water jasmine help

Hello, I’m a beginner in the Bonsai world but I inherited an amazing collection of Bonsais from my mother in law who was a dedicated Bonsai expert for 30+ years. Unfortunately I didn’t have time to learn from her and I want to take really good care of her trees. One of the trees is a beautiful...

I have a water jasmine I have recently recieved as a gift. I know they love full sun and a good watering but my water jasmine is dropping green leaves to the touch and some of the leaves are dried up and crunchy while others are full green and fine..how can I help this tree?