substrate that allows air to reach their roots. The key is to ensure excellent drainage and air circulation around the roots.
Common Mistakes to Avoid with Epiphytes
Even with the best intentions, it is easy to make mistakes when caring for epiphytes. The most common error is treating them like regular soil plants. Epiphytes do not tolerate heavy, waterlogged soil. Instead, they need a super-porous substrate that allows air to reach their roots. If you are potting a fern like Phlebodium, for example, use a mix that drains quickly and never let it sit in stagnant moisture.
Another frequent issue is ignoring humidity. In many homes, especially during winter, indoor air becomes dry. If you notice brown leaf tips or wilting, it is often a sign that the air is too dry. Grouping plants together, using a humidifier, or placing a pebble tray with water beneath the pot can help raise humidity levels.
Light is another common pitfall. If your plant is not getting enough light, it may become leggy or fail to bloom. On the other hand, too much direct sunlight can scorch the leaves. A bright windowsill with filtered light is often ideal.
Finally, be mindful of temperature. Sudden temperature swings can stress the plant and make it more susceptible to disease.