Pea is a semi-hardy crop, which likes mild and humid climate. Generally, it cannot be planted in a sub-zero temperature environment. Pea is an annual climbing herb in Leguminosae, with a plant height of about 0.5-2 meters, and the whole plant is green. Pea seedlings have strong cold tolerance, and the suitable temperature for seedling stage is 15-20℃. Pea is a thermophilic crop, and the relative humidity of air should be kept at about 75% and the relative water content of soil should be kept at about 70% during its growth, which is beneficial to plant growth.

1. How many degrees below zero can you grow peas?

1, peas are semi-cold-tolerant crops, like mild and humid climate, not resistant to dry heat, and generally can not be planted in sub-zero temperature environment. The cold tolerance of round pea is stronger than that of wrinkled pea, and the initial temperature of seed germination is relatively low, which is 1-2℃ for round pea and 3-5℃ for wrinkled pea, and the seed germination is relatively slow at low temperature.

2. Pea is an annual climbing herb in Leguminosae, with a plant height of about 0.5-2m. The whole plant is green, smooth and hairless, and covered with frost. Pea seedlings have strong cold tolerance, the suitable temperature for seedling stage is 15-20℃, the lowest temperature for flowering is 8- 12℃, and the suitable temperature for flowering and pod setting is 15- 18℃.

3. Most pea varieties are long-day crops. When introduced from the north to the south, early and middle-maturing varieties should be introduced, and late-maturing varieties should not be introduced, while southern varieties introduced to the north can blossom and bear fruit early.

4. Peas are warm crops, and their drought resistance is not as good as other vegetables such as kidney beans. During the growing period, the relative humidity of air is kept at about 75%, and the relative water content of soil is controlled at about 70%, which is beneficial to plant growth.

Second, pea planting technology and management

1. Peas don't need much loam. As long as the soil layer is deep and the salt content is low, peas can be planted. Such soil is beneficial to the survival of seedlings and the growth of crops.

2. Choose suitable pea varieties according to local conditions, and use shallow loose soil after sowing to keep the soil soft, which is beneficial to the growth of plant roots and the growth of seedlings will become more robust.

Peas should be planted in spring. The southern region can choose from late February to early March, and the northern region can choose from April to May. The growth period of spring sowing is relatively short, and the harvest time will be advanced. Early-maturing varieties are usually sown in autumn, almost in early September.

4. Before flowering, water the peas with small water to catch up with the available nitrogen fertilizer, and then loosen the soil to conserve moisture, which can accelerate the growth of plants and promote technology. When the stem begins to bear pods, it is necessary to increase the watering amount and apply phosphorus and potassium fertilizer appropriately. At the peak of pod setting, the soil should be kept moist frequently to ensure the water needed for pod setting development. At the late stage of pod setting, the bean seedlings are closed, so watering should be reduced.