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Raspberries are one of the most delicious garden berries. Analyzing the modern assortment of this berry, we can conclude that some ordinary varieties provide the bulk of the harvest.
But now varieties that bear fruit both in summer and autumn are gaining more and more popularity. They are called remontant. Although in some countries such raspberries are called re-bearing or continuously bearing. Let's try to figure out how the cultivation of remontant raspberries differs from the cultivation of conventional varieties.
- Raspberry remontant
- Agrotechnology for growing remontant raspberries in a two-year and one-year cycle
- How to plant and grow remontant raspberries
Raspberry remontant is grown by amateur gardeners, most likely, as an addition to the main varieties. Breeding work on obtaining remontant varieties began two centuries ago. In domestic breeding, work on the breeding of raspberries, which gives a second crop, was led by I.V. Michurin. He got raspberries, which gave a small harvest of berries at the ends of the shoots of the current year.
In addition, it was possible to get a re-harvest only during a long warm autumn.
At the same time, more than two dozen remontant varieties of raspberries were bred abroad. As it turned out, almost all of them were not suitable for growing on the territory of Russia. Only in the southern regions was it possible to achieve full ripening of the second crop.
Systematic work on the breeding of remontant varieties began about half a century ago. The main role was assigned to the Bryansk professor I.V. Kazakov. For parental forms, the professor took not only varieties of American selection, but also varieties of red and black raspberries, princes and other varieties of this culture. The result of the work was the varieties of remontant raspberries, which began to give a second harvest at the end of August and were bearing fruit until the October frosts.
It should be noted that one of the first domestic varieties, Indian Summer, gave a second harvest only in the south, however, in the subtropical climate of Sochi, the berries ripened until December. The cultivation of remontant raspberries, although it has a similarity to the cultivation of ordinary varieties, nevertheless, the cultivation technique of cultivation differs from the usual agrotechnology in several main points.
Agrotechnology for growing remontant raspberries in a two-year and one-year cycle
While working on varieties I.V. Kazakov noted that a full-fledged autumn harvest could only be harvested in a warm autumn. The first harvest of raspberries was tied on the shoots of last year at the usual time for raspberries. The second crop was provided by the tops of the shoots that grew in the current season. Thus, two harvests could be obtained. For cultivation in a two-year cycle, the varieties Zhuravlik, Zhar - a bird are suitable. The autumn harvest is much less than the summer harvest and it is possible only with a favorable climate and good weather. However, such conditions are not always the case.
Therefore, the traditional cultivation methods had to be revised and the remontant raspberry was grown using a completely different technology as an annual crop. Were obtained varieties that form a full harvest once a season on the shoots of the current summer. Their shoots did not experience adverse effects in the late autumn and winter periods, so the berries retained their presentation, they were almost not damaged by pests. As soon as the shoots yielded, with the onset of frost, they were completely cut off above ground level.
Repaired raspberry on video, its features:
In the spring, from the roots, raspberries again form new shoots of the current year. By the second half of summer, flowers and berries are formed on them. Fruiting continues until frost. As soon as the soil begins to freeze, the ground part of the shoots is cut off again. With this agricultural technique, the harvest is formed once from the end of August and the entire warm period of autumn continues.
Considering that there are no ground shoots in winter, it is also possible to get rid of the main pests and diseases. Raspberries, when grown for one year, usually have time to complete their full development cycle in one season. Every year, remontant raspberries yield a crop only on shoots that grow back in the spring and are completely cut out in the fall.
After pruning, all cut shoots are removed from the site. For growing raspberries in a one-year cycle, the following varieties are suitable:
- Chief Marshal
- Red Guard
- White Guard
All varieties are distinguished by the fact that in a temperate climate they manage to yield the harvest in the amount that is provided for by the characteristics of the variety. Perhaps, in the near future, the one-year method of growing remontant raspberries will become the main one, since it allows the plant to display varietal qualities more fully and get a crop in the right quantity and quality. It is better to harvest one full-fledged harvest of berries than to have a not very large summer harvest and not every year to get an autumn one in unfavorable weather conditions from a bush weakened by summer fruiting.
How to plant and grow remontant raspberries
Receiving planting material from remontant raspberries is much slower than from ordinary garden varieties. This is primarily due to the limited amount of root growth. To increase its amount, in the spring of the second year after planting, the central part of the roots is carefully dug out. The radius of the removed part is about 15 cm. This part is deposited in a new place. After this procedure, many roots of various sizes will remain in the ground. About 20 new root suckers will go from them.
They can also be replanted as they grow. It is important to remember that the growth of shoots is uneven and can last all summer. The second way to obtain planting material is propagation by green cuttings.
This method has received another name for reproduction "nettles". This is due to the fact that the rosette of leaves, which appears on the surface of the earth in early spring, resembles a young nettle. It is necessary to cut off the "nettles" together with the clarified underground part. The cut off shoot will not have its own roots, but it must be removed along with a small clod of earth. After being removed from the ground, the green cuttings are transplanted into a greenhouse.
It is better to dilute the soil in the greenhouse with river sand and peat. The planting depth should not exceed the depth at which the cutting grew before. In such a mixture, "nettles" will give roots in about 21 to 25 days. It is important not to dry out and overheat. After rooting, you can start hardening the seedlings and only then transplant them to a permanent place.
Planting and leaving
For planting remontant raspberries, light loams with a slightly acidic reaction are suitable. The earth is well filled with compost and humus. In addition, add up to 100 g of superphosphate and up to 50 g of potassium sulfate. Everything is mixed with the soil and only after that they begin to plant remontant raspberries. Planting time is autumn or spring. It is not bad to plant the berry not in planting holes or furrows, but in high ridges, this will speed up the appearance of the crop.
Throughout the season, it is important not to allow the soil to dry out, but stagnant moisture is also undesirable. Timely removal of weeds and loosening of the soil is also necessary. In many ways, caring for remontant raspberries grown in a one-year cycle is easier, since the ground parts are simply removed for the winter. If summer shoots are still left to winter, then they need to be bent to the ground and covered with the onset of cold weather. The technology of growing remontant raspberries, although different from the cultivation of ordinary varieties, can be mastered by any gardener.