Can the plant be save?

Hello everyone,
The gardener trim the border tree too deep and now they are dying. Is there a way to save the tree?
tree — Postimages

 

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Thank you, Wendy. Here is the photo.

 

Your tree looks like a goner, there is probably nothing you can do to save it.
Probable cause: too little sunlight.

 

It may be that the trees in your hedge were trimmed back further than they should have been but green leaves persist. That is very important for the long-term revival of your hedge.

There is no reason to think that over-trimming or a lack of sunlight caused that tree to die. If the tree to the left and to the right are still obviously receiving enough sunlight, why should the one in the middle succumb to lack of sunlight? I've got a few such trees in almost full shade that are doing fairly well.

What we see on Vancouver Island the past few years is that individual trees in hedges are dying - mainly from lack of consistent water. I believe that is why your tree has died.
You need to make sure the trees in the hedge are watered regularly and, when they seem to be doing better, give them little fertilizer in the early spring.
(Margot)

 

It is extremely unlikely, that this hedge was so unevenly watered, as the tree on the left is in relatively good shape (green), but the tree in the middle turned brown and lost most of its leaves claimingly because of irregular watering.
The fence on the background has shaded neighboring trees also, and they also lost most of their leaves in the shaded part. I guess, that in case of under watering the shaded part was the most protected zone against the scorching sun and would have been preserved its leaves better than more exposed parts.

 

In our area we often see random dead trees in a hedge.

 

If you have a habit to plant a hedge in the shade of a fence or to build a fence near the hedge, then it is pretty obvious, why you see random dead trees in a hedge so often.
In the current case the dead tree is not so random. It seems from the photo, that most of the light comes from the left. That's why the tree on the left side is the greenest. The tree in the middle was blocked from light by trees from both sides (besides shading from the fence). Hence it's illumination was the worst and its condition was the poorest.