I'm currently planning an orchard in my town, but I'm concerned because I've heard that sometimes trees won't grow in an area that is overcrowded with trees, but exactly how many in an area is "too much"?
This is a bird's eye view of the area I'm talking about: planned PWPs are labelled, white squares will be empty and the green squares are going to be where the trees will be. There will be a small path running under the arch and trellis, and another horizontally through the trellis.

This is not an enclosed area - aside from the labelled cliff side, all the other sides are open and the trees are not touching any walls. Will this work, or would this be too many trees in an area for them to all grow properly?
Alternatively, I've thought of replacing some of the trees with bushes instead - would that fix an overcrowding problem, or would they also make trees wilt if there are too many around?
Alternative plans (orange represents bushes) -

I think I'm starting to prefer the latter a little more, actually.
If you read all that, thank you.
Any help is much appreciated.
Edit: Additionally, I'm not sure if the Wisteria Trellis and Flower Arch would be considered too close together for this to even be possible. Is a one space between PWPs enough? I've wondered this for other things too, like putting benches side by side with one space between.
This is a bird's eye view of the area I'm talking about: planned PWPs are labelled, white squares will be empty and the green squares are going to be where the trees will be. There will be a small path running under the arch and trellis, and another horizontally through the trellis.

This is not an enclosed area - aside from the labelled cliff side, all the other sides are open and the trees are not touching any walls. Will this work, or would this be too many trees in an area for them to all grow properly?
Alternatively, I've thought of replacing some of the trees with bushes instead - would that fix an overcrowding problem, or would they also make trees wilt if there are too many around?
Alternative plans (orange represents bushes) -

I think I'm starting to prefer the latter a little more, actually.
If you read all that, thank you.

Edit: Additionally, I'm not sure if the Wisteria Trellis and Flower Arch would be considered too close together for this to even be possible. Is a one space between PWPs enough? I've wondered this for other things too, like putting benches side by side with one space between.
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