A fertilizer is any material that provides nutrients to plants. They can be classified as Organic, Chemical, Inorganic, and Soil Amendment. They contain macronutrients and micronutrients that plants need for optimum health and growth. The percentage of elements in a container of fertilizer that are immediately available, are usually expressed as the NPK(nitrogen-phosphorus-potassium) The remainder of the material in the fertilizer container consists of filler or other elements in the compounds with the nitrogen, phosphorous and potassium that are not immediately available to plants.
Nitrogen is a macronutrient that is a major component of plant cells and a component of chlorophyll. Nitrogen deficiency symptoms include lower leaves that turn yellow, a plant that is yellowish or pale green overall, and stunted growth.
Phosphorus is a macronutrient that is a major component of genetic material in plants and is used in various biochemical processes. Plants that are deficient in phosphorus have red, purple, or very dark green leaves and stunted growth.
Potassium, potash is a macro nutrient that is found in plant proteins, carbohydrates, and chlorophyll. Plants that are deficient in potassium are weak-stemmed and develop lower leaves that have yellowish tips and edges that eventually turn brown.
TREE, SHRUB AND PLANT FERTILIZERS
Miracle-Gro in dry sprinkle, water soluble and liquid concentrate forms are available for application to your plants, vegetables, trees, shrubs and lawn.
Plant-prod is available in various applications as an All Purpose fertilizer for a variety of plants, trees, shrubs, lawns, outdoor and indoor plants with a 20-20-20 ratio. This brand of fertilizer also boasts an excellent Plant Starter format with a high % of Phosphorus. If you want to see large blooms on your plant, then be sure to look for the Flowering Plant fertilizer in this brand.
Root-Feeder comes in a couple of different formulas: For your beautiful EVERGREENS use the ACID LOVING PLANT FORMULA and follow package directions for depth probe for YOUNG or ESTABLISHED TREE or SHRUB. For your other types of trees and shrubs use the HIGH NITROGEN FORMULA .
JOBES provides fertilizer spikes for feeding trees and shrubs up to 60 days with 5 spikes feeding a tree up to a 3″ diameter trunk with a higher NITROGEN content. When you are fertilizing your Fruit Tree you will want to use a higher PHOSPHORUS and POTASSIUM ratio. These fertilizer spikes deliver a slow release of these macronutrients into the soil.