When is the right time to sow in spring?

Sowing date is closely related to crop species and local climate.

First of all, the variety of crops determines the suitable temperature range of a crop, and the whole growing period of crops should be within the temperature range that can grow. Specifically, not only the temperature of seed germination and emergence should be considered when sowing, but also the freezing injury at harvest should be ensured.

Secondly, the local climate determines the sowing date. Spring sowing crop varieties should consider not only the germination conditions of seeds, but also the accumulated temperature required in the growth period, and try to avoid the high incidence of pests and diseases and comprehensively judge the sowing date.

Extended data:

Qingming-means sunny weather, fresh air, gradual warming and lush vegetation. The Gregorian calendar is Qingming around April 5 every year. ?

Grain Rain-More rain is good for the growth of cereal crops. Grain Rain is around April 20th of the Gregorian calendar every year.

Xiaoman-refers to the seeds of summer crops that are full, but not yet mature, just small and not yet full. Every year on May 2 1 day of the Gregorian calendar, it is full.

Vegetable varieties suitable for open cultivation in spring mainly include:

1, onion. Seedlings are cultivated in the first half of March, not cut in spring, planted in the ground after wheat harvest, and harvested in the first frost.

2, small arch shed or plastic film west, melon. Seedling raising in Xunyang boundary in mid-March, planting in small arch shed in early April or on plastic film after April 20. From late April to early May, cotton was planted as needed and intercropped with cotton and melon.

3. Eggplant (eggplant, pepper, tomato) was planted in the middle of Xunyang border in March, planted in the open field in late April, and harvested after wheat harvest.

4. In early spring, zucchini can be raised in early or middle March, or directly covered with plastic film in April 10, with a yield per mu 1500 plants, before the wheat harvest.

References:

Sowing-Baidu Encyclopedia