We'll see how this year goes having the swap in September. Our previous swap(s) were in the winter and I knew I wanted to move the swap to the fall, so I'd hoped that September would be a good month, but it's all still a learning process. If the general consensus is that September doesn't allow enough time for seeds to ripen, I may bump the swap back to October or November in future years to see how that works out. When I had decided on the dates for this year, I had a couple of reasons that I didn't want to do October or November, but hopefully in future years I'll be able to work around those and they won't hinder the option of later-season swapping.