Compare Fertilizers
- 1). Decide whether you want to use an organic fertilizer or a synthetic fertilizer. Organic fertilizers are made from plant or animal by-products, such as manure, compost or corn gluten. Organic fertilizers cost more than synthetics but break down more slowly in the soil. They may contain micronutrients, as well. Synthetic fertilizers are manufactured, and generally contain only nitrogen, phosphorus and potassium, according to Clemson University. They are less expensive, but may require application. Additionally, they are more likely to burn plants and pollute groundwater.
- 2). Read the fertilizer label for a nutrient analysis. Examine the label to ascertain how many square feet the fertilizer will cover. A fertilizer with higher amounts of nutrients may cost more, but usually goes further. If you've conducted a soil test or know your soil lacks nutrients, choose a fertilizer that addresses your soil's needs. For example, alkaline soils bind up iron, so gardeners may choose to use a fertilizer that contains chelated iron.
- 3). Read the label to determine what the mode of application is. Each application type is appropriate for specific gardening situations. Granular fertilizers are broadcast directly onto the soil, making them a good choice for large garden areas or lawns. Pellets are inserted in the soil; use them for houseplants or container plants. Foliar sprays are sprayed directly on leaves to solve specific problems such as iron deficiencies. Water-soluble fertilizers are diluted in water and applied to plants. They are expensive, but provide quick nutrient uptake to nutrient-deprived plants.
