Australian Tree Fern
Cyathea cooperi
The Cyathea cooperi, commonly known as the Australian Tree Fern, is an eye-catching architectural plant that brings a prehistoric, tropical feel to any space. It features a slender trunk topped with an expansive canopy of lacy, bright green fronds that can grow several feet long. Give it bright, indirect light, higher humidity, and steady moisture in a planter with drainage holes.
Light
Bright Indirect
Water
High
Difficulty
Moderate
Humidity
High
Pet Friendly
This plant is generally considered non-toxic to cats, dogs, and horses, making it a safe choice for pet owners.
Care Notes
Light
Place your tree fern in a spot with bright, indirect light. While it can tolerate some dappled morning sun, direct afternoon sunlight will scorch the delicate fronds. In low light, growth will slow significantly and fronds may become sparse.
Water
Consistency is key
Keep the soil constantly moist but not waterlogged. In addition to watering the soil, it is beneficial to water the ‘trunk’ (the caudex) as it is composed of aerial roots that appreciate moisture. Never let the root ball dry out completely.
Humidity and Temperature
This plant thrives in high humidity (above 60%). Use a humidifier, pebble tray, or mist the plant daily. If the air is too dry, the tips of the fronds will turn brown and brittle quickly.
Common Issues
- Wilting:
Usually a sign of underwatering or dry air. Check soil moisture immediately.
- Brown Edges:
Likely due to low humidity or salt build-up from tap water.
- Pests:
Watch for scale insects or mealybugs on the undersides of fronds and near the crown.
Soil and Planter
Use a well-draining, peat-rich potting mix with added perlite or bark for aeration and moisture retention. Choose a planter with drainage holes so excess water can escape.
In-Depth Care & Growth
Feeding & Soil
Fertilizer
Balanced liquid organic fertilizer or seaweed extract
Soil
Well-draining, peat-rich potting mix with added perlite or bark for aeration and moisture retention.
Physical Attributes
Mature Size
5-10 feet indoors; up to 30 feet in nature
Growth Rate
Fast
Propagation
Propagated via spores or occasionally by removing offsets from the base of mature specimens.
Common Varieties
Brentwood
Massive, arching fronds of bright emerald green that display an especially delicate, lacy texture and intricate, finely divided patterns.
Robusta
Especially large, deep green, lacy fronds that arch from a stout trunk uniquely patterned with prominent, circular leaf scars known as "coin spots."
Revolvens
Unique downward-curling or recurved leaflets that give the lush green fronds a distinctively textured, architectural appearance.