[Original Message]
From: Boyce Tankersley <btankers@chicagobotanic.org>
To: Pacific Bulb Society <pbs@lists.ibiblio.org>; diana chapman

Cc:
Date: 11/12/04 11:41:43 AM
Subject: RE: [POSSIBLE SPAM ] - Re: [pbs] Calochortus--TOW - Bayesian

Hi Diana:

Can you refer me to anyone who has grown the high elevational =
Calochortus in the upper Midwest?

Many thanks,

Boyce

-----Original Message-----
From: pbs-bounces@lists.ibiblio.org
[mailto:pbs-bounces@lists.ibiblio.org]On Behalf Of diana chapman
Sent: Friday, November 12, 2004 9:32 AM
To: Pacific Bulb Society
Subject: [POSSIBLE SPAM ] - Re: [pbs] Calochortus--TOW - Bayesian Filter
detected spam

Dear Mary Sue and All:

I haven't yet brought my more difficult Calochortus species to bloom, =
but I
did conduct a little experiment with C. leichtlinii. I refrigerated =
half
the bulbs each winter, but left the rest outside in our mild winters =
where
we experience very little frost, and few nights even near freezing. The
refrigerated bulbs were much more vigorous when they came into growth =
and
bulked up at a much greater rate. In fact, the unrefrigerated bulbs did =
not
seem to increase in size hardly at all.

It is likely that Jane gets enough winter chill for her high altitude =
bulbs,
even though her climate doesn't come close to the Great Basin =
conditions, or
conditions at 6000'. I don't think any bulbs (or plants) actually need
freezing temperatures, but may need a certain amount of time at =
temperatures
between freezing and about 40F - that's why chilling crocus and tulip =
bulbs
in the refrigerator works. We had discussed some time back winter chill
needs of other plants, such as fruit trees, since this has been studied
extensively, and I believe one of our more knowledgeable members =
contributed
information regarding this. Winter conditions where I live are very =
mild -
not exactly warm, but probably not cold enough for some of the high =
altitude
Calochortus species to get the requisite number of hours of winter =
chill,
although that very likely will vary according to species.

Diana

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