I agree with Stefan, fake plants are quite easy to work with.
When we started with garters we did use real plants, but they'll destroy it and we noticed small mite-like creatures. Maybe they were no harm to our garters but from that day on we didn't take any risk and only use fake plants.
Here are some pics how we use them. We put screw rings at the top of our terra's and put the fake plants in it and drape it over the branches. This is really simpel and it looks nice also. And the garters can climp in it. Aspecialy ribbons like to be above the floor.
And like Stefan said I also don't think that garters are very picky in the type of fake plant you want to use.