Hi, Ray,

Intentionally, no. But there have been occasions when we've had a cooler
than normal night, without warning. It hasn't bothered them. If we are
expecting cold weather (and yes, we do get some) I bring them inside, along
with the Vandas. Everything else gets covered. It's a pain, but such are the
vagaries of growing in my environment.

Of course, you are right about the 10-15 degree differential.

Diana

"Ray B" wrote in message
news:000001ca6ea5$97e1fe70$0d01a8c0@fro...
I would NEVER intentionally expose a phalaenopsis to 40°F! I try to
avoid letting mine go below 60°.

"Cold" is not necessary to induce spiking; a couple of weeks of 10°-15°
cooler overall temperature than their normal growing temp is.

Ray Barkalow - First Rays LLC - www.firstrays.com
Orchid Plants, Supplies, Equipment, Books
Artwork, Free Services & Lots of Info!

-----Original Message-----
From: Diana Kulaga ]
Posted At: Wednesday, November 25, 2009 8:22 PM
Posted To: rec.gardens.orchids
Conversation: lowest night temp?
Subject: lowest night temp?

Eek! I don't think I would do a Phal in snow, even though I find them to
be
quite hardy in fairly low temps. Forty makes spikes, as long as it's not
for
any length of time.

Diana (exNY, FL now)