Plants need macronutrients (nitrogen, phosphorous, and potassium, which most plants use in large quantities), secondary nutrients (calcium, magnesium, and sulfur) and micronutrients (iron, magnesium, zinc, boron, and others). Soils vary in their natural fertility, so you may need to add nutrients if your plants need more than what your soil has to give. Nutrient deficiencies lead to slow growth, increased susceptibility to pests and diseases, and symptoms such as chlorosis (yellowing of leaf tissue).
Organic fertilizers come from plant and animal sources such as manure, kelp, blood, feathers, cottonseed, and alfalfa; they nourish the soil food web. Chemical fertilizers are made from fossil fuels and mineral salts; they deplete nonrenewable resources, kill the life in the soil, burn plants if applied too generously, and leach into ground and surface water.
Organic fertilizers are better for plants and soil because they're gentler, slower-acting, come from natural renewable sources, are low in salt content, don't leach into groundwater, and work in harmony with microorganisms to improve the soil. In fact, organic fertilizers need soil organisms to convert their nutrients to forms your plants can use.
The occasional (2 or 3 times per year) application of a good-quality organic fertilizer is adequate for most kinds of plants. Fertilize plants with special needs (such as acid-loving species or fruit trees) with specially-formulated organic fertilizers.
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How would you like to save a ton of money and increase the value of your home by as much as thirty percent! If your homes landscape is designed properly it will be a source of enjoyment for your entire family, it will enhance your community and add to the resale value of your property. Landscape design involves much more than placing trees, shrubs and other plants on the property. It is an art which deals with conscious arrangement or organization of outdoor space for human satisfaction and enjoyment.