Prairie Moon Nursery and Prairie Nursery are doing well. I believe most of these are from Prairie Nursery which were slightly larger than the plugs I got from Prairie Moon. But they've also had an additional year to establish. Likewise I'm not entirely certain I've planted them in the correct type of soil. A lot of our ephemeral plants do best where the leaf litter has naturally mulched into good soil. Decades of raking out the gardens probably isn't doing them any favors. (I've also planted ~80 Trilliums this year, so we'll see how those do.)
My goal with this plant is to finally get some plants that produce viable seed so I can see what ants like dispersing the seeds. In past years I've had plants make seed but the ants never bothered with them. I suspect poor pollination had lead to inadequate eliasome production; that is, the packet of ant food on the seed wasn't of a quality to the ants liking. Probably due to poor pollination.