Many summer residents consider this action to be a trick, while experienced gardeners call it extra work.
Snow in a greenhouse is sometimes beneficial, but sometimes it leads to undesirable results.
During the cold season, the soil in the greenhouse freezes more strongly, because it is not covered. Therefore, it makes sense to fill the greenhouse with snow at the beginning of winter.
In early spring, the cover will melt and stimulate biological processes. The soil will be filled with moisture, and will not be dry, as is usually the case after winter.
Some summer residents throw snow into the greenhouse at the end of winter so that it melts faster and moistens the soil.
But this approach is wrong. Every centimeter of snow reduces the soil temperature by 1 °C. For example, the air temperature is +15 °C. There is a 10-centimeter layer of snow in the greenhouse. The soil temperature is +5 °C, and in the greenhouse itself it is still +15 °C.
This way, the soil will take longer to warm up. Accordingly, optimal conditions for planting will form later. Therefore, it is better to throw snow into the greenhouse at the beginning of winter, rather than in early spring.