Osmanthus Birkwoodii-Discoloured leaves
I have had this shrub for about 10 years and it never did particularly well until I put it into a pot about 5 years ago. It had been in various locations in my garden and never thrived. Since being in a pot it went mad. Grew rather vigorously but still never flowered til last year. I thought I had nailed it. I have repotted it, fed it watered it, pruned it as it was becoming rather dense but the leaves are becoming discoloured. Yellow, black and flecked. It is still producing new growth. Should I be concerned. Please advise. No pests listed.