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 Other timely requirements for cherry scions 
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Joined: Sun Aug 06, 2006 5:03 pm
Posts: 82
Location: Vancouver WA
Post Other timely requirements for cherry scions
Sweet cherry and possibly other stone fruits bud swell in the fridge which reportedly "bud swell" results in poor graft take in sweet cherry.

Around Portland or where ever it applies that we are not consistently freezing right now, collect ASAP. Here's why;

Having taken my problems recently to the northern fruit explorers group NAFEX. One privately and one publicly of two experts explained to me that, for them, better rates can be attained collecting scions as soon (or even earlier) as the chill requirements were met, and then store them as low as a temperature in the fridge to freezing that you can.
Goal: To keep buds from swelling.

So then I would not delay harvesting sweet cherry if you can find a cooler place than what we have here outdoors. Even a fridge set at 40 degrees is better than nothing. But unfortunately the buds will still swell and right there this is where I lose the battle,
they say: 32 degrees is better than 40.

Personally I do not have 32 degrees. So then I found scientific experiments regarding freezing tolerances of sweet cherries of which almost all other fruit types that we talk about here applies for. These read that five degrees, as in my freezer, is a perfect warm enough place to hold scions, which is what I am doing.

There are a few restrictions because I think you might want to ramp colder over time. For example what I do is use a 12 volt cooler that runs all the time and inside the cooler it is always 20 degrees lower than the surrounding temperature. In this case placing my cooler outdoors, the interior temperature attains 20 degrees. I hold scions of all types in there that I collected even 10 days ago. I hold them there 24 hours at a time starting with plugging in the 12 volt power supply. 18 hours of 20 degrees is I think is more than enough, at which time I transfer to my freezer compartment for the winter at 5 degrees.

Degrees being all in Fahrenheit.

I am interested in your experiences. I can also post a link to an organized read only links page that point out the data I'm drawing my conclusions to you from.


Mon Dec 24, 2012 9:53 pm
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Joined: Sun May 15, 2005 10:57 am
Posts: 1355
Location: Portland, OR
Post Re: Other timely requirements for cherry scions
I have had lots of success whip and tongue grafting pie cherries and none whip and tongue grafting sweet cherries.

At this point, due to limited time, etc., I think I will only w and t graft pie cherries, and bud both sweet and pie cherries.

I am however, very interested in your experiments. I always find that I get a few good angles when I try to understand the process of your experiments.
Thanks
John S
PDX OR


Mon Dec 31, 2012 7:46 pm
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