Is the growth period of winter spinach long or short? First, look at the spinach planted in the open air in winter. Take Gansu, a cold area in northwest China, as an example. In winter, spinach is usually sown from the middle of September in the solar calendar (around August 20 in the lunar calendar), and temperature regulation for three months in cold winter will speed up the growth period of spinach. The optimum temperature for spinach growth is 15-20℃. If the temperature can be kept within this range, its growth rate will be very fast, and then the growth period will be shortened.

The average growth period is 30-50 days. However, because it is a plant with strong cold tolerance, it can also grow through the winter in cold winter, so the growth cycle of spinach planted in late autumn and early winter is longer than that planted in spring, summer and early autumn. Spinach is extremely nutritious. In addition to iron, it has an auxiliary dietotherapy effect on people with iron deficiency anemia. It also contains folic acid, amino acids, carotene, zinc and lutein.

It's not cold in winter here, and the average temperature is above 10 degrees. Spinach is a cold-resistant vegetable. As long as the temperature is kept at about 10 to 15 degrees and the humidity is 85%, spinach seeds will germinate in five or six days. There are several varieties of spinach that can be planted according to different seasons. Different regions and climates make it impossible to grow spinach in winter.

In the plot where spinach is planted, the soil with sunny lee, loose and fertile soil, good drainage conditions and slightly acidic neutral soil should be selected. If it is continuous cropping, the site should be cleaned up in time after the previous planting. Spinach can be harvested when the plant grows to 65,438+00 cm, because regional differences and variety differences lead to different harvesting times. In the north, we should spend the winter safely and harvest in March next year. Spinach seedlings should be properly watered to prevent the soil from being too dry. Before the soil freezes, you should pour enough frozen water. When spinach grows to 4-5 leaves, it can be watered with frozen water once.