trifoliate orange not growing new foliage or anything

[incubator01]

I could but then I would lose even more space in my greenhouse. Outside the greenhouse is a no go because it rains way too much here, like, flooding rains sometimes that the ground is soaking wet for weeks.
I kept this one in a container in the 50% peat, 50% turface soil mix to keep it under control growth wise as I don't want a hedge or massive plant, its a bundle of 3 seedlings whose roots are permanently entangled into each other in one giant lump (trying to separate them will definitely kill them all)
so I have some more room left for a yuzu and shikuwasa but the rest is reserved for chili peppers, I'd rather not fill my entire greenhouse with citrus, especially not with one that can grow quite hedgy like this one

@Millet any advice from your end? If planting in full soil is really the only solution I will but I'd rather keep it in a container. The lower part of the soil has finally dried out and I was now able to give it a small amount of water with root booster so watering conditions should stabilize. (as a sidenote, this soil mix performs so well my kaffir lime seedling has grown very hard this couple of months and needed transplanting , drainage is excellent)

[Ilya11]

Incubator01,
What we lack in order to help you are the photos of this mysterious poncirus that does not want to grow.

[incubator01]

Incubator01,
What we lack in order to help you are the photos of this mysterious poncirus that does not want to grow.

There you go.

[Millet]

Why is the container only 1/2 full of medium?  The perched water table must occupy most all of the tree's root zone area, educing much of the root's oxygen. 

[incubator01]

Why is the container only 1/2 full of medium?  The perched water table must occupy most all of the tree's root zone area, educing much of the root's oxygen.

Container is definitely full enough, the terracotta pot is the one carrying the poncirus.
It's well filled and the entire root ball is amply covered in medium...

[Millet]

Covering the entire root ball with the medium, has nothing to do with the purchased water table.  Looking at the picture again, it certainly looks like the container is not completely filled. 

[incubator01]

Covering the entire root ball with the medium, has nothing to do with the purchased water table.  Looking at the picture again, it certainly looks like the container is not completely filled.

No, it is not, about 20% is empty. This was done to prevent backlog water at the bottom to stay there too long, yet it helped very little.

[incubator01]

Here are some more angled pictures and a close up of the branches

[Millet]

Every container has a layer of perched water, even containers without an actual bottom.  Roots will not grow in the perched water portion of the container.

[mikkel]

I also have pots that are not filled to the top with soil, but I have never noticed that the roots do not grow through to the bottom. On the contrary, the roots are usually most massive at the bottom.

[poncirsguy]

Perched water tables are a problem in winter when the tree can't use up the water fast enough.  Not a problem in summer.

[Millet]

Have you ever pulled the tree from the container and examined the roots?

[incubator01]

Have you ever pulled the tree from the container and examined the roots?

Not since last year when I flushed out al the clay soil from tintori.
I'm not keen on removing it from it's soil when he's not doing well. I took a cutting of an excess branch so I'll see how that goes. Meanwhile i don't water too much.