I have sooty mould on my banksia
just on the underside of the leaves
The strange thing is there is plenty of airflow and light
Nothing else in the garden has it either !
So Fu would the milk +water spray work on this little diddy like it does the roses??
I am going to try it out anyway as well as the Yoghurt and I may as well go the whole hog and give the molasses on the lawn a try too