Nitrogen Lawn Fertilizers

Nitrogen lawn fertilizers help grass grow thick and green by supplying a nutrient that supports leaf growth and chlorophyll production. Whether you’re tending a small front yard or a broad stretch of lawn around the farmhouse, choosing the right nitrogen fertilizer starts with knowing your grass type and what your soil needs. The three numbers on a lawn fertilizer label show the percentages of nitrogen, phosphate and potash, in that order, so the first number tells you how much nitrogen the fertilizer contains by weight. A higher first number means more nitrogen per pound of fertilizer, not necessarily a better fit for your yard. Your local Cooperative Extension office can help you interpret a soil test and plan nitrogen applications for your region and turfgrass. Slow-release nitrogen fertilizers deliver nutrients gradually, while quick-release nitrogen fertilizers make nutrients available sooner. The right approach depends on the season, your lawn’s growth pattern and how much feeding it needs. For the best results from nitrogen lawn fertilizer, feed grass during its active growing season and follow the label’s application rate. Cool-season grasses, such as tall fescue and Kentucky bluegrass, generally benefit most from fall feeding, while warm-season grasses, including bermudagrass and zoysiagrass, typically need nitrogen after spring green-up and during active summer growth. Local recommendations can help you fine-tune that schedule for your climate. Measure your lawn before applying fertilizer, adjust your spreader to the label directions and spread evenly to help prevent streaks or fertilizer burn. More nitrogen is not always better: too much can push excessive leaf growth, increase mowing needs and contribute to nutrient runoff. Avoid fertilizing dormant or drought-stressed turf, keep fertilizer off driveways and sidewalks, and skip applications before heavy rain. Follow the label’s watering directions, since some nitrogen lawn fertilizers need irrigation after application to move nutrients into the soil. Paired with proper mowing and watering, a well-timed lawn feeding plan can support a thicker stand of grass that helps crowd out weeds.