I'm located in Northwest, Louisiana. My pittosporums (I think that's what they are) look terrible! They they get yellow spots, turn fully yellow or brown, then die. I don't think it's a watering issue, but they do receive full sun. Please help. Thanks!
Hi. I am so sorry that you are struggling with your plants.
Have a look at this. It's for Florida, which has a similar climate, and it mentions some of the symptoms that you seeing.
It sounds like you will need to do prevent diseases by spraying in the future. Probably with a fungicide. I perform preventative spraying (once a month) on my neighbor's phlox, which is not disease resistant, as well as roses prone to blackspot.
