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Author Topic: Problems with potted citrus  (Read 165 times)

raggashack

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Problems with potted citrus
« on: September 11, 2017, 01:42:18 PM »
Hi
I have some problems with my potted trees and after reading too much threads about magnesium or manganese deficiency and other problems with citrus iam really not sure anymore whats wrong with them, maybe someone of you could have a short look and tell it within a few seconds....
My problem is that i have yellow dots on my leaves and its affecting 3 of my 5 citrus plants. 2 affected are c.limons and 1 i believe to be a c.limonimedica.

They've got small yellow dots all over the new growth mainly, but its slowly spreading to the older leaves also, could it be lack of micronutrients?
You see it best on the last pic, but when u stand in front of them u can see it more clearly than on most of the pics, iam sorry.

1 c.limon



2 c.limon (this one maybe also a little underwatered. i was careful because i repotted it 1 month ago)




3 believed to be c.limonimedica





They've all been fed with:

16-3-8 NPK only fertilizer
Epsomsalts 1 hand 1x or 2x per month
1x with micronutrients (Cu: 0,50% Zn: 0,41%  Mn: 0,50%  Fe: 1,44%  Mo: 0,06%)

The soil is 50%peat, 25%pine bark, 25%lava mulch
« Last Edit: September 11, 2017, 02:14:10 PM by raggashack »

Susanne42

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Re: Problems with potted citrus
« Reply #1 on: September 11, 2017, 03:05:09 PM »
why so much epsom salt?

Millet

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Re: Problems with potted citrus
« Reply #2 on: September 11, 2017, 09:14:01 PM »
Your tree's leaf symptoms are showing an iron deficiency.  I notice the trace minerals listed in the fertilizer you are using provides a generous level of iron, which under normal conditions should be plenty iron  for the tree's needs.  However, there is an ingredient in your medium's mix  that stands out loud and clear as a problem, and that is the lava rock (scoria).  Four or five years ago I also tried to grow a container citrus tree using lava rock, and my tree looked just like yours.   Lava rock (scoria) gobbles up the iron that the tree could have used, and an iron deficiency results.   I even tried to add additional iron, but always the tree had a deficiency.  In citrus, an iron deficiency shows up on the tree's NEW leaves, but when the deficiency continues to get worse it will then begin to also show in older leaves too.   You will need to replant your tree into a medium without lava rock.  The peat and bark in the medium are good items, however it would be better if you increase the percentage of bark (PINE) and decrease the percentage peat moss.  Instead of lava you could add a coarse sand or another ingredient as a third ingredient that would also have good drainage properties.  The best to you and your tree.
« Last Edit: September 11, 2017, 10:08:25 PM by Millet »

brian

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Re: Problems with potted citrus
« Reply #3 on: September 11, 2017, 09:56:14 PM »
Millet I remember your lava rock experiment.  Good to see the results help someone else with what might have been a mystery

raggashack

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Re: Problems with potted citrus
« Reply #4 on: September 12, 2017, 05:16:01 PM »
Susanne maybe i was a little inexact about the epsomsalts.i dont use
1 handfull per plant, i dissolved it in 6L water and watered my plants with it.

Thanks a lot to you Millet, theres no chance i would have found this out.
I replanted all plants, even the ones not showing the symptoms yet.
Iam happy i asked before the winter starts, i think repotting 1 month later
wouldn't have been so smooth, its getting darker and a little colder everyday.
Now i can only watch and feed them and iam pretty sure they'll do better by now

 

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