In article .com,
"Christopher Green" wrote:

Dennis Hoy wrote:
That's bullshit. You may be in zone 9, or even zone 10 (maybe), but
you sure aren't in zone 19. There is no zone 19.

There is in Sunset magazine's system, which is at least as well known
to gardeners in southern California. Sunset divides mild-winter areas
according to microclimate, because this can make a big difference in
growing plants sensitive to dry air or even slight frost.

[Briefly, zone 19 is a zone with air drainage (thus less frost than
adjacent zone 18) and little or no marine influence (thus hotter and
less humid than adjacent zone 20). It is an ideal zone for citrus and
other frost-sensitive heat-dependent plantings, more challenging for
drought-sensitive things like evergreen azaleas.]

Sounds like a good zone to build a semi-shading pergola from which to hang
orchid cacti.

-paghat the ratgirl

--
"Of what are you afraid, my child?" inquired the kindly teacher.
"Oh, sir! The flowers, they are wild," replied the timid creature.
-from Peter Newell's "Wild Flowers"
Visit the Garden of Paghat the Ratgirl: http://www.paghat.com