Non-native Plants

Cooper’s Cyathea

Cyathea cooperi

USDA symbol: CYCO18

perennial tree

Hawaii: non-native, naturalized
Lower 48 states: non-native, naturalized

If you’ve ever dreamed of creating a garden that feels like a scene from Jurassic Park, meet Cooper’s cyathea (Cyathea cooperi) – a stunning tree fern that’s guaranteed to make your neighbors do a double-take. This towering beauty brings an unmistakable prehistoric flair to any landscape, though it comes with ...

Cooper’s Cyathea: The Majestic Tree Fern That Brings Prehistoric Drama to Your Garden

If you’ve ever dreamed of creating a garden that feels like a scene from Jurassic Park, meet Cooper’s cyathea (Cyathea cooperi) – a stunning tree fern that’s guaranteed to make your neighbors do a double-take. This towering beauty brings an unmistakable prehistoric flair to any landscape, though it comes with some considerations worth knowing before you plant.

What Exactly Is Cooper’s Cyathea?

Cooper’s cyathea is a perennial tree fern that can grow into quite the showstopper. Unlike your typical garden ferns that hug the ground, this species develops a proper trunk and can tower 13-16 feet high (sometimes even taller in ideal conditions). Its massive, arching fronds can stretch 6-10 feet long, creating an elegant canopy that screams tropical paradise.

You might also see this plant listed under its synonym Sphaeropteris cooperi, but don’t let the scientific name shuffle confuse you – it’s the same magnificent fern.

Where Does It Come From?

Originally from Australia (specifically Queensland and New South Wales), Cooper’s cyathea has made itself at home in several U.S. states. You’ll find established populations in California, Florida, and Hawaii, where it reproduces on its own in the wild.

  • Species observed
  • No observations

Since this fern isn’t native to the United States, it’s worth considering native alternatives that can provide similar dramatic effect while supporting local ecosystems. Look into native tree ferns in your region if available, or consider other native plants that offer bold, architectural presence.

The Garden Appeal Factor

Let’s be honest – Cooper’s cyathea is absolutely stunning. Its graceful, symmetrical crown of fronds creates an instant focal point that transforms any garden into something special. The plant works beautifully as:

  • A dramatic specimen plant in tropical or subtropical gardens
  • A stunning backdrop in shade gardens
  • An architectural element in woodland landscapes
  • A conversation starter that adds vertical interest to your design

Growing Conditions: What This Fern Craves

Cooper’s cyathea isn’t exactly low-maintenance, but the payoff is worth it if you can meet its needs. This fern is happiest in USDA hardiness zones 9b through 11, though it can tolerate brief light frosts with protection.

Here’s what it loves:

  • Light: Partial to full shade (harsh direct sun will scorch those beautiful fronds)
  • Moisture: Consistent water and high humidity – think tropical rainforest vibes
  • Soil: Well-draining but moisture-retentive soil rich in organic matter
  • Protection: Shelter from strong winds that can damage the large fronds

Planting and Care Tips

Ready to give this prehistoric beauty a try? Here’s how to set it up for success:

  • Location, location, location: Choose a spot with morning sun and afternoon shade, protected from harsh winds
  • Soil prep: Amend your soil with plenty of compost or organic matter to improve both drainage and water retention
  • Watering: Keep soil consistently moist but not waterlogged – think damp sponge rather than swimming pool
  • Mulching: Apply a thick layer of organic mulch to help retain moisture and regulate soil temperature
  • Winter care: In cooler zones, provide frost protection with burlap or frost cloth during cold snaps

Wildlife and Pollinator Considerations

As a fern, Cooper’s cyathea doesn’t produce flowers, so it won’t directly attract pollinators like bees and butterflies. However, its large fronds can provide shelter for various small creatures and birds, adding some wildlife value to your garden ecosystem.

The Bottom Line

Cooper’s cyathea is undeniably gorgeous and can create an incredible tropical atmosphere in the right garden. However, since it’s not native to the U.S., consider whether native alternatives might better serve both your landscape goals and local wildlife. If you do choose to grow it, make sure you can provide the consistent moisture and protection it needs to thrive.

Remember, gardening is about creating spaces that bring you joy while being mindful of the broader ecosystem. Whatever you choose to plant, make sure it’s something you’ll love tending for years to come!

Cyathea cooperi is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Cyathea cooperi is also known as:

Sphaeropteris cooperi | USDA symbol: SPCO18

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Fern
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Division: Pteridophyta - Ferns
Class: Filicopsida
Order: Polypodiales
Family: Cyatheaceae Kaulf. - Tree Fern family
Genus: Cyathea Sm. - treefern

Species: Cyathea cooperi (Hook. ex F. Muell.) Domin - Cooper's cyathea

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA