Fertilizer helps grass grow and maintain a deep green color.
Lawns need specific growing conditions to thrive. Most lawns need full sun or light shade. Other factors include moist, well-draining soil with a high nutrient content. Lawn fertilizer encourages the healthy development of turf grass by adding these nutrients in deficient soil. Applying a high-quality fertilizer in the right amount and at the right time keeps a lawn looking its best throughout the growing season. Does this Spark an idea?
Timing
Lawns need fertilizing at least once per growing season. Some species need up to three applications every year. This rises to as many as five annual applications when using quick-release fertilizers. Fertilize high-maintenance lawns every other month, beginning in late May or June. Provide two fertilizer applications for low-maintenance types such as fescue, put on in August and October. These times vary somewhat depending on location. For example, early May, early September and late October work best in Iowa, according to Iowa State University Extension horticulturists. As a general rule, fertilize lightly in the spring, waiting until fall to provide large applications.
Types
Fertilizers come in both granular and liquid forms, as well as fast- and slow-release nitrogen types. Fast-release fertilizers green lawns up faster, but must be applied more frequently. Cheaper, water-soluble versions carry a higher risk of burning. Some homeowners choose organic versions of fertilizers, but these may not provide adequate levels of nitrogen, according to University of Illinois Extension horticulturists. They do present less risk of chemical burning, as opposed to synthetic fast-release types with high salt levels.
Application
Aiming for 1 lb. of nitrogen per 1,000 sq. ft. offers the best results in most circumstances. Applying by hand results in uneven coverage, so use a spreader if possible. Choose a cooler day with temperatures at 85 degrees Fahrenheit or lower to lessen the risk of chemical burns. Read label directions to determine manufacturer suggestions on watering after fertilizing the lawn, as best practices vary by brand.
Considerations
Taking a soil sample gives you detailed insight into the needs of your lawn, allowing you to choose optimal fertilizer types and schedules for best results. Leaving lawn clippings on high-maintenance grass such as Kentucky blue grass helps reduce the otherwise high level of fertilizer needed over the course of a growing season. This practice reduces fertilizer requirements by approximately 1 lb. per 1,000 sq. ft. per year, according to University of Minnesota Extension horticulturists.
Warning
Never pour fertilizer into the spreader while it sits on the lawn. Any fertilizer spills could severely damage the lawn. Instead, fill it on the sidewalk, driveway or better yet, in the garage.
Tags: Extension horticulturists, growing season, according University, best results, risk chemical