What can I do to allow oranges to ripen on the tree? And when is it a good time to harvest them?

Question

My Orange tree produces very small oranges, and they take months to get to a decent size. I live in Delhi India.
Thanks

Answer 1

Here are two articles that should answer your questions.The first one is how to decide when to pick your oranges:
https://www.gardeningknowhow.com/edible/fruits/oranges/harvesting-oranges.htm

and the second may help you determine why your oranges stay small: https://www.gardeningknowhow.com/edible/fruits/fegen/reasons-for-small-hard-fruit.htm