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Okulating is the most important technique for multiplying the numerous garden varieties of the roses. The term is based on the Latin word "oculus", in English "eye", because in this processing technique, a so-called "sleeping" eye of the noble variety is inserted into the bark of the processing base. Ideally, it uses a special oozing knife. It has a so-called Rindenlöser on the back of the blade or on the other side of the knob. By the Okulation rose cultivation became possible in a big way. At the same time, it is one of the simplest finishing techniques, which with a little practice also beginners succeed.
In July you can either refine even rose plants - often used are the seedlings of the multi-flowered rose (Rosa multiflora) or the dog-rose variety 'Pfänders' (Rosa canina) - or simply refine an existing rose in the garden by putting a new eye in the garden Root neck or as in our case in a shoot.
It is important that the roses are well in the "juice" at the time of finishing in July, so that the bark can be easily solved. They should therefore have been planted in the previous year and always be well watered in dry weather.
Step by step: oozing roses
Separate the eye with a grafting knife (left) and remove the wood chip on the back (right)
The eye of the noble variety lying in the Blattachsel is first separated from the Edelreis with a clean sharp refining knife. Make a flat cut from bottom to top and lift off the eye along with an elongated piece of bark and a flat wood chip. Then loosen the wood chips on the back of the bark. The fork-like opening at the level of the eye shows that it is still on the bark.
Clean the base and cut in a T-shape (left) and push the eye into the pocket (right)
Using the knife, you now perform the so-called T-cut - a longitudinal incision approximately two centimeters long parallel to the shoot and a slightly shorter cross-section at the upper end. First, the pad must be cleaned if necessary. In the case of noble and bed roses, the incision is made at the root neck, with a high-stem rose at a height of about one meter. Then use the knife blade or bark remover of the oozing knife to remove the two lateral bark lobes from the wood and fold them up gently. Then push the prepared eye of the noble variety into the resulting bag and cut off the protruding bark piece above the T-cut. Be sure to pay attention to the correct direction of growth when inserting - eyes placed in the wrong direction do not grow.
Use a rubber band to connect the finishing point (left). The next spring should show a fresh bud (right)
The upward-pointing petiole falls off after a few weeks, as does the rubber band, with which the finishing station is subsequently connected. Even better is a so-called Okulier-Schnell-Verschluss (OSV), which covers the place completely. In winter you should protect the finish well from frost. If a fresh red bud shows up next spring, the okulation is a success. As soon as the shoot is five to ten centimeters long, the shoot of the pad above the finishing station is cut off. Also remove all wild drives.
The shoot is shortened by half (left), so that the rose branches well (right)
If the young shoot is 10 to 15 centimeters long, you should pinch it, so shorten about half, so that the new rose from the beginning well branched and you can enjoy many flowers. Tip: Choose the best bushy or overhanging varieties for finishing tall trees.
For lay people much easier is the cuttings propagation of roses. Although it does not work so well on some bedding and red roses, the growth results are quite acceptable for shrub roses, climbing roses, rambler roses and above all groundcover roses.
The right oozing knife
As varied as the activities in gardening are, so are the models of the respective knives. There are simple flower knives, nursery knives, hooks and various forms of special knives for finishing work such as grafting and grafting. For all those who want to try the art of refining roses or fruit trees, the well-known Swiss brand Victorinox offers a reasonably priced combined oceling and garden knife. In addition to the two blades, it has a bark remover made of brass.