Zone 24
Stretched along Southern California’s beaches, this climate zone is almost completely dominated by the ocean. Where the beach runs along high cliffs or palisades, Zone 24 extends only to that barrier....
View ArticleZone 23
One of the most favored areas in North America for growing subtropical plants, Zone 23 has always been Southern California’s best zone for avocados. Frosts don’t amount to much here, because 85...
View ArticleZone 22
Areas falling in Zone 22 have a coastal climate (they are influenced by the ocean approximately 85 percent of the time).When temperatures drop in winter, these cold-air basins or hilltops above the...
View ArticleZone 21
The combination of weather influences described for Zone 20 applies to Zone 21 as well. Your garden can be in ocean air or a high fog one day and in a mass of interior air (perhaps a drying Santa Ana...
View ArticleZone 20
In Zones 20 and 21, the same relative pattern prevails as in Zones 18 and 19. The even-numbered zone is the climate made up of cold-air basins and hilltops, and the odd-numbered one comprises thermal...
View ArticleZone 19
Like that of neighboring Zone 18, the climate in Zone 19 is little influenced by the ocean. Both zones, then, have very poor climates for such plants as fuchsias, rhododendrons, and tuberous begonias....
View ArticleZone 18
Zones 18 and 19 are classified as interior climates. This means that the major influence on climate is the continental air mass; the ocean determines the climate no more than 15 percent of the time....
View ArticleZone 13
Ranging from below sea level in the Imperial Valley and Death Valley to 1,100 feet around Phoenix, Zone 13 is a subtropical desert. Average summer high is 107°F (42°C); the world’s second highest...
View ArticleZone 11
This climate zone shares similarities with its neighbors—the cold-winter Zones 1, 2, and 3, and the subtropical low desert, Zone 13. Like Zones 1 to 3, Zone 11 has cold winters, and like Zone 13, it...
View ArticleZone 3
Zone 3A East of the Sierra and Cascade ranges, you can hardly find a better gardening climate than Zone 3a. Winter minimum temperatures average from 15 to 25°F (–9 to –4°C), with extremes between –8...
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