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(1) Photo of a Delayed Graft Failure. (2) What rootstock is used in HOS Grafting Class?
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DanielW
Clark County, WA
519 Posts
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1
December 4, 2018 - 7:51 pm

These are two unrelated topics except for they both relate to grafted apple trees.

First, this summer I noticed that a branch had fallen off of one of my multigraft trees.  It was one of my favorites - Pristine Apple,  a PRI disease-resistant cultivar with early, sprightly flavored apples.  I never took a good look until today.  I thought it broke off due to overbearing and lack of thinning.  What I saw today, was that the branch had grown to a decent size, without the heartwood ever fusing together.  It held together via the cambium and bark.  It diden't splinter and split, it just fell off.  This was on M106 rootstock.  I bought the tree from Raintree in 2014.  Also grafted to this rootstock are Queen Cox and Rubinette, and those graft unions continue to appear strong.

Graft failure

I also have a question for more experienced HOS Members.  I took the HOS Grafting class in 2013, and took home the Sutton Beauty that I grafted there.  It is now Sutton Beauty with additional grafts of Baldwin, Liberty, Airlie Redflesh, and Newtown Pippin  This tree is small - under 8 feet tall.  My question is, what is the rootstock?  I never wrote it down.  Does HOS use the same rootstock every year?  Is there a way to find out?

Thanks for any input..  I always enjoy reading this forum

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jafar
763 Posts
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December 5, 2018 - 1:53 am

Daniel, I'd ask Joanie.  I  think she arranges the rootstock purchases, and the material for the grafting class.  

I Don't think they are always the same at the grafting class.  I think years back there may have been multiple choices.

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GH
Battle Ground, WA
127 Posts
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December 6, 2018 - 5:00 pm

I took the grafting class in February, and we were given M9 rootstock.  That seems to fit with the small size of your tree.

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DanielW
Clark County, WA
519 Posts
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December 8, 2018 - 7:58 am

Thanks for the info.

I agree that M9 makes sense.  If I knew then what I know now, I would have kept better track.  That tree is a good size for my fenced-in area, so I'm happy with it.

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buzzoff
84 Posts
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December 8, 2018 - 2:02 pm

Yup!  I had exactly the same thing happen to my Hudson's Golden Gem tree, a few years back.  Same appearance.

Whole tree, just snapped off, at the graft-union.  Pretty good sized tree; 3 to 4 inches in diameter.  Never did get to taste that fruit.

I was under the impression that the problem was graft-union incompatibility.   Might have been on 106.

I could be wrong, but I'm thinking.... sometimes the grafting magic just doesn't work properly.  Scion and rootstock, don't really like each other, and they abruptly divorce.

 

https://extension.umd.edu/hgic.....ft-failure

 
 
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