Topworking backyard fruit trees is challenging but rewarding


Last week I wrote about why fruit trees were grafted to produce shorter specimens. A few people asked me exactly how it was done and the best time to do it.

As usual, questions like that seldom produce a simple answer. There are several techniques and they generally aren’t all performed at the same time of year. Cleft grafting is probably the appropriate choice in most situations. Cleft grafting is best performed when the stock (lower part) is beginning active growth in the spring. The scion (upper part) should still be dormant.

The first step is to obtain dormant scion wood about as big around as a pencil from the tree variety you want a few weeks before grafting. Some people even collect scions in early winter. Store them in the refrigerator. Choose a spot on the existing tree where the trunk is about two to four inches in diameter and clear of any side branches.

When the tree’s buds begin to swell it’s time to graft. Start by sawing off the stock at a 90 degree angle. Split the trunk with a chisel, hatchet or specialized grafting tool. Install a narrow but thicker wedge in the middle to spread and hold the split truck apart. Now you’re ready to install the scions.

The next few steps are the ones that are critical to success. Clip your dormant scions so that when installed there will be two buds above the graft. Each graft requires two scions. Taper the sides of the lower two to three inches of the scions to form points. Make sure the tapers are slightly pie-shaped so that the thicker side can be toward the outside.

Now comes the most critical step. Press the two scions into the stock making sure the inner bark layer of the stock and scion line up perfectly. This region is what we call cambium tissue. It is a place of rapid cell division where tissues can merge because they are not specialized. Remove the center wedge so the stock will grasp the scions tightly.

Check to make sure scions are still straight and cover the entire area including scion tips with grafting wax. It has a low melting point. Tree wound dressing works but not as effectively. Try not to get any wax on the young buds.

In a few days inspect each graft, and apply more wax if necessary. Stocks will begin to sprout beneath the graft. These suckers should be removed. Remove side shoots from new scion growth too. This makes grafts less wind susceptible. Some people even stake the new growth. After the first season clip off the weaker of the two scions. Leaving both new stems results in a poor graft union. In two or three seasons the trees should begin to fruit.

Some people use this cleft graft technique to attach a single scion to a much smaller stock. Both pieces are usually about pencil sized and the scion taper is evenly opposite and not slightly one-sided.

This is only one of many techniques used to topwork fruit trees. Another is called t-budding. It is done during active growth. I’ll address that technique next summer.

 

Ted Manzer teaches agriculture at Northeastern High School.

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About tedmanzer

I grew up in Old Town Maine and got a B.S. at the University of Maine in Plant Sciences/ minor in Botany. From there I moved to West Virginia and earned a M.S. in Agronomy at WVU. I also met my wife there. She grew up in rural WV as the daughter of tenant farmers who raised cattle and hogs. Their lifestyle at times was one of subsistence and I learned a lot from them. I've always been a foraging buff, but combining my formal botanical knowledge with their practical 'Foxfire-type' background opened up my eyes a little more. I now teach agriculture to high school students at Northeastern High School in Elizabeth City, NC. My wife teaches with me and we make a great team. I also write a weekly nature/foraging column for the local paper (dailyadvance.com) and frequently publish articles in several other newspapers in northeastern North Carolina. I also have written several Christian nature/adventure novels that I plan to publish eventually. One is a five book family saga I call the 'Forgotten Virtues' series. In the first book, Never Alone, a young boy comes of age after his father dies in a plane crash, and he has to make it alone. Never Alone is now available in paperback, Kindle and Nook. The second book, Strange Courage, takes Carl from his High School graduation to his recovery from a nasty divorce. The third book, Second Chances, takes Carl from his ex-wife's death and the custody of his son to his heroic death at age 59. The fourth book, Promises Kept, depicts how his grandchildren react and adjust to his death. In the final book, Grandfather's Way, his youngest and most timid granddaughter emerges from the shadow of her overachieving family and accomplishes more in four months than most do in a lifetime. I use many foraging references with a lot of the plants I profile in these articles in those books.
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