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PlantSnap
Plant Care
River oak
(Casuarina cunninghamiana)
Also Known As
River oak, Australian pine, Cunningham's casuarina
About This Plant
Casuarina cunninghamiana is a fast-growing evergreen tree that can reach up to 35 meters (115 feet) in height. It has a slender habit with drooping branches and needle-like leaves that are 1-2 cm long. The tree produces small, brown, woody fruit cones that are 1-2 cm in diameter.
Plant Care Instructions
Outdoor Size Range
Casuarina cunninghamiana can grow up to 35 meters (115 feet) tall and 10 meters (33 feet) wide.
Light Requirements
Casuarina cunninghamiana prefers full sun but can tolerate light shade.
Humidity Needs
Casuarina cunninghamiana prefers low humidity.
Fertilizing Schedule
Casuarina cunninghamiana does not require regular fertilization.
Pruning Guidelines
The tree does not require regular pruning, but can be pruned to maintain its shape.
Common Pests and Diseases
Casuarina cunninghamiana is generally not affected by pests or diseases.
Indoor Size Range
Not suitable for indoor cultivation.
Watering Schedule
The tree is drought-tolerant once established and does not require regular watering.
Temperature Range
The tree can tolerate a wide range of temperatures, from -7°C (19°F) to 40°C (104°F).
Growing Season
Casuarina cunninghamiana can be grown year-round in tropical and subtropical regions.
Growing Difficulty Level
Casuarina cunninghamiana is a relatively easy tree to grow and maintain.
USDA Hardiness Zones
Casuarina cunninghamiana is hardy in USDA zones 9b to 11.
Did You Know?
Casuarina cunninghamiana is commonly used for erosion control and as a windbreak in coastal areas due to its ability to tolerate salt spray and strong winds.
