| Fertilizer Here at the Concord Group Retail Center we offer a wide range of Fertilizer for residential use as well as high end commercial products associated with our Intergrated Pest Management Program. 
Why Do Plants Need Fertilizer? Eighteen elements are considered essential for plant growth. Carbon, hydrogen, and oxygen are primarily supplied by air and water. Plant roots absorb the remaining 15 elements from the surrounding soil. These elements are divided into three groups based on their relative abundance in plants: Primary Nutrients (or Major Nutrients), Secondary Nutrients (or Minor Nutrients), and Trace Nutrients (or Micronutrients). Although the Major Nutrients are needed in the greatest quantities, a deficiency of any one nutrient can prevent plant growth, or reduce it to unsatisfactory levels. Even though some soils may already contain these nutrients, they may not be in a form available for plant growth. The best way to ensure that all of the nutrients are available in the soil is through regular applications of plant foods. Table 1 provides more information on each nutrient, its deficiency symptoms, and possible plant foods to cure the deficiency.
| PrimaryNutrients | Function | Deficiency Symptoms | *Solutions | Nitrogen | Vigorous growth & dark green color | Light green leaves; stunted growth | Dried Blood, Garden Manure, Cottonseed Meal, Ammonium Sulfate, Urea | Phosphorus | Root development & flowering | Smaller yields of seeds & fruit; purplish leaves, stems & branches; | Rock Phosphate, Bone Meal, Single Superphosphate, Triple Superphosphate | Potassium | Overall hardiness & disease resistance | Reduced yields; Spotted or curled leaves; Weak root system | Sulfate of Potash, Sulfate of Potash Magnesia, Muriate of Potash, Greensand |
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