Claude Barr's Jewels of the Plains may be worth looking at. The book is probably out of print, but I've seen it in libraries. Eugene Zielinski Augusta, GA > [Original Message] > From: Boyce Tankersley <btankers@chicagobotanic.org> > To: Pacific Bulb Society <pbs@lists.ibiblio.org>; diana chapman <rarebulbs@earthlink.net> > Cc: > Date: 11/12/04 11:41:43 AM > Subject: RE: [POSSIBLE SPAM ] - Re: [pbs] Calochortus--TOW - Bayesian Filterdetected spam > > 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 > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php