Cabbage, lettuce and brussels sprouts There is some evidence that plants like lettuce are more likely to experience tipburn (burned edges of leaves) if they're experiencing a deficiency of calcium.[7][8] Carrot 'Cavity spot' – oval spots develop into craters which may be invaded by other disease-causing organisms.[9] Celery Stunted growth, central leaves stunted. Tomatoes and peppers 'Blossom end rot' – Symptoms start as sunken, dry decaying areas at the blossom end of the fruit, furthest away from the stem, not all fruit on a truss is necessarily affected. Sometimes rapid growth from high-nitrogen fertilizers may exacerbate blossom end rot.