Australian Redcedar: A Majestic Non-Native Tree for Large Landscapes
If you’re looking for a towering shade tree that makes a real statement in the landscape, Australian redcedar (Toona ciliata) might catch your eye. Also known simply as toon, this impressive deciduous tree brings tropical elegance to gardens—though it comes with some important considerations for conscientious gardeners.
What Exactly Is Australian Redcedar?
Despite its common name, Australian redcedar isn’t actually native to Australia alone, nor is it a true cedar. This perennial tree species originally hails from eastern and southeastern Asia, including China, India, Malaysia, and Australia. It’s a member of the mahogany family and can grow into quite the giant—typically reaching heights greater than 13-16 feet, with some specimens growing much taller under the right conditions.
Where You’ll Find It Growing
In the United States, Australian redcedar has established itself in Hawaii, Maryland, and Puerto Rico. It’s considered a non-native species that reproduces on its own in the wild across these areas, meaning it doesn’t need human help to spread and persist in the landscape.
The Good, The Bad, and The Beautiful
Let’s be honest about what you’re getting into with this tree. On the aesthetic side, Australian redcedar is genuinely striking. It produces clusters of fragrant white to pinkish flowers that smell absolutely lovely and attract pollinators like bees. The compound leaves create dappled shade that’s perfect for hot climates, and the tree’s impressive size makes it an excellent specimen or shade tree for large properties.
However, there’s a catch—and it’s a big one. As a non-native species that readily reproduces in the wild, Australian redcedar raises some ecological concerns. While it’s not currently listed as invasive, its ability to establish and persist without human intervention means it could potentially compete with native plants.
Growing Conditions and Care
If you do decide to grow Australian redcedar, here’s what it needs to thrive:
- Climate: USDA hardiness zones 9-11 (tropical and subtropical areas)
- Space: Lots of it—this tree gets big and needs room to spread
- Sunlight: Full sun to partial shade
- Soil: Well-draining soil with regular moisture, especially when young
- Maintenance: Minimal pruning needed once established
Is This Tree Right for Your Garden?
Australian redcedar works best in large landscapes where its size won’t overwhelm the space. Think parks, large residential properties, or commercial landscapes in warm climates. It’s not suitable for small gardens or areas where you want to maintain a native plant focus.
Consider Native Alternatives
Before planting Australian redcedar, consider exploring native shade trees that provide similar benefits without the ecological concerns. Depending on your location, native options might include live oaks, bald cypress, or regional native maples that support local wildlife and ecosystems more effectively.
The Bottom Line
Australian redcedar is undeniably beautiful and functional as a shade tree, but its non-native status means it won’t contribute to local ecosystem health the way native alternatives would. If you choose to plant it, do so responsibly—consider it for appropriate large-scale settings and always explore native options first. Remember, the best gardens work with nature, not against it.
