New Hardiness Zones
I couldn't find a thread on this, so ignore it if it's a duplicate.
It seems all the zones are moving upwards. Venice is now in 9b, and Gainesville is in 9a. They have known this a long time, but the info was squashed by the Bush administration because it didn't jive with their denial of global warming.
Here is a link that might be useful: New USDA Hardiness Zones