These came to me as "single lavender poppy." It behaves as an annual here (dries up by mid to late summer) and self sows. In really poor, compacted soil (e.g. a gravel-over-clay path) it'll mature at a foot high or less. If it sows itself in the hoop house, it'll be three feet or so.

Maybe Papaver somniferum? Thank you!

{{gwi:370611}}