The trick to managing a seed collection (particularly if you're a bit of a seed collector as I am) is to do an inventory. Usually, I do a run through of what I have available (and what I've ordered in) in January. I round up my little storage boxes, park myself in a comfortable spot, and commence list making. Usually, I wind up with something that looks like this:
It's helpful to see everything that I have available to me, so then I can come up with a plan for which plants will wind up in which gardens. That involves a different list of sorts:
I won't exactly stick to the location, perhaps, but planning like this really helps me to manage my garden spaces come spring. With a good plan, you really can maximize even the smallest of growing spaces!