Australian Tree Fern
Cyathea cooperi
The Cyathea cooperi, commonly known as the Australian Tree Fern, is a stunning 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. Unlike many other ferns, it is relatively fast-growing and creates a dramatic focal point with its elegant, arching foliage. Its trunk is distinctively marked with coin-shaped scars left by fallen fronds, giving it a unique texture and appearance.
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 Guide
Care Guide for Cyathea cooperi
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.
Watering
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
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.
Temperature
Maintain temperatures between 65°F and 80°F (18°C - 27°C). Protect it from cold drafts and temperatures below 50°F (10°C), as it is not frost-tolerant in a container environment.
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.
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.