Macadamia flowers dying, not producing nuts

Question

For the last 3 years my macadamia trees flower but the flowers die and do not produce fruits. I have a about 100 different types of fruit trees in our orchard with a lot pollinators (bees, native and European). The two nut trees are about 9 years old. Will enclose phots. We live in the subtropics.

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Answer 1

You should probably do a soil test and consider fertilizing the trees. This article has information on the required pH level of the soil, as well as what the trees need to thrive. I hope this will help.
https://www.gardeningknowhow.com/edible/nut-trees/macadamia/how-to-grow-macadamia-trees.htm