We don't store all those seeds! For most of us, our breeding program is filled with agonizing choices about which seeds to keep and which seeds to toss. If you stay fairly organized about your breeding and focus on certain plant/flower types at a time, it doesn't get too bad. But if you're breeding willy-nilly and keeping seeds from all 15 plants each time you breed, you'll soon run out of room and stress over what you're going to do about all those seeds. Been there, done that!