Why are the leaves on my mandarin tree yellow and spotty?
I thought this could be an iron deficiency at first but my tree has yellow spots rather than the yellowing all over as I have seen on pics online. I tried treating the tree with white oil in case there was a pest issue but nothing changed. Any ideas as to what it could be?
The yellow patches may be caused by scale. Often the scale can be found on the underside of the leaf and can be scratched off with a fingernail. Applying PestOil regularly will help. To improve the general health of the mandarin apply fertiliser in spring and autumn. Try Yates Dynamic Lifter Soil Improver & Plant Fertiliser. It's certified organic and will help create a nutrient rich soil for better root growth, stronger plants and more flowers and fruit! It can be used on gardens all year round, including native plants.
Answered: 19 Dec, 2013