I am having a very mild winter. Not even 2 inches of snow at a time, and while I like the weather, don't we need more snow for the iris? We've had cold and even some rain but ...?
What kinds of irises are you growing? Tall bearded irises don't need snow, and I can't imagine Louisiana irises do either.
Mostly hisotirc tall bearded ones. I think my fear is the other shoe dropping. I have 22 new rhysomes given this year and am anxious about them all making it Even if all I get is one or two years of them. I know they are in Gods hands but anxious anyway.
I understand your concern completely. I to have many new bearded iris and many are historics. This winter has been very mild and the snow has been melting. Luckily for me, I still have a bit of snow covering....but it is getting down. So I can't believe I am saying this, I am hoping for a good snow fall.
Without snow cover if the temps turn very cold, there could be loses. It is the freeze thaw that causes the problems and the plant cells can only take that for a bit, then the cells burst which means the plants die. Good snow cover prevents this by keeping a fairly steady temp till spring.
Lets hope to get a good snow cover or that the temps stay steady until spring arrives. We don't have the control, so it is just wait and see what happens.
Our winters rarely have temps below low twenties, & those only for a few days at a time, & bearded iris love it here.
I'm in zone 5 too, and in Denver, we rarely have a snow cover. It usually snows one day and melts the next, and our temperatures can go all over the place. The tall beardeds have never had any problem with this. I haven't lost very many at all. Just Superstition which would never grow for me.
My friends in Flagstaff, AZ (also zone 5) never have any problems either, and snow cover is extremely variable there too. Temps down to -30Â° some years. Glad I don't have to live in that anymore! Brrr!!
Kevin : )