Re: Cult: Seedling frost sensitivity.
Ian E. & Shirley Efford wrote:
> Jan Clark asks about frost protection for iris seedlings. Most iris
> tolerate down to minus 35-40C without any problems and I am sure that is
> slightly below just about anywhere in Australia! The ones that would
> have trouble are some of the more sensitive warm climate species -
> tridentata, verna, possibly the Californians, etc.
> Ian, in Ottawa where he is trying to grow all the species that are not
> said to grow in cold climates.