Schefflera arbicola or commonly known as the Hawaiian Umbrella Tree is originally from Taiwan but can grow well in the United States. The Hawaiian Umbrella tree has most hardiness in USDA zones 9a which get down to about 20°F, 9b which get to about 25°F, 10a that reaches 30°F, 10b at 35°F, and 11 which can reach down to 40°F and these USDA zones will be warmer then 70°F.
When planting the Hawaiian Umbrella Tree place in full sunlight too partial shade for best growth can grow up to ten to twelve feet tall and will need about six too eight feet in spacing for best root growth, also the soil pH level’s will change the quality of the tree in growth, the Hawaiian Umbrella tree can grow with a soil pH level of about 5.6 to 6.0 when you test in between these numbers you will have a soil pH that is Acidic but when you test the soil pH and it reads 7.6 or 7.8 your soil pH will be more Alkaline which is ok. The blooming color will be red and the blooming time will accrues around early winter through mid spring.