I was asked by my brother to make a pot to fit into a bulbasaur planter I had printed to give to him. I couldn't find a simple plant pot with holes in it anywhere on thingiverse so I designed it in openscad.

I left it as a Customizer enabled object so you can hopefully generate one for your specifications

I also attached one of the stls it could create.

I think this will print fine as long as sideSlope isn't too large

You can choose to not have holes by making nHoles =0

Good luck.