After separating the plant grouping in this pack, I decided to try to turn the containers into functional planters and it worked out great! These planters will all fit shrubs and flowers. The only planter that will hold a tree is the large burlap sack, and although you can put mushrooms in any of these the dirt pile is a little larger so it may stick out of the container a little bit. Also, the half-barrel planter has an additional slot for small deco. I shrank and put some little rocks in there but any of my modular plants would work well there too!