North American Fruit Explorers mailing list at ibiblio

[R F Hollaus <hollaus@comcast.net>]

Jay is correct: 
The only frosty conditions that can effect the ones at the 
university are ones that occur way before they open.  

The area is also in full sun and there is always a nice 55 degree 
day that native bees are in full force during this time and it is 
never windy that time of year. 

>From one of the university trees I made one good graft to sweet 
cherry roots and then moved it to SW Washington. I had to move the 
tree to Cle Elum WA where there was snow each winter to get any 
fruit set from the flowers. I also had to cross with pollen of 
another pin cherry. 

Another one that is a single yard tree away from the university 
enough that it is impossible bees are crossing fruit only slightly.

Rupert.

----- Original Message -----
> Jim,
> 
> Could it be that, if they have consistently cold weather in the
> spring,
> the cold is keeping them dormant longer so they don't flower until
> after
> the danger of frost?
> 
> Regards,
> 
> Jay
> 
> Jay Cutts
> Director, Cutts Graduate Reviews
> Lead Author, Barron's MCAT Prep Book
> Lead Author, Barron's LSAT Prep Book (2013)
> (505)-281-0684
> 10 am to 10 pm Mt Time, 7 days
> 
> On 12/26/2012 9:27 PM, Jim Fruth wrote:
> >      A professor at the University of Alaska - Fairbanks told me
> >      that Pin
> > Cherry trees, Prunus pennsylvanica L., that grow there were imported
> > from
> > the lower 48. That area typically gets -40 F in Winter. A former
> > NAFEXer
> > in that area grows them and claims that they bear fruit every year.
> >      I have Pin Cherry trees, here in Pequot Lakes, Minnesota, where
> >      the
> > temperature rarely dips that low and my trees bear fruit only once
> > or twice
> > in ten years. So what is the possibility that Pin Cherry requires
> > bitterly
> > cold weather to bear fruit? Anyone have an idea???
> >
> > Jim Fruth
> >