Hi Teresa.
Glad you found your way here.
Yes there are many people here that do swapping/trading of plants. The best thing to do is if you see something that interests you, send a tree-mail to that person asking if they would be interested in trading plants with you.
You can also start your very own plant list here at ATP. See the link at the top of the page (List). Go there and follow the easy directions and start a list of plants that you have.
You can show them as have, want, trade.
Also as you go through the Plant Database, you will see to the right side of the plant entry a blue button that you can click on and that will had the plant to your list in what ever category you have set up in your List.
Silly me, I just looked. You already have an awesome list of plant.