How to Grow and Care for Australian Tree Fern

Contrary to its name, theAustralian tree fern(Cyathea cooperi) is actually more tree than fern.

It’s best planted in the early spring and prefers warm temperatures and partial shade year-round.

Some species ofCyatheaare the tallest tree ferns.

Australian tree fern with lacy and feathery fronds planted in black pot from above

The Spruce / Anastasiia Tretiak

In their 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 andgreenhouses.

It can grow an additional foot or two each year.

Australian tree fern with lacy and feathery-like fronds in white white and tan pot next to gold watering can

The Spruce / Anastasiia Tretiak

If you’re growing this tree in a cooler area in a pot, move it indoors in winter.

Soil

Australian tree ferns can tolerate a variety ofsoilconditions including sand, loam, and clay.

Keep the soil moist at all times.

Australian tree fern lacy and feather-like frond closeup

The Spruce / Anastasiia Tretiak

Australian tree ferns are notdrought-tolerantand need weekly watering.

In extremely dry weather conditions, their need for moisture and humidity is extremely important.

During the growing season, feed your Australian tree fern monthly with a liquid fertilizer.

Australian tree fern with a new frond growing at base of stems closeup

The Spruce / Anastasiia Tretiak

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.

As ferns, Australian tree ferns reproduce naturally through spores.

They do no produce seeds, and you cannot propagate them from cuttings.

Because the tree fern is susceptible to root rot, ensure the container has large drainage holes.

Plastic pots don’t dry out as fast as clay pots, so they are generally more suitable.

Eventually, it will likely outgrow both the pot and the room.

If possible, plant Australian tree ferns near a building to protect them from strong winds.

Do not water the crown of the plant over winter.

In the wild, Australian tree fern is the fastest-growing of the tree ferns.

Australian tree ferns grow best in partial sun or dappled shade.

They shouldn’t be planted in full sun exposure but also shouldn’t be planted in the shade.

Plant them somewhere where they will get some sun but also be protected from the harsh, noon sun.