In order to have a beautiful lawn, provide adequate food, protection, and water, and keep it well manicured! Fertilizers are the primary source of supplying a lawn with its first two basic needs.

It's necessary to use fertilizer before any problems are obvious. Once disease, weeds or insects are noticeable; the lawn's health has already been seriously compromised. Even without these annoyances, lawns need fertilizer to grow; if they don't get it, blades will turn yellow, thin, and fail to thrive. Grass then becomes susceptible to any number of unattractive and unhealthy conditions. Lawns need fertilizers just as much as humans need food!

Many factors play a part in determining which fertilizer is best. All grass requires more fertilizer during its growing seasons, but some fertilizers should not be used during rainy periods, such as those with a high nitrogen level and no time-release mechanism. If the lawn owner will not be able to keep up his fertilization schedule of every 2 weeks or so due to personal scheduling, that will also determine the kind of fertilizer timing that may be needed. (Slower-acting fertilizers only need to be applied about every 6-8 weeks, but are usually more expensive.) The lawn owner should even consider whether sprayer or spreader application would be most effective for his physical limitations and size of lawn. (It may be confusing to determine the varying amounts needed for liquid instead of granular fertilizers, and using liquid fertilizers with sprayers may be logistically difficult for those with very large lawn areas. But, it does prevent the homeowners from having to store large bags of granular fertilizer and purchase, then store, a spreader.)

Most fertilizers use a mixture of approximately 30% nutrients (stated as a series of 3 numbers on the product bag) and 70% "fillers" or chemical agents. Lawn owners should have an idea of what type of grass his lawn contains and how large the square footage is before purchasing any type of fertilizer. Fertilizer requirement is based on a calculation of one pound of nitrogen per 1,000 square feet of grass for "average" Centipede grass.

The amount of nitrogen chemicals, which encourage the green color, is the first of the first 3 fertilizer numbers on the product bag, such as 29 in the series 29-3-4. To figure out how many bags to buy, divide the first number, 29 by 100; the result is 3.5 pounds for every 1000 square feet of grass. Once the amount to be applied has been reached, application should stop, and any remaining fertilizer stored for future use. This is important to remember, because just as too little fertilizer will keep a lawn from growing into a lush and thick green carpet, too much fertilizer will burn and kill it. (It's also good to remember that applying fertilizer with higher nitrogen levels too frequently can cause grass to grow more quickly and need additional mowing!)

Using the above calculation, some grasses will require more than one pound per 1000 square feet: Buffalo and Blue Gramma may need up to 2 pounds, fine Fescue, Bahia, St. Augustine, Ryegrass, Zoysia should have 2 to 4 pounds, and Bermuda, Kentucky, Bentgrass, and tall Fescue must be given 3 to 6 pounds. (All of these estimates can be based on the lower range for cooler temperature areas and shorter growing seasons.)

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