How can I hang a garland without putting holes in my trimming?

Try better quality command hooks. Or you can tap a sewing pin into the wall. They are pretty strong and the hole is tiny.

I hang garland on my fireplace with scotch tape, it comes right off when the season is over. Just hide the tape under something on the mantel.

Hello i often use-a clear push pin or decorative bulletin board pin to mount my garlands on my window trim or wooden mantle. Its make. A very small hole.

Where exactly do you want to hang the garland - indoors, outdoors?

What type of surface is it - wood, drywall, brick, metal, etc.

A picture would be helpful.