I found these greenery bundles on Amazon.  Nothing freshens a booth up faster than adding greenery.
These were some items I already had in my inventory. Every year, I always use these 3" terracotta pots. Sometimes I will paint or whitewash them to give them a bit more interest. I usually stuff moss in each pot, stack them and tie them with jute string. I also had a vintage bottle, a faux bird nest and this adorable set of ceramic, baby ducks.