I wish to caution people in general to get a soil test before adding Calcium or a source of Calcium (e.g. gypsum) to a soil. For example, here in metropolitan areas of San Diego there is a lot of Calcium in the various soils. Too much Calcium can also be a problem.
On the other hand, having trace amounts of Calcium in a water-soluble fertilizer is generally a good thing. That's why I put it in the
Fruit Fuel fertilizer I designed. (warning: shameless advertising!)
