Do onions grow after the first frost?

Frost can't raise onions first, and the longer it grows, the more empty it becomes. It means that farmers who grow onions in winter will harvest onions before the first frost solar term, because after the first frost solar term, the temperature will be lower and lower, the onions can't continue to grow, and they will become hollow because of the lower temperature, which not only affects the quality and yield of onions, but also is not conducive to the winter storage of onions.

Friends who often buy vegetables know that people usually choose long green onions when they buy them in winter, because the leaves of green onions will dry up after losing water and can't be eaten any more. Green onions are very resistant to storage, and they are still fresh even after a long winter.

The reason why the green onions should be harvested before the first frost is that after the temperature drops in the first frost, the green onions will stop growing and begin to transport nutrients to the roots to prepare for the winter, and the green onions will start to soften because of the loss of nutrients. Therefore, in order to prevent the scallion from softening, it should be picked before the temperature of the first frost drops.