Last year I sowed some bee pod seeds in a seed tray and just left it outside over winter; now we have about a dozen young irises that I hope will bloom next May. As Neal says, they may well turn out to be horrid, but it's fun waiting to see. I may try stratification this time around - did that with some deliberate daylily crosses and it speeded things up and worked well.
Gabe, think about whether you should get a slightly bigger greenhouse - we bought a smallish one and I've regretted it so many times; there's never enough space! Potting up, cuttings, etc., bench, 'tlc' corner, greenhouse tomatoes, all the things that are either too tender to leave out over winter or that grow better with a bit of extra warmth... Just a thought.