My Meiwa Kumquat is about 30 inches high and 18 months old. Last year after planting it in a new part of my garden it sulked a little but still stayed green. This year all the new 2 inch growth is chlorotic yellow/white and hasn't developed. Old growth is still green.

I thought of lime induced chlorosis as the whole garden had received a good dose of dolomite this New Zealand spring and got a shock when I checked the PH which I hadn't done before..
The PH wouldn't register on the dial of my measurer where the Meiwa was planted.
4 feet away in every direction the PH was around 6. All other citrus are doing well.
I guess the chlorosis isn't lime induced. I am at a loss what is going on in that soil patch.

I lifted the bush out, washed the roots and replanted it in fresh neutral potting mix that I placed in a large hole dug where the original soil was.
On the advice of my local gardencentre I watered it in with
Sequestrene a chelated iron tonic.
Now I'm wondering if I should have used it..
Any ideas would be appreciated...I'm at a loss with where to go from here...

A picture would help.

[quote="Sylvain"]A picture would help.[/quote]
Someone else has my camera so I can't at the moment.
Never mind I've worked it out myself courtesy of the search function this forum has.
Joe Real has a thread about Monterey Citrus Nurseries treasure trove of information and this has pinned down my problem..

http://www.montereybaynsy.com/C.htm
Kumquats and Primarily Kumquat-like Hybrids -- all are compact and make excellent ornamentals, in containers also. The two true kumquats, 'Nagami' and 'Meiwa,' are prone to zinc deficiency, recognized in all citrus by indistinct, somewhat blotchy veinal chlorosis, and tiny new growth that tends to emerge yellow white with very short internodes ("little leaf"). Best to treat with a complete metal/trace element mixture lest you completely screw up your soil chemistry by applying too much zinc and inducing poisoning or complex some of the other metals. As befits very cold hardy plants, kumquats are highly seasonal growers and won't move under short day conditions because they have the sense not to be producing tender growth when they may suffer freeze damage. rev 1/2007