Spring frost

Proposition of probability
When should I expect freezers? Some amateur grapes define them in several signs.
Since the appearance of swollen and blossomed eyes in the lunar calendar or on the moon, it is necessary to determine the days of full moon and new moon. Frosts can be mainly 2-4 days before the new moon, on the day of New Moon and in the next 2 days (if at this time a long-term northern or northeastern cold cyclone has occurred, then more than 2 days). Frosts are usually at atmospheric pressure over 755 mm mercury pillars.
Very rarely, there are no frost during the new moon.
Full moon freezes are rare, but if the wind blows from the north or northeast in the afternoon, and by night he subsides and visible many stars in the sky - you should expect frosts.
Doodles for the grapes of frost during the new moon and full moon in the middle band of Russia are usually afraid of the second half of April and the first half of May and are likely before the beginning of June. The lowest temperature is in the clock before sunrise. In cloudy and rainy weather, the probability of frosts is minimal.
Another easy-to-use, but accurate method for determining the possibility of frosts is the method of P.I.

Brownova. The air temperature is measured in the afternoon at 13 o'clock and in the evening at 21 o'clock, the readings are recorded, after which the difference is calculated between the first and second testimony. The results obtained are transferred to the chart (see Fig.): Along the horizontal scale, we mark the difference in temperatures, and on the vertical scale the temperature of the air at 21 o'clock. At the point of intersection of two lines, we determine the possibility of frosts. For example, the air temperature of at 13 o'clock was + 15 ° C, and at 21 hours was + 4.5 ° C. The temperature difference is 10.5 ° C. We transfer the calculation data to the chart. The lines intersection point indicates the percentage probability of freezing.

Ways to protect
There are many ways to protect grape bushes from frost.
Firstly, it is the shelter of the bushes of rags that entered the Earth, mats from a cantham, hay or straw, various nonwoven underfloor materials (Agrille, Pegasus, Loutrasil, Spanbone-House, etc.). Non-woven materials can be covered and planting strawberries and vegetables, the pinch of the edge of the material to the ground and sprinkled with their soil. These materials are sufficiently easy to not interfer and do not break the gentle small bushes.
Secondly, placing plants under the arcs of small height with long (until the constant positive night air temperature) is placed on top of the same nonwoven underfloor materials. This method not only protects plants from frosts, but also contributes to an earlier maturation.
Third, smoking. For smoking on the site, sawdust, topper, straw manure, etc., inside which are put on a straw, chips, dry leaves or cheese for fast ignition. Steaming heaps should be placed from a leeward side. The ground can be renewed on them. It is necessary to respect security measures and prevent fire.
Fourth, you can apply watering with water in the aisle. Evaporation of water during frosts saves plants. Frosts are often found in the breakdown, I have radial fans in the workshop, only they are not afraid of bad weather.
Fifth, protects fruit and vegetable from frost spraying with integrated installations and automatic spraying systems.
Finally, the spring spraying of garden strawberries, berry and grape bushes with a solution of iron mood (according to the instructions) can delay the process of dissolving flower kidney (and in grapes - eyes), and thus it is possible to get away from frosts.