Q.Orange Tree
I germinated an orange pip, which I nurtured into a small tree. I had it in a pot, then about 18 or more years ago, I planted it into the ground and it is now about 9 feet tall. Three years ago it flowered for the first time but no fruit. Last year 1 orange did grow but remained green. This year the tree is almost in full flower and I have high hopes. What is the best way to promote good fruit growth?
Here are a few articles to help you.
https://www.gardeningknowhow.com/edible/fruits/oranges/growing-an-orange-tree.htm
https://www.gardeningknowhow.com/edible/fruits/oranges/no-fruit-on-orange-trees.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm