HELP! Mulberry flowers withering, but leaves are green, why??

Hello plant experts!
I'm a garden hobbyist and have a special interest in mulberry plant.
My mulberry has beautiful green leaves, but I noticed recently that the flowering parts are withering and falling to the ground. Is it sick?
I water normally and added bags of fertilizer soil to supplement a balanced nutrition, but the condition didn't seem to improve. Any ideas how to save my mulberry?

mulberry tree:
surviving flower:

withering flower:


typical leaves:


Please advise!!! thank you everyone :)

 

How are your pollinators? Is the issue that you are expecting the flowers to develop into fruits?

 

You're right. There doesn't seem to have much bees or insect activities seen around the mulberry flowers.
I see what you mean. Because there is no pollination, the flowers would then have "no purpose" to live on, which is why they eventually wither. Is this also because the plant tries to redirect energy for growth than towards reproduction?
So would the solution be to artificially cross pollinate the existing flowers and hope that the flowers' ovaries will mature into fruits?

Thanks for your help!

 

Mulberries are often very messy trees. Fruitless cultivars and male cultivars have been developed for purely ornamental purposes. Are you sure you don't have one of those?