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How to grow an ohia tree 
Avoid locations with high altitudes. 
Do not plant an ohia tree over 9 , 000 ft (2 , 743 m) in elevation. Ohia trees are not suited for high elevations, and will likely wilt and die if planted too high.
Higher elevations likely have too little oxygen in the atmosphere to sustain an ohia tree, and may not have enough humidity. If you live in an area above 9 , 000 feet (2 , 743 m), consider finding a different species of tree to plant.