It is impossible to grow a vine in Russian conditions without thorough shelter for the winter. Even representatives of winter-hardy varieties are not protected from the negative effects of negative temperatures and can die in severe frosts. Therefore, it is useful for every gardener to know how and at what temperature to cover the grapes in order to prevent them from freezing.
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Preparation for wintering
Preparatory work before the onset of cold weather is an important stage in the care of the vine. Depending on the regional characteristics and preferences of the variety, they may differ. Therefore, only after receiving complete information about the variety of grapes can you form an action plan to prepare the culture for the cold weather.
Taking into account the ability to withstand the negative effects of frost, grape varieties are divided into the following groups:
- With minimal cold resistance - they are afraid of temperatures below -10 ° C.
- With a slight frost resistance - they are able to withstand frosts down to -17 ° C while maintaining all the eyes.
- Medium-hardy - they tolerate winter with frosts down to -21 ° C.
- Cold-resistant - not afraid of lowering the air temperature to -28 ° C.
The specificity of the preparatory work is determined by the varietal characteristics of the vine. It is important to bear in mind that the root system of the culture is sensitive to cold weather, and adult specimens cope better with a sharp cold snap than young seedlings.
For regions with harsh climatic conditions, shelter for the winter is becoming a mandatory procedure. In such an area, the air temperature can drop below -30 ° C. Therefore, if you do not protect the vine from the cold, it may die. Vineyards that grow on the sands need special attention, as they are more exposed to freezing.
Optimum temperature for shelter
Winter hardiness refers to the resistance of grapes to adverse weather conditions in winter. Frost resistance determines the reaction of the culture to negative temperatures. To improve winter hardiness, in August, you should get rid of some of the stepsons and wait until the vine is fully ripe.
When choosing the timing and temperature at which the vine will be sheltered, it is necessary to take into account the regional and weather characteristics in the region. If in your area winters are mild, and the climate is relatively warm, then only heat-loving varieties will have to be sheltered. In mid-latitudes, procedures have been carried out since early November.
The average daily temperature should be -5… -8 ° C. In such a situation, the grapes begin to shed their leaves, and the nutrients along with the water go deep to the root system. It is not recommended to shelter ahead of schedule, as sudden warming can lead to the awakening of the culture.
Do you shelter grapes for the winter?
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Read about watering grapes in the summer in the following article:Watering grapes in summer is the key to a good harvest in autumn