Australian tree fern (Sphaeropteris cooperi)
Also known as: Giant scaly tree fern
The Australian tree fern is a cold-hardy, tropical evergreen that thrives in shady gardens. Known for its slender trunk and delicate, lace-like fronds, it adds a touch of elegance to any landscape.
In This Article
Attributes of Australian tree fern
Lifespan
Perennial
Plant Type
Tree
Plant Height
4.5 m to 15 m
Spread
3 m to 6 m
Leaf Color
Green
Flower Size
N/A (ferns do not produce flowers)
Flower Color
N/A (ferns do not produce flowers)
Images of Australian tree fern
Quickly Identify Australian tree fern
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Majestic height up to 50 feet (15 meters).
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Fronds ranging from 10 to 20 feet (3 to 6 meters).
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Triangular scars on trunk creating ladder-like pattern.
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Prominent veins running parallel on large leaves.
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Fibrous bark in muted earth tones, appealing tactilely.
Scientific Classification of Australian tree fern
Phylum
Vascular plants
Class
Ferns
Order
Cyatheales
Family
Tree ferns
Genus
Sphaeropteris
Species
Australian tree fern
Planting and Growing of Australian tree fern
Care Difficulty
Hard
Watering Schedule
Every 8 days
Sunlight Requirements
Partial sun
Sunshine Duration
6-12 hours
Ideal Temperature
65-75℉
Soil Type
Potting Mix, Peat Mix
Soil pH
6.5-7.5
Fertilizer Type
Balanced
Pruning Season
Spring, Summer
Pruning Area
Branches, Leaves
Pruning Frequency
2 times a year
Repotting Season
Spring
Pot Type
Plastic, Ceramic
How to Water Australian tree fern?
For Sphaeropteris cooperi, a robust tree fern, it's imperative to aim for consistency in moisture without saturation. Each watering session should deliver around 700 mL, ensuring the root ball stays optimally moist without pooling water at the bottom. This aligns with the species' native rainforest habitat where soil retention is consistent.
What are the symptoms of an underwatered Australian tree fern?
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What should I do if my Australian tree fern is not getting enough water?
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What are the symptoms of an overwatered Australian tree fern?
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How to save an overwatered Australian tree fern?
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What Are the Sunlight Requirements for Australian tree fern?
Partial sun provides a balance, with 4 to 6 hours of gentle, filtered light fostering lush foliage and vigorous growth in Sphaeropteris cooperi.
More About Sunlight Requirements Techniques→
What is the ideal lighting condition for Sphaeropteris cooperi?
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How can you provide ideal lighting for Sphaeropteris cooperi?
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What benefits does Sphaeropteris cooperi gain from ideal lighting?
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What Is the Ideal Temperature Range for Australian tree fern?
The ideal temperature range for Sphaeropteris cooperi is between 65°F and 75°F. This range provides the perfect balance for the plant's metabolic processes, ensuring proper growth, vibrant foliage, and overall health. Outside these conditions, the plant may start showing signs of stress, affecting its growth rate.
What Soil is Best for Australian tree fern?
Sphaeropteris cooperi thrives in a soil that retains moisture well without becoming waterlogged. Loam or sandy loam provides ideal drainage, preventing root rot. Proper moisture retention supports lush foliage growth. Rich in organic matter, loamy soils provide essential nutrients for Sphaeropteris cooperi. The nutrient-dense environment promotes robust growth and vibrant leaf color, enhancing the plant's overall health. Good drainage is crucial to prevent stagnation around the roots. Both loam and sandy loam support adequate water flow, mitigating the risk of fungal diseases and encouraging strong root development.
How to Fertilize Australian tree fern?
Sphaeropteris cooperi, commonly known as the Australian tree fern, requires a balanced nutrient supply to maintain its lush foliage and rapid growth. Typically, a dilution ratio of liquid fertilizer is about 1/4 of the recommended strength when applied bi-monthly, ensuring gentle feeding without risk of root burn.
How to Prune Australian tree fern?
While pruning, it's advisable to wear gloves and protective eyewear. The sap of Sphaeropteris cooperi can be mildly irritating to skin, and the fronds can be quite large and spiky, posing a risk to unprotected skin and eyes. After pruning, collect and dispose of all cut fronds carefully. Leaving them around the base of the plant can attract pests or diseases, so it's best to compost or dispose of them in a green waste bin promptly.
More About Pruning Techniques→
How to Propagate Australian tree fern plant?
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Collect seeds from mature Sphaeropteris cooperi plants in spring. Clean and dry the seeds thoroughly before planting to avoid mold growth.
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Sow the seeds on the surface of a moist, sterile potting mix. Cover the seeds lightly with soil and mist them gently to maintain humidity.
3
Choose a mature plant with multiple healthy fronds. Carefully dig up the plant, and separate it into divisions, ensuring each segment has a portion of the root system.
How to Repot Australian tree fern plant?
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Sphaeropteris cooperi should be repotted when you notice its roots emerging from the pot's drainage holes or if growth becomes stunted. These signs indicate that the plant has outgrown its container and needs more room to expand and thrive.
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Opt for a pot that is 2-3 inches larger in diameter than the current one. A clay or terracotta pot is ideal as it allows for better airflow, reducing the risk of root rot. Ensure the pot has sufficient drainage holes to prevent water accumulation.
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Use a rich, well-draining potting mix, ideally one with added organic matter like compost or peat. This mix will hold enough moisture while allowing excess to drain, ensuring the roots have the air and nutrients they need.
