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Grafted Trees in London. What is Grafting and How to Gratf a Tree?

145 views · Published 1 May 2018 · 2:36 · Indexed 10 November 2026

Channel: Adevăruri Istorice Ascunse 🇷🇴 · 2018 · Science & Technology

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What Is Grafting? Grafting describes any of a number of techniques in which a section of a stem with leaf buds is inserted into the stock of a tree. The upper part of the graft (the scion) becomes the top of the plant, the lower portion (the understock) becomes the root system or part of the trunk. Although grafting usually refers to joining only two plants, it may be a combination of several. A third plant added between two others becomes the trunk or a portion of it. This is called an interstem.

Why Graft? Some cultivars (varieties) of plants do not come true from seeds. The seed from a Haralson apple will produce an apple tree, but it will not produce a Haralson apple tree. In other words, fruit trees cannot be reproduced "true" to the original cultivar from seed. They can only be reproduced by grafting. Grafting (top working), is a way to change a large tree from old to a new variety. It is also a method of using a root system better adapted to soil or climate than that produced naturally by an ungrafted plant. By using special understocks or interstems, grafting is a way to produce dwarf plants.

What can be Grafted? Most varieties of a particular fruit species are interchangeable and can be grafted. Because of differences in vigor, some are better able to support others as understocks. Plants of the same genus and species can usually be grafted even though they are a different variety. Plants with the same genus but of a different species may often be grafted. But the result may be weak, short-lived, or they may not unite at all. Plants of different genera are less successfully grafted although there are some cases where this is possible. Plants of different families cannot be grafted successfully.

What Trees Can Be Grafted? Young, vigorous fruit trees up to 5 years old are best for top working. Older apple and pear trees of almost any age can be top worked but the operation is more severe and those over 10 years old must be worked at a higher point. Young trees should have 1 to 2 feet of branch between the trunk and the graft. Otherwise the good crotch formation of the understock will be lost by the trunk expanding past the union. Trees up to 5 years old can be grafted at one time. On older trees about half--the upper and center part only--should be worked at one time. The remainder should be worked a year later.

How to Collect and Store Scions. Scion wood may be collected during the winter. It should have a diameter of 1/4 to 3/8 inch. If the scions are left on the tree until spring, there is some danger that the buds will start to grow or be injured during winter. Store in a cold, moist place at temperatures close to 34 degrees F. At home, a few scions could be stored in a plastic bag in the refrigerator with moist paper towels. Do not store in a freezer.
https://www.ag.ndsu.edu/hort/info/fruit/graft.htm

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