jasmine bush about 4.5′ tall
It has bloomed beautifully last three years but I noticed recently that all the leaves were covered in a black powder substance. I don't know if it was a mold type, but all decor on my porch had it. This happened over the winter, but never before. I washed off each leaf with water and thought it would be ok but the leaves are dry and dropping. I have been watering it, so I don't think it's that. What can I do to liven it up? I will miss its beautiful blooms this year, hope I can save it, with your help. Thank you much
Your plant is infected with Sooty Mold.
You can treat the plants with Neem Oil.
Here are some articles that will help you.