Trim and Trim

As I opened the curtains this morning I looked down upon Ayala Avenue to see, once again, as every morning, the strands of white stars still clinging to the tree trunks that line the divider in the street.

Holiday remains.

All the rest of the decorations along Ayala Avenue were taken down the week after New Years. The stars in the hedge line remained here until crews came through to trim those two weeks ago.

But the trees remain trimmed.

That got me to thinking (a "Carlin moment", if you will):

Why, when you trim a hedge, are you cutting away parts of it, but when you trim a tree you are adding stuff to it?

There are other ways we use trim, but I'm restricting this thought to how it pertains to plant life.