Haemanthus growth trigger

Peter Taggart petersirises@gmail.com
Fri, 14 Aug 2015 11:37:12 PDT
I agree with Jim, and caution against being quick to water Summer dormant
bulbs, in pots, too early. Watering early, if it is done, should be no more
than a light damping down. The species of Haemanthus which I have grown do
not need a drenching to tell them when to grow.
Wait for fluctuating Autumn temperatures.
Peter (UK)

On 14 August 2015 at 16:54, James SHIELDS <jshields46074@gmail.com> wrote:

> 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:
> >
> > 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?

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