In which month can't Toona sinensis be eaten?

1, Toona sinensis cannot be eaten after April.

2. Toona sinensis buds grow very fast, so its edible time is very short. Generally, it varies according to the temperature and climate in different regions, but it is usually eaten around Grain Rain, that is, in mid-April. After mid-April, the contents of nitrate and nitrite in Toona sinensis buds in most areas have exceeded the international standards, which has a great impact on human health.