The few summer active SA bulbs I have (Cyrtanthus, Eucomis) overwinter under my porch here in San Jose. Temperatures down to around freezing on a few nights, but only for a few hours just before dawn. Most nights around 40-45 F, maybe 60 F during the day.
My winter active SA bulbs (Lachenalia, Massonia, Daubenya, Albuca, Boophone, Veltheimia) I also keep outdoors during the Summer, under staging against a sunny wall (maybe 90-100 degrees most days, 110 when it's a bit warmer, down to 50-60 at night). Everything stays potted up so I'm not sure what temperatures the bulbs themselves experience. I keep them completely dry. I haven't had any issues, even with seedling bulbs.
On Wednesday, December 18, 2019, 08:15:29 PM PST, Arnold Trachtenberg via pbs <pbs@lists.pacificbulbsociety.net> wrote:
Sylvia:
I over summer my SA bulbs in a cool North East basement. Temps are maintained at around 55-60 F.
I have not given any water during this period.
The Lachenalias, Gladiolus, Ferrarias, Haemanthus, Massonias and Freesias have all done well.
I have thought about an occasional spray of water but so far there haven't been any losses.
I'd be interested in what others do with their winter growing SA bulbs in Summer.
The greenhouse reaches 110-120 F in summer even with an aluminized 50% shade cover..
ArnoldNew Jersey
-----Original Message-----
From: Sylvia Sykora <slsykora@sbcglobal.net>
To: pbs <pbs@lists.pacificbulbsociety.net>
Sent: Wed, Dec 18, 2019 3:39 pm
Subject: [pbs] DORMANT TEMPERATURES
I’m finally attempting to better address winter dormant bulb requirements and am uncertain what is meant by “warm and dry” and “cool and dry” in this situation.
I live in the San Francisco Bay Area so “dry” in our winter means indoors or somewhere outdoors but covered. That latter is limited to a very small covered plant stand. Indoors is pretty much limited to the garage, basement, attached potting shed or the unheated laundry room off the garage. Alas, we have no warming cupboard here
For the first time I’ve used a thermometer and find that all my usual winter storage spots measure close to 50 degrees F. Is that warm or is it cool?
Can anyone suggest what temperature range would cover both “cool” and “warm,” particularly for South African species, and how you go about achieving that end?
Many thanks,
Sylvia Sykora
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