This is my creation of a seedling pot with retractable bottom, to have it easier to get the seedling out of the pot, when it is ready to be planted.

The removable bottom tray has a bunch of holes in it to let excess water through. The outer pot has an opening on each side at the bottom to let excess water out (or to let water in)

The pot is square (54mm) and has a hight of 50mm.

Some additional infos:

• My printing profile is with PLA+ which should meet my requirements of having the culitvation inside. If you want to use the seedling pots outside, you might want to consider using PETG instead
• I can provide two other versions with variants in the hight (60mm and 70mm) - let me know if someone is interested