Trachelospermum jasminoides turned yellow
I've had this climber in a large, west facing container for about 3 or 4 years but a couple of years ago it started turning yellow and it's getting worse. What can I do about it? The first couple of years it was really healthy and just when I thought it was getting established it has gone and done this.
I have another one on the other side of the door that is perfectly healthy (one year younger).