Sorry for being late to the party. Thanks for inviting me along, Doc.
There are many styles to grafting persimmons, but when we are placing scions onto larger 1"+ stock, a bark graft is perfect. Others will hopefully post their techniques, but this one works very good for me and requires little expense. And let me ad, I don't believe anyone here is a horticultural expert. We learn by doing. I can honestly say that after studying apple and pecan grafting techniques, I went out and grafted my own trees with great success. You can do it too.
First. The grafting box. Here I keep a grafting knife (which is an ole timer pocket knife with broken tips. Works Great!) tags, tape, and other odds and ends. I also carry a sealant for covering the cut on the stock. My scions are dipped in candle wax on both ends to keep them from drying out in storage.
Cut your stock, which is the native persimmon with roots in the ground.
Make a cut on the scion. Basically, the cut goes in about half-way through the wood and then straight out to the end, leaving you with a long straight flap.
I make a small cut on the opposite side of the scion, which gives the scion a wedge shape. Great for insertion into the stock!
Next, I measure the scion against the stock and make two cuts along both sides. This creates a "flap" on the stock where we will insert the scion.
Flap on the stock where we will insert the scion. This should be a pretty tight fit!
Insertion...
I use electrical tape to close it up. You want to tape it in strong and tight. This allows the cambium layers (the green edges on your scion and the edges of the stock's bark) to press together.
Spray with sealant. Coat with tree wound sealer. Or use toilet bowl wax. The idea is to keep the large wound on the stock from drying out.