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Crown graft, reproduction technique for fruit trees with many advantages. For example, it helps the plant adapt to the soil and climate, prevents some diseases, facilitates the renewal of the varieties of orchards. This is a very common operation when it is necessary to revitalize and expand the productivity of fruit plants such as plum, apricot, almond and cherry.
To perform thecrown graft it is necessary first of all by cutting the scions in time, at about 10 cm, making sure they have 3-4 buds, as regards the period of execution and the method, we can refer tosplit graft. The same also applies to the technique of taking the scions themselves.
There is often a variety of rootstocks to choose from which makes this technique suitable for various situations. Once the most suitable has been identified, proceed by making a vertical cut and gently detaching the two flaps of bark from the wood, being careful not to damage them.
The scions should have already been prepared before flowering, they must be taken and sharpened only on one side, finally debarked. Just by taking them from the "naked" side they fit the scions in the rootstock, where we cut it, and binds with raffia or, as often recommended, with electrical tape. Before leaving and waiting for patients, we sprinkle everything with mastic, the one especially for grafts.
Crown grafting: the right time
Crown grafting works on almost all fruit plants, but the period changes and it is not trivial. This is because each plant follows its seasonality of development, it does not bloom all at the same time and the most suitable period forcrown graft it is what just precedes the arrival of the flowers. In this way you find yourself working with a plant that peels well.
Once the scions are taken, they are usually kept in the fridge, unless you get them at the moment but it is not always possible to combine the periods. In general thecrown graft it is carried out from the first days of March to the beginning of April, it can be done both to re-graft adult plants at home and for young plants in the nursery and usually does not present problems of adhesion between rootstock and nesto.
Before seeing specifically how some fruit plants behave, I can already give the example of the plum tree, which lends itself tocrown graft in May-June, or that of the almond tree that prefers to play early, in April, and often already in the first ten days of March you can act.
Crown graft: citrus
In the case of citrus fruits, grafting is often carried out to prevent certain plant diseases that affect the roots, in particular it is usedcrown graft it is used on large diameter stems or branches, also to re-graft plants whose productivity has decreased, or to change the cultivated variety.
Between rootstocks used for citrus fruitsThere are many, there are bitter and sweet orange, trifoliate, hybrids of trifoliate orange, some types of lemon, mandarin and lime. In Italy, for example, thebitter orange which boasts a good resistance to frost, it allows to obtain plants with an excellent fruit quality, of small size. Too bad it is incompatible with the “Monachello” lemon variety.
Another common rootstock is the trifoliate orange: it requires good quality water but resists freezing, ensures high production and excellent quality. This plant goes well with mandarins, oranges, kumquats and, in general, with plants grown in pots. The Citrange it is used instead for oranges, grapefruits, mandarins and lemons: it adapts to a considerable variety of soils, but it needs good quality water, it reciprocates with an abundant production and large and good fruits.
Crown graft: fig
The fig is usually subject to crown grafting when you want to change the variety, it also lends itself to the bud. The latter is usually recommended for the domestic fig. L'crown graft it is suitable instead for the wild fig and is practiced in spring, when the bark easily detaches from the wood, with the foresight to notice if the plant should prove not very resistant. In this case it is necessary to fall back on splitting techniques common or bud.
Crown graft: apricot
As early as February-March you can start thinking about practicing there'Crown graft on apricot trees even if the decision is delicate as there may be disaffinities between the trees we want to use, except with the plum tree. Once thecrown graft, however, we get the possibility of making the plant adapt to previously unthinkable environmental circumstances.
As soon as the buds begin to swell, you can start practicingcrown graft, generally choosing interesting varieties on vigorous and fruiting rootstocks. Among the most popular rootstocks for apricot we find the franc apricot, the seeded myrobalan and the Montclar (P.persica) unfortunately sensitive to nematodes.
Crown graft: cherry
For the cherry tree the period from crown graft the best is between March and April. This much loved plant, especially by me, deserves a few more lines. It belongs to the Rosaceae family and there are two species: the sweet, very common in Italy, and the cerasus (black cherry), the acid, widespread more in northern Europe.
Then there is also the Megaleppo or S. Lucia cherry tree, arriving from the Black and Caspian Seas. Between favorite rootstocks dal from the cherry tree there are the Franco di sweet cherry, sensitive to limestone and drought, the aforementioned Magaleppo, suitable for hot areas, and the MaxMa 14, a hybrid with intense branching.
Crown graft: olive tree
The olive tree can also be the subject of crown graft, the right period is the one that goes from mid-April to mid-May because in those days it is almost time to bloom. In general, this technique gives excellent opportunities for rooting and a good quality of production. As regards the olive tree specifically, it should be remembered that it cannot reproduce well by seed.
This means that the crown graft is one of the main methods of propagation. Usually, it is done by experienced growers, but gardeners can also try it, it is a technique that is seen in Italy practiced in agriculture, in nurseries and even in gardens.
Crown graft: video
To conclude, a video that briefly illustrates thecrown trigger and it satisfies, I'm sure, your curiosity about it. Then all that remains is to try, I would start with the olive tree, since for this plant is the crown graft it's almost vital.
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