On Thu, 04 Oct 2007 08:14:49 -0700, Chuck Gould
wrote:

Don't some of the Florida citrus growers have to run "smudge pot"
heaters, sometimes, to prevent freeze damage to crops?

Most of them are now using the large circulating fans similar to the
California vineyards. They keep cold pockets from forming in the
hollows.

Central Florida gets freezing weather down as far as Lake Okeechobee
and a bit beyond.