Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: To make sure the dough doesnt expand out side the flowerpot
Make sure that it doesn't cross the bottom 1/3 of the pot
Use a dough that is not too sticky or overproofed. Bake in a preheated pot with a tight-fitting lid.