Hi
I have a row of Pittosporum "Mountain Green" variety that appear to be yellowing in the leaves. I think they need some food but would like your opinion, and on what it is they need. I am in Arrowtown. Last year, in the summer, they yellowed slightly "inside" and down lower in the shrub and all the leaves fell off and we thought it was due to being dry - turns out we were over-watering! So I want to do what is right this time!
Thanks for your help.