Q.Do I Need To Fertilize My Mountain Apple Tree?
I live in Hawaii. The tree is flowering.

Certified GKH Gardening Expert
I would be sure to fertilize as often as a soil test deems necessary. This will ensure that your tree remains at an optimum level of health.
Feeding will depend on the fertility of the soil, and your soil should be, relatively, nutrient rich!
https://www.gardeningknowhow.com/ornamental/trees/mountain-apple/mountain-apple-information.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm