Most gardeners are familiar with the "N.K.P" in commercial fertilizers: Nitrogen (N), Phosphorus (P), and Potassium (K). But these three represent only half of the major nutrients a plant requires in relatively large amounts. The other major nutrients are sulfur, calcium, and magnesium, all are necessary for the kind of strong, healthy growth that results in bountiful crops and beautiful ornamentals.
Minor nutrients are not really "minor," or unimportant. They are essential--vital to plant growth but needed in lesser amounts than "major" nutrients. Essential minor nutrients are the "secret weapons" of successful gardeners and farmers. But despite the critical importance of minor nutrients, most fertilizers do not include them. (By contrast, our all-natural Perfect Balance™ custom fertilizer restores five minor nutrients to effective levels.) Plants, however, like people, can suffer from too much of a good thing. In humans, vitamin D, necessary for health, can cause disease or even death when too much is consumed. Similarly, too much boron can be toxic to a plant. A soil test will help determine which micronutrients are already abundant, and which ones your soil needs to achieve perfect balance.