Built with hot glue and greenhouse plastic! Edges are to cover the plastic to make it look cleaner but are not needed structurally. Print the following for a full piece:

Bottom x1, Top x1, Sides x4, Edge Height x4, Edge Base x7, Short Edge x2,

Slot included for self watering base, can print an additional bottom piece, no top, no short edges, and 1 additional base edge (total of 8) if you don't want the slot.

Designed to use with this:

https://www.printables.com/model/437166-seedplanter-starter-cups-and-tray-self-watering