Yellow Spots on Mogra plant and the leaves are curling | Miscellaneous | Hydroponics farming in India

Please help,

There are Yellow Spots on the leaves Mogra plant and the leaves are curling.  It has a withered look.  No new leaves are coming.  I daily water the plant.  The other two rose plants are doing good which are next to the mogra plant and growing and blooming.

I had put dried powdered cow dung 20 days ago and 10 days ago organic compost in circular form on the soil after turning the top soil upside down.

Kindly suggest a solution.