Air Plants and Epiphytes: How to Grow Plants Without Soil
We’re a soil company, so it may seem a little strange for us to tell you about plants that don't need soil at all. But that's exactly what makes them so fascinating! Air plants have evolved a completely different way of getting the water and nutrients they need, and they're a great introduction to the unusual world of epiphytic plants.
If you've ever been curious about growing epiphytes, rest assured tillandsias are an easy plant to master. And if you find yourself hooked, there's a much larger world of epiphytes to explore, from bromeliads and orchids to the dramatic staghorn fern.
What Are Air Plants and Epiphytes?
Air plants are members of the Tillandsia genus, which is part of the bromeliad family. Most are epiphytes, meaning they grow on another plant or surface for physical support rather than rooting in soil.
For most of the world’s plants, soil normally provides them with several necessities: water, nutrients, oxygen around their roots, and physical support. Epiphytes have evolved other ways to get those same things. In nature, epiphytes often grow on tree trunks and branches, particularly in humid forests. They aren't parasites, i.e., they don't take nutrients from their host plant. Instead, they have adaptations that allow them to collect water and nutrients from rain, humidity, fallen organic matter—even dust!—so they can survive in their environments.
Getting Started with Air Plants
If you're new to growing air plants, Tillandsia is a good place to start. There are hundreds of species with an enormous range of shapes, sizes, and colors. Some form compact rosettes, while others develop long, curling leaves or dramatic silvery foliage.
A few easy air plants for beginners include:
· Tillandsia ionantha: This is small, adaptable, and widely available. Its foliage can develop colorful tones when the plant is preparing to bloom.
· Tillandsia xerographica: A larger, sculptural air plant, its silvery curling leaves make a dramatic display.
· Tillandsia bulbosa: This is an unusual species with a bulbous base and twisting, tubular leaves.
· Tillandsia caput-medusae: This silvery, curling foliage item is the air plant that is easy to recognize and seems to be everywhere.
How to Care for Air Plants
Don't let the name “air plant” fool you. These plants live on more than air alone. Proper care still requires attention to light, water, and airflow.
Air plants are often described as low-maintenance houseplants, but they're not maintenance-free. Once you understand what they need, air plant care is fairly simple.
Give them bright light: Most air plants do best in bright, indirect light. Some species tolerate more direct sun, but a hot, sunny window can dry them out quickly.
Water them regularly: Air plants need water even though they don't grow in soil. Misting can help, but thoroughly soaking or rinsing an air plant is often a better way to hydrate it. After watering, shake off excess moisture and allow the plant to dry completely.
Provide good air circulation: Air movement is particularly important after watering. An air plant that remains wet for too long can rot, so avoid putting a freshly watered plant into an enclosed container or space with no air movement.
There's also a useful clue in an air plant's appearance. Green, smooth-leaved Tillandsia often come from moister environments, while silvery, fuzzy-leaved types are frequently adapted to drier conditions. It's not a hard-and-fast rule, but it can help you understand a little more about what your particular plant may need.
Uplevel with Other Epiphytes
Once you've successfully grown a few air plants, you may want to explore other epiphytic plants. The variety of epiphytes you can “play” with give you ample opportunities to explore different plant forms. It gets really interesting.
Staghorn ferns (Platycerium) are an excellent next step. They look very different from air plants, but they share the same basic epiphytic lifestyle. In nature, staghorn ferns grow attached to trees rather than rooted in the ground.
Staghorn ferns have an especially clever adaptation. Their rounded shield fronds eventually turn brown and help collect fallen leaves and other organic debris around the plant. As that material breaks down, it provides nutrients for the fern.
In a way, the staghorn creates its own little organic matter collection system. It's a fascinating example of how plants can obtain nutrients without relying on the traditional soil-root relationship.
Other epiphytes worth exploring include epiphytic orchids, bromeliads, and Spanish moss. Once you know what to look for, you'll find that plants adapted to life above the soil are surprisingly diverse.
How to Display Air Plants and Epiphytes
No soil or pots needed? Then how do you display air plants and epiphytes? Honestly, not needing a traditional pot lets you get creative with their growing environment.
Air plants can be displayed on pieces of wood, cork, stone, or other plant-safe surfaces. Staghorn ferns are commonly mounted on boards or bark slabs.
Mounting isn't just about creating an attractive display. For an epiphyte, the mounting surface provides physical support while allowing air to circulate around the plant. Choose untreated, plant-safe materials, secure the plant without damaging its growing point, and make sure you can still easily water it.
Think of the goal as creating a miniature version of the plant's natural growing environment—something that provides support without smothering the plant.
What Air Plants Can Teach Us About Healthy Soil
Knowing more about growing plants without soil makes you appreciate soil even more.
Healthy soil provides plants with water, nutrients, oxygen, physical support, and a living community of microorganisms. Epiphytes simply solve those problems differently. Some capture moisture through specialized foliage. Others collect organic debris. Their roots may be adapted for attachment rather than absorbing everything a conventional plant needs from the soil. How epiphytes grow is a great reminder that there's no single way to be a successful plant.
If you've been curious about growing air plants, start with a Tillandsia or two. They're small, interesting, and don't require a garden—or even a bag of potting mix—to get started. And if you find yourself becoming fascinated by plants that live above the soil, don't be surprised if that first air plant eventually leads you to orchids and other epiphytes!
