Need some help keeping my navel orange healthy. The first image shows the (semi-dwarf) navel orange shortly after I planted it in September 2012 (around 8 to 9 months ago from writing this post). The ...
In the images of my citrus below, you can see the leaves are paling towards the edges. What is the deficiency and how can I fix it? The soil is clay-dominated with some sand and coloured red, ...