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farmerphil

cumquat citrus problems

20 years ago

I have 2 small cumquat trees only about 500mm high, and also several other citrus including lime, lemon, orange and mandarin.

One of the cumquats is looking decidely sickly, the other seems ok. They are quite close together, same soil and as far as I can recall have been watered and fertilised identically. One has developed some die back of a few branches, quite a lot of leaf drop, all fruit have dropped off, and yellowing of some of the remaining leaves. There are quite a few green leaves left but I have a feeling it is going downhill. It seems strange that one tree has decided to look far worse than the other.

I have read about iron and magnesium deficiency but why one tree not the other? In any case I did give them some dolomite (with magnesium), some citrus fertiliser and have also used Seasol liquid fertilser. If anything perhaps too much fertiliser?

I have tended to give the tree lots of water since it has looked sick in case it had dried out too much.

All the other citrus are looking very healthy apart from some leaf curl.

Any other suggestions would be appreciated.

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