Haemanthus growth trigger

James SHIELDS jshields46074@gmail.com
Fri, 14 Aug 2015 08:54:51 PDT
Hi Stephen,

In my experience, the winter-growing sorts are triggered by temperatures
(chilly nights) and probably also the calendar.  An occasional flood in the
greenhouse does not usually start them growing in mid-summer.  Cool nights
in June do not start the bulbs to flowering.

Jim

On Thu, Aug 13, 2015 at 7:50 PM, Stephen Putman <putman@pobox.upenn.edu>
wrote:

> I'm trying to learn about Haemanthus.  I've had reasonable success with
> the summer growing and the evergreen species, but less satisfactory results
> with winter growing.
>
> What is the trigger for new growth in these winter growing species in
> autumn?  Is it temperature?  This would mean to wait for an appropriate
> temperature and then water.  If the trigger is water, then the issue would
> be at what temperatures would a moist medium be beneficial, and when fatal?
>
> Any other bits of knowledge about this topic would be gladly received by
> me, and possibly others who are not yet expert in the growing of these most
> interesting plants.
>
> Regards,
>
> Stephen Putman in central Delaware about a mile from the Delaware Bay, in
> the middle of the Cedar Swamp Wildlife Management Area.  No potted plants
> in bloom, but a nice show in the garden.
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-- 
James Shields             jshields46074@gmail.com
P.O. Box 92
Westfield, IN 46074
U.S.A.





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