No. Any extra water drains out of the bottom reservoir side hole.
This pot will need a 10 qt bag of soil.
NOT 2 Gallons!! The line at the bottom of the pot is approximately where the water line is, actually the bottom lip of the hole at the line. Actual capacity I'm not sure, each size pot would be a little different. I don't have one yet (waiting for them to arrive), but didn't want you to think 2 gallons as the other person had said. You are not filling it to the top of the pot. Are you? lol But then you couldn't with the fill hole at the bottom!