Mine that are in the sun are almost done blooming now, the ones in part shade are about half done. I am pretty sure that what I have is the cultivar 'Stephanie' rather than the native plant, but you are welcome to the seeds. Close to Lexington and Summit in St. Paul, if that's near you.

Thanks, but I have a source of seeds. I'm not positive that they are the native, which I would prefer, but they are closer than St Paul, if I can time the visit right and only have to go out once. Just trying to get the approx. timing of seed ripening. I don't think this plant releases its seeds within two nanoseconds of ripening, as some plants do, but hangs on to them a little while.