Hi Diane,
I'm sure I get more sun in winter than you do but of course it gets much colder here. To deal with that I have a large (300 gallons) tub of water as a heat sink; also, the greenhouse is attached to the south side of the house. In any case, it only goes down to freezing but not below, except near the glass. For you I would think a greater concern would too little light for growth, bad for geophytes but no problem for summer-growering winter-bloomers like camellia and cymbidium. A fair number of the species I describe fall into this category.
I hope that helps, and I'll be interested in further thoughts.
Jim Jones
-----Original Message-----
From: Diane Whitehead <voltaire@islandnet.com>
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Sent: Thu, Jun 7, 2012 4:37 pm
Subject: Re: [pbs] New book
How applicable would your information be to those of us who rarely see
the sun in winter?
My unheated greenhouse manages to keep itself frost-free but if the
sun does come out, the temperature may go up only a degree or two.
Diane Whitehead
Victoria, British Columbia, Canada
cool mediterranean climate
moderate dry summers, moderate rainy winters
68 cm rain (27 in)
On 7-Jun-12, at 1:08 PM, James L. Jones wrote:
> The book presents detailed information on operating a greenhouse
> that is heated by the sun alone and on choosing a satisfying array
> of off-season bloomers that do well under its conditions,