Micronutrients are just as Important

Even though most fertilizers contain only Nitrogen, Phosphorous and Potassium, the micronutrients are just as important for healthy plant growth, and lawn grass will show the affects of an imbalance, or too little of any of these nutrients. Calcium: Plants without enough calcium have thick, woody stems and poor root development. Lack of calcium can give the grass a yellowish hue. The ratio of calcium to magnesium must be 7:1 for proper plant growth. Magnesium: Chlorophyll is partially made of magnesium, and needs this nutrient to function. Too much Potassium in the soil can prevent magnesium from being present in the soil in a form that is available to plants. Sulfur: proteins have sulfur components in them. Peppers, onions, cherries and plums need plenty of sulfur to bloom and produce good fruit set. Many lawn grass fertilizers have a sulfur component. Iron: Iron uptake is affected by the amount and form of manganese. Iron can bond tightly with soil particles. Addition of a light layer of compost raked into the grass can re-introduce iron into lawns where it is deficient. Manganese: Plants require manganese to oxidize enzymes. Acid soils (lower pH) tend to make more manganese available than alkaline (high pH) soils. Copper: Copper is a catalyst for specific enzymes within plants. Many plant growth processes rely on sufficient copper. Zinc: Protein and starch building processes require zinc. Too much Phosphorous in a lawn can bind up Zinc and make it unavailable to plants. Boron: Flowering, fruit and seed formation are affected by boron.

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