31 degrees F or C? Ouch. The flowers can burn with all day sun in either of those temps. Are these recent plantings? Seems like the plant in the middle of pic #2 might have something else going on with it since there aren't a lot of leaves on it.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb