[nafex] Re: chilling hours
victoria l. caron
vicaron at gis.net
Tue Jun 12 05:20:30 EDT 2001
Most heating oil and other utility companies keep a record of 'degree days.'
While this isn't a detailed temperature record, but an average, it may still
supply you with some information.
vic NH zone 3
del stubbs wrote:
> I dont know how to figure chilling hours ....we certainly had 4 months
> completely below freezing, much below 0. I'd say an absolute minimum would
> be 3000 hours below freezing and probably a lot more. I'll call around and
> see if there is actually some gov. agency that actually records such info.?
> any idea where to learn the chill req. of manchurian apricot? Mn. Del
> >From: "Kieran or Donna" <redherring at tnaccess.com>
> >The chilling hour clocks on stone fruits tick only between 34 and 45
> >(anyone want to fine tune my numbers, which are from memory). Your trees
> >might have clicked off some of the time, but then you got them warm. they
> >stopped ticking. They're like apple trees I have heard of in Florida that
> >went dormant, stayed bare a whole summer, and leafed out the following
> >spring. Apricots in general have short chilling requirements, that is why
> >they do so badly for us with our mild southern winters. They're likely to
> >bloom in Febuary here. You may indeed have to chill your trees to get
> >to come out. Maybe a block of ice wrapped up with the pots would do the
> >job. How many hours in a week? What do apricots generally need? 500-600
> >hours? Do you think you got half that much before you brought them in?
> >Donna in TN
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