April is spring. At this time, the recommended vegetables are lettuce, tender peas, lettuce, fennel, Chinese cabbage, cowhide, celery, spinach, Chinese toon and so on. Among them, lettuce grows well in April and is not prone to pests and diseases. So it is a very good choice to buy food at this time. In addition, cowhide will bloom and get old after April, so it is best to buy it in April.