Unless your soil is perfectly balance and rich in nutrients you need to fertilize periodically. How much and when depends on your soil and climate. All fertilizers have a row of numbers listed on, them some with a letter in front of each. These letters are symbols for the nutrient content of that particular fertilizer.

N is always first on the list. This is for nitrogen. Nitrogen helps keep plants green. It helps the plants produce and maintain chlorophyll, which they need in abundance to take up nutrients. If you are wanting lush green growth look for a high number in More >