Contrary to its name, the Australian tree fern (Cyathea cooperi, also known as Sphaeropteris cooperi) is actually more tree than fern. Typically, when we think of ferns, we envision plants such as the painted ferns (Athyrium niponicum) or autumn ferns (Dryopteris erythrosora) , which achieve a mature height of about 18 to 24 inches.
But, in its native habitat of Australia, a tree fern can grow up to 50 feet tall. This tropical plant is easily too tall for most indoor growing situations except for large conservatories and greenhouses. Still, if your space and environment allow, it can be a beautiful addition to your landscape.
Characterized by lacy, feathery fronds that grow from 10 to 20 feet in length and a hair-like, scale-covered trunk, the fast-growing, evergreen Australian tree fern can bring an exotic touch to any garden. Its best planted in the early spring and prefers warm temperatures and partial shade year-round.
With their lush, tropical foliage and tree-like structure, Australian tree ferns make a striking addition to indoor spaces. While these plants thrive outdoors in warm climates, they can also be grown successfully as houseplants given the right conditions and care.
If you’d like to add the bold architectural presence of an Australian tree fern to your indoor garden follow this complete guide to providing the light, temperature, watering, humidity, and other key requirements these beauties need to flourish inside.
Overview of Australian Tree Ferns
Native to Australia and New Zealand, Australian tree ferns belong to the Cyathea and Dicksonia genus of ferns. The most popular variety for indoor growing is the Australian tree fern (Cyathea cooperi).
In their natural habitat, these impressive plants can grow up to 20 meters tall! Indoors, they typically reach heights of 4-6 feet. Their trunks are covered in dark, fibrous roots, with large, gracefully arching fronds unfurling from the top.
Thanks to their fast growth rate and ability to adapt to indoor environments, Australian tree ferns make a bold living sculpture in any home.
Caring for Australian Tree Ferns Indoors
To successfully grow an Australian tree fern indoors, there are some key care requirements to provide:
Light
Australian tree ferns prefer bright, indirect light indoors. Some morning or late afternoon sun is beneficial. Avoid direct midday sun, which can scorch fronds. An east or west facing window is ideal.
Water
Keep the soil consistently moist but not waterlogged. Water whenever the top inch becomes dry. Mist fronds frequently to boost humidity. Remove any brown fronds promptly.
Temperature
These plants thrive in temperatures between 60-80°F. Avoid drafty areas Use a humidifier in winter when heating systems dry the air
Humidity
High humidity is essential! Maintain levels around 60-80%. Group plants together, use pebble trays, and mist frequently to provide humidity.
Soil
Use a rich, organic potting mix. Incorporate peat moss or orchid bark to improve drainage and aeration.
Fertilizer
Feed monthly during the growing season with a balanced liquid fertilizer diluted to half strength.
Pot
Repot every 2-3 years in spring. Prune roots and choose a pot one size larger. Provide good drainage holes.
Pests
Check frequently for spider mites, scale, and mealybugs. Treat any pests promptly to avoid infestations.
With the proper care in these areas, an Australian tree fern can add lush, vertical drama to any indoor space!
Step-By-Step Guide to Growing Australian Tree Ferns Indoors
Follow these steps to successfully grow vibrant Australian tree ferns as houseplants:
Choose a Healthy Plant
Select a young but established plant with several fronds and a height of 2-3 feet from a reputable nursery. Avoid any plants with signs of pests, disease, or damage.
Prepare the Right Pot
Pick a pot that is wider than it is tall, with ample drainage holes. Use a rich, organic potting mix amended with peat or orchid bark.
Provide Bright, Indirect Light
Situate your Australian tree fern near an east or west facing window where it will receive bright light but avoid several hours of direct sun.
Maintain High Humidity
Group plants together, set up a humidifier nearby, and mist fronds daily to keep humidity around 60-80% for healthy growth.
Water Thoroughly
Water whenever the top inch of soil dries out. Water slowly and deeply until water runs from the drainage holes. Never let soil get bone dry.
Stake for Support
Insert a tall, sturdy stake gently into the soil and loosely attach the fern’s trunk to provide support as it grows taller.
Feed Regularly
Fertilize monthly in spring and summer with a balanced houseplant fertilizer diluted by half. Discontinue feeding in fall and winter.
Monitor Temperature
Keep your Australian tree fern in an area with consistent temperatures between 60-80°F. Move away from drafty areas, A/Cs, or heat vents.
Control Pests Promptly
Inspect frequently and treat any spider mites, scales, or other pests quickly to prevent major infestations from damaging your plant.
Prune Old Fronds
Remove any dead or damaged fronds promptly by cutting them off at the base to maintain the fern’s graceful form.
Repot As Needed
Repot every 2-3 years in the spring in a slightly larger container. Trim back overgrown roots before repotting.
Enjoy Your Indoor Australian Tree Fern!
With the proper care and conditions, it is absolutely possible to grow vibrant Australian tree ferns as striking houseplants. Their lush, tropical look makes a bold statement in any indoor space. Ensure you provide the light, humidity, moisture, and temperatures these beauties need to thrive indoors. Your patience will be rewarded with a stunning living sculpture!
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Light
Although Australian tree ferns are shade-loving plants in general, they can also thrive in partial sun or dappled sun locations where they receive six hours of light a day. Keep in mind that the more direct sunlight the plant receives, the more likely it is that youll need to increase your watering schedule.
Fertilizer
During the growing season, feed your Australian tree fern monthly with a liquid fertilizer. Larger specimens are heavier feeders and might require feeding every other week year-round. For the amount of fertilizer to use, follow the instructions on the fertilizer label.
How to Grow and Care for Australian Tree Fern
FAQ
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