Kathleen, >>>My question is this: is there enough interest in growing this species >>>among PBSers to send the extra seeds to the seed exchange? I'd be surprised if no one wanted to take you up on this. If you haven't already, my suggestion would be to either plant immediately or put in a baggie with damp peat and refrigerate. They can be sent to the SX this way and will germinate a lot better. I've gotten a number of trillium species seed over the years, and the ones that came packaged like this were the ones that germinated. I let my T kurya in pots dry out quite a bit in summer (they're in shade) and they do very well. I don't soak the pots at all in summer but just flash the water wand across them briefly. This goes for T ovatum as well, but I notice T rivale needs a little more moisture year-round than the other two. Robin Hansen SW Oregon Coast