Celery requires high nutrient and environmental conditions from transplanting to the heart leaf growth stage, making it prone to slow recovery, yellowing leaves, uneven growth, and under stress, wilting and root rot. From petiole swelling to maturity, it has high demands for potassium, calcium, and boron, which can lead to thin petioles, hollow stems, coarse fibres, uneven plant sizes, and pre-harvest cracking, affecting yield and quality.