Well, here in Santa Clara County, we do have a record of chill hours and
routinely give out that information. Now as to whether the master gardener
answering the phone knows anything about the chill hours required of different
peonies, that is a different matter. I doubt it.
The chill hours are usually used to explain why certain healthy fruit trees
aren't bearing fruit as we live in a climate that is best served by trees
requiring less chill hours. Of course, the nurseries will sell you what you
want.