There are seventeen elements that are essential for plant growth, including nitrogen, phosphorus and potassium, each of which the plant needs in larger quantities. Some, however, are needed in small quantities and are referred to as “micronutrients.” This does not diminish their importance since zinc, manganese, iron, and magnesium are critical for robust growth and color. The right balance of micronutrients, provided in a reacted form for ready plant uptake is paramount. Macro Micro is the answer.