Timing for bulbs changing hemisphere?

Paul Tyerman ptyerman@ozemail.com.au
Thu, 03 May 2007 18:33:15 PDT
Howdy All,

I need some brain-picking of experience please?  What is the best 
time to try to change hemisphere for bulbs and corms?  Is it sending 
them straight after they go into dormancy, or is it best to give them 
some "summer" (or winter in the opposite case) before sending them to 
the recipient?  Or is it better to wait until they are just starting 
to resume growth and send them then, so that they can grow and then 
work out their new hemisphere?  I am particularly thinking things 
like Crocus, Fritillaria, Galanthus, Tecophilea and the like (to give 
a few examples). Due to my continuing crappy health I am very much 
behind in sending traded plants to people and I am now wondering 
whether I should just wait until late spring (for most of the 
examples I just used) and send them straight after they have gone 
into dormancy, or whether now would be OK, with root growth commenced 
and signs of activity with the bulbs?  I have had experiences in the 
past where recipients have lost bulbs in both situations, and I am 
guessing that the handling at their end makes a great deal of 
difference as well, but I am just trying to do the best at this end 
to give the bulbs as good a chance as possible.

Also, does the fact that I tend to have hot and lengthy summers 
affect that shift at all?  There are specifically a couple of 
recipients I want to send to in Germany, and I know that their 
summers are not as hot as mine, so I am thinking that their summer 
may initially be treated, by the moving bulb or corm, more like a 
spring or autumn here and therefore not as stressful for them and 
therefore not force them back into dormancy as quickly?

I have seen various different recommendations on the Net as to when, 
but I thought I would like to hear some of the thoughts of the 
experienced collectors we have here from other countries who do not 
have our quarantine laws, and therefore may have shifted bulbs over 
hemisphere and have found out what has worked for them.  If you'd 
prefer to send privately then go for it, but I am thinking that there 
may be others here on the list who would be interested in the 
collective experiences as well.

If I take a while to respond to anyone then I apologise 
profusely.  It usually means that my CFS has stopped me using the 
computer much.  I'll try to catch up with emails as soon as I can.

Thanks you all very much in anticipation of any advice you can give 
me re timing and helping with changing hemispheres.


Paul Tyerman
Canberra, Australia - USDA Zone Equivalent approx. 8/9

Growing an eclectic collection of plants from all over the world 
including Aroids, Crocus, Cyclamen, Erythroniums, Fritillarias, 
Galanthus, Irises, Trilliums (to name but a few) and just about 
anything else that doesn't move!! 

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