Calcium also does nothing for tomatoes, as far as setting the blossoms to insure fruit. However, the element calcium helps to prevent blossom end rot which sometimes occurs when the tomato begins to mature. Blossom end rot is a mushy rot on the stylar end of the mature tomato fruit. Many growers fertilize tomatoes with Calcium Nitrate, one of the few water soluble forms of calcium, to protect against blossom end rot. However, because the manufactures evidently has switched to cytokinins from gibberellic acid, cytokinins must be capable of setting the blossoms of tomatoes and peppers. I have never heard, nor read anything about cytokinins setting the blossoms of citrus. This does not mean that cytokinins will, or will not set citrus blossoms, I just don't know. Perhaps another member does. - Millet (1,024-)
