Zone 1Northeastern ZoneNew York New Jersey Delaware West Virginia Virginia New Hampshire Maryland District of Columbia Massachusetts Vermont Maine Connecticut Rhode Island Pennsylvania | Zone 2Southeastern ZoneNorth Carolina South Carolina Georgia Florida Alabama Mississippi Tennessee Virgin Islands | Zone 3Midwestern ZoneMissouri Michigan Indiana Illinois Wisconsin Iowa Kansas Kentucky Ohio Minnesota Nebraska | Zone 4Southwestern ZoneArkansas Colorado Louisiana Texas Oklahoma New Mexico British West Islands | Zone 5Western ZoneMontana Arizona Oregon Alaska California Washington North Dakota South Dakota Hawaii Nevada Utah Wyoming Idaho |