The reason why celery should be eaten after picking leaves is because celery leaves have a bad taste and bitter taste. After cooking with celery stems, celery leaves are easy to get old, and it will also affect the taste of dishes, making it difficult to swallow.

The root system of celery is shallow, generally distributed in 7 ~ 36 cm soil layer, but most root groups are distributed in 7 ~1cm topsoil layer. Because of the shallow distribution of roots, celery is not drought-tolerant. The main root system of direct seeding celery is developed, and the transplanted celery is suitable for seedling transplanting or soilless culture because the main root is cut off and the lateral root is developed.