As long as the scions are dormant, it’s fine. The window to graft dormant wood to a growing trees could extend into July, as long as the scions remained dormant (refrigerated and sealed).
I now prefer bark grafts to cleft grafts when ‘top working’ an existing tree. So waiting for the ‘bark to slip’ as the sap flows is best. Otherwise, you’re attempting to match cambial cells at tiny delicate crosses just under the bark of each piece.
If you’re grafting to one year rootstock (bench grafting), no problem, a ‘whip & tongue graft’ makes plenty of contact.
Awesome! Thanks for the reply. Sounds like I'll be in good shape. I'm a beginner when it comes to grafting so I had to look up bark vs cleft grafts :). I'm trying to change some of my crabapples over to wickson and changing a few branches of my fuji over to newtown pippin and ashmeads kernel. Hopefully I have good success this year
HOS offers a grafting class, actually three separate sessions the same day, 2 beginning and one intermediate. This year's grafting class is Saturday 2/24. The grafting class registration is run through Clackamas Community College. There is a nominal fee, participants must pre-register. Highly recommended if you are getting the grafting bug. My first grafting happened there. You will come home with an apple tree with your selection of (probably 1 of 3) rootstock and scion (1 of 5-7 variety). I came home with three different trees, one from each session. Look to the details and registration link at the top of the page under events. If interested sign up. Class is popular and there's a participant limit, so your consideration should be timely.
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