1, leeks and lettuce are faster, and they can be harvested for many years once planted.

2, lettuce, suitable for planting in early summer, the temperature of seed germination is about 20 degrees Celsius.

3. Chrysanthemum can be harvested after planting in summer 1 month.

Radish belongs to the type of ready-to-eat lettuce, which is suitable for sowing in August.