I would like to know what is causing the splotches on the leaves of my citrus (calamondin) tree. They appear as the leaves age (young leaves are unaffected) and are normally a lighter green from their surrounding area. They do not become yellow as seen in the photos of a cutting taken from the plant. Perhaps that points to a nutrient deficiency of some sort. However I have a number of other citrus trees that are being grown in the same medium and environment; likewise the trees are watered and fertilized in the same way. Yet none of the other trees have the affliction. No sign of pests. Any ideas?
