Celery is a commonly grown and commonly purchased vegetable. But in the process of planting, problems are often encountered. These issues have been explored in this report about a demonstration trial conducted by the RLF Tech Team. Many growers only pay attention to the application of nitrogen, phosphorus and potassium compound fertilisers, and ignore the plant’s need for a properly balanced ratio of trace elements. This demonstration trial in Xiaoshan District of Zhejiang Province can be viewed here.