Q.about fruiting of jackfruit
I am from Karnataka. In my garden I have a jack tree which is nearly 4-5 years old. It gives small fruits before it grow bigger. They are withering, so what’s the reason and what are the preventive methods to get good yield? I am providing plenty of water. Is it due to less sunshine?

This article will help you access the care needed for your Jack Fruit Tree.
https://www.gardeningknowhow.com/edible/fruits/jackfruit-trees/growing-jackfruit-trees.htm