That's the kicker, see. Other than the sickly leaf color, it is growing slowly, and (obviously) blooming. I don't think it will die this summer, especially if I treat it again with iron chelates.
December is variable - can be brutal cold with snow on the ground, or not all that cold, in Salt Lake. We lived there for 21 years before migrating to FL. I've had roses blooming in my former garden there in early December. Last winter they had it very mild and hardly any snow. I wouldn't think the ground would be too frozen to move the plant then. Just wet, and icky sticky.
Thanks, that helped me make up my mind to wait. I can prepare the new site when I visit next week, so it's ready to go when moving day comes along.