On the back we are placing 4 pots. I use the 8" plastic pots and foam them into place. My plants are in other 8" pots so I can slide them in and out as needed. I have tried using smaller pots and was disappointed. By using 8" pots you can grow a nicely sized pothos or spider plant (my 2 go-to plants) or it will hold a dracaena nicely as well. We are also using some of the egg crate as a support as shown in the last photo.