My jasmine is looking wilted and the leaves have all gone a lot darker. Could you help me please? The plant is in a clay pot and tied to a pergola. It has been ok and flowering for over a year.
It may have become root bound and is lacking both moisture and nutrition.
Also check for insects or a fungus issue. If you suspect this, treat the plant with Neem Oil.
Neem Oil works as both an insecticide and fungicide.
Here is a link that will help you.