Serious problem with citrus

[goldfenix]

Hi good people,

About 3 weeks ago my cytrus started to lose leaves rapidly, to lose their shoots and to dry out their branches.



I saw that there was a mild attack of mealybugs and aphids, which I was able to eliminate with neem oil and potassium soap, but I am afraid they are not getting any better and have continued to lose leaves and the branches have continued to dry out.

I am desperate


A week ago:
























Today:

[goldfenix]

leaf in detail:



It seems nitrogen deficiency but I am using amino acids in the leafs

[Laaz]

The first thing I would do, is replace your soil.

[goldfenix]

Done.
I used coco fibre as a base, I freed the roots, they didn't seem to be rotten or anything similar but they probably needed more space because I noticed that the soil was a bit compacted for the volume of the pot.
I didn't see any symptoms of root asphyxia either.

[Sylvain]

Give it food. it is missing of every thing.

It would be good to elevate the pot on wedges to allow air to circulate under the pot.

[millet]

The soil in your pictures looked very tight,  having very little root zone oxygen.