However, excessive rates of calcium at the expense of other cations can reduce fruit firmness and shelf life. For this reason it is important to keep calcium applications in balance with other cations such as potassium and magnesium.
Calcium also helps to reduce levels of mold on fruit post-harvest. This calcium can also be applied pre-harvest as a foliar application. Ca reduces albinism, maintaining fruit coloration through increasing anthocyanin levels during maturity.