Never make a planter!
Maybe that is not quite right. What I should have said is – if you want a planter, plan it out, do the drawings, open the clay and do it.
All of us will get to a point half way through a serious project where things are not doing so well. The short cut is to say, oh well I’ll just put some drainage holes in the bottom and put some herbs in it.
I think that if things are bad, instead of the holes maybe drop it on the floor and recycle the remains.
It is better to have some heroic failures. Take ownership of the difficulties and fight it out. You may have a fifty fifty balance of really good pots and really bad pots. That’s not bad odds.
If there are no holes in the bottom it’s art.