1. There are many vegetables suitable for planting in spring, including coriander, lettuce, Chinese cabbage, peas, chrysanthemum, pepper, shallots, rape and leeks. However, vegetables are planted early and late in spring, because the temperature is low in the early spring and the climate is changeable, and the temperature gradually rises and tends to be stable in the later spring. Therefore, planting vegetables in spring is suitable for sowing lettuce and leek in the early stage. The reason why this vegetable should be planted early is because the growth period is short, and it will not delay the planting of the next crop after harvest.

2. Summer is mainly suitable for planting some heat-resistant vegetables, such as fruits, beans, eggplant, cabbage, water spinach and so on. The biggest feature of these vegetables is heat resistance, which requires a long light time, but they are not resistant to low temperature and have a long growth period. They can be planted in spring and summer, and summer is also a good season for transplanting vegetables.

There are many vegetables that can be planted in autumn, such as Chinese cabbage, radish, carrot, mustard, cauliflower, coriander and so on. However, the planting time in autumn is more particular, such as Chinese cabbage, radish and other vegetables, which are prone to serious diseases if sown too early, and the growing period is not enough if sown too late, so it is necessary to plant vegetables in autumn according to local conditions and planting habits. Furthermore, some vegetables, such as Chinese cabbage and radish, taste better than those planted in spring and summer after late low temperature, especially after frost.

In winter, except for some vegetables in the south, they can't be planted in the open field in the north. If it is a vegetable greenhouse, all vegetables can be planted as long as they reach the temperature.