Edit this sentence

How's about you leave the tree and its communal root system alone, capiche?

 

Although each tree is unique, he learned they are connected with one root system.

 

Would replacing "one" with "single" make the sentence clearer?

 

'Why don't you make like a tree...'

 

You can't use the third-person plural pronoun with an antecedant of 'tree,' which is what you have in the example.
You have to rewrite it with a plural antecedant or with singular pronoun.
There would be many ways to do that, but choosing the best rewrite is not possible without the context of the story.
All on can really say is that example provided is incorrect. There are many ways to fix it.

 

Trees are terrific!!

 

I think that I shall never see
a sentence lovely as a tree
or a unique tree trio sharing a root

 

Yet each tree individual to boot.

 

Trees are good.

In my fireplace.

 

And get outta here.

 

A tree grows in Brooklyn.

Or maybe it was three unique trees splitting a root.

 

I was going for the 'Boondock Saints' version, but that works as well.