Author Topic: Summer maple grafting?  (Read 4393 times)

Josh

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Summer maple grafting?
« on: July 18, 2014, 10:18 PM »
I am in process of building branches on several trident and Japanese maples.  I placed thread grafts this spring which appear to be taking.  I want to place more thread grafts, and am curious as to others' experience with summer grafting?  Thinking of defoliating, push thru and secure.  Will have winter protection.  Thoughts?
 

Leo in NE Illinois

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Re: Summer maple grafting?
« Reply #1 on: July 25, 2014, 11:30 PM »
your profile says zone 4. This means it is now toward the end of the window of time needed for a branch that is defoliated to push new growth and have it harden off enough to survive the winter. If you are able to protect the tree from severe cold, say keep it above 23 F for the winter - then it might not matter. But if you let it experience anything colder, if you didn't do it last week, it is probably too late in the year.

Thread grafts in theory can be done just about anytime because they don't really cut off the flow of sap to the scionwood. But when you defoliate the branch to be inserted through the hole, be sure not to damage the buds at the base of the leaf petiole. You will have to remove the petiole to get the branch through the hole. In winter the buds are nice and tight and have a hard shell of bracts protecting the buds. So winter, especially late winter is the ideal time.

If you like wire the branches you are going to use into the arc's needed to make the grafts now - then they are already close to being in position from when you do the drilling and insertion late winter.

Those are my thoughts. With good winter protection, you could do it now. At my place - I would wait.

 

Josh

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Re: Summer maple grafting?
« Reply #2 on: July 26, 2014, 09:40 AM »
Leo,

Thanks for sharing your experience.  While I am in South Dakota, I might be cheating nature by using greenhouse, trees in shortly after fall color, out in May.  Don't get below 32.  This gives me maples and crabs pushing in February.  This year I did some grafting on maples and tridents, thread grafts taking, approach grafts failed.  Approach graft failure due to spitting out graft, need a better securing plan.  My tacks didn't hold well.  Trident buds are big for me by January, so thread graft holes may need to be bigger than I want.  This year, may do as you suggest, getting my whips wired into place now, ready for winter grafting.