A big difference between night and day temperatures is something I don't have in my maritime climate. One day when I was in Middelpos, South Africa, it was plus 23 in the daytime and minus 8 at night. That is the variation my city experiences between between a summer day and an unusually cold winter. Imagine having it within 24 hours - and yet, there were many flowers blooming, and probably seeds busy germinating. Sent from my iPod On 2013-05-04, at 8:02 PM, "Michael Mace" <michaelcmace@gmail.com> wrote: > Dave wrote: > >> I'm not certain as to how important this chilling really is > > > What they seem to need (is) > a good swing between nighttime and daytime temperature. > > They will be hardy to light frost, but protect from temps below 20F (-6) >