I have a lisbon lemon tree, planted in my garden in almost full sun, that is 13 months old. It is about 1.5 metres high and 1 metre across. Nice and bushy, but the 3 month old growth is yellow with green veins. Some of the older leaves are also looking lighter, and 'dryish' and it has even lost some leaves.
It has started sprouting darker purple growth, but even this is starting to fade nearer the top of the tree.
At the bottom, the leaves are not as bad, but the problem still exists.
I have recently fed it with magnesium salts and iron chelate, but to no avail. I even gave it a second dose after 2 weeks when I noticed no change. Nothing has happened.
This "yellowing" has happened once before, and I added magnesium salts and the problem went away. Not this time though.
I have also ritually fed it every 6 months as required with an all round citrus fertilsier.
The tree is flowering, and I am about to pull these buds off. I guess it is good news that it is flowering, but I am still sad because I have no idea how to fix my poor little tree and make it look healthy again.
I do not know the acidity of my soil.
Any suggestions would be appreciated. :)
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