10 Best High Nitrogen Lawn Fertilizer 2025 in the United States

Scotts Green Max Lawn Food is a high-nitrogen lawn fertilizer designed to provide rapid greening and improvement of your lawn. With a dual-action formula that includes a 5% iron supplement, it promises deep greening in just three days, making it an excellent choice for homeowners looking for quick results. This fertilizer is suitable for use on any grass type during spring, summer, or fall.

The product's granule form allows for easy application and even distribution across your lawn, covering up to 5,000 sq. ft. per 16.67 lb. bag. Additionally, it is safe to re-enter the lawn immediately after application, and it won't stain surrounding concrete or surfaces if used as directed. Those seeking a reliable, fast-acting lawn fertilizer with added iron will likely find Scotts Green Max Lawn Food to be a valuable option.

The Scotts Turf Builder Triple ActionI is a comprehensive lawn care product that combines weed control, crabgrass prevention, and fertilization in one formula. It offers a convenient solution for those looking to maintain a thick, green lawn while tackling common lawn issues like dandelions and crabgrass. This product is suitable for various grass types, including Kentucky Bluegrass, Bermudagrass, and Tall Fescue, which makes it versatile for different lawn environments.

The treatment covers 4,000 square feet, providing ample coverage for medium-sized lawns. The granules are easy to apply using a Scotts spreader and require watering in after 24 hours to activate the formula effectively. The recommended application is in early spring, aligning well with seasonal lawn care routines to target actively growing dandelions.

While it offers a balanced N-P-K ratio for feeding grass, it's essential to consider additional treatments if crabgrass is already present. Users looking for a straightforward, multipurpose lawn care solution will find this product beneficial, but those with severe crabgrass infestations or very specific nitrogen requirements might want to consider supplemental options.

Pennington Full Season Lawn Fertilizer offers a high nitrogen content with an N-P-K ratio of 32-0-5, making it suitable for promoting lush, green grass. A noteworthy feature is its polymer-coated urea, which ensures a slow release of nitrogen over four months, reducing the need for frequent applications. This makes it convenient for users looking for an easy, single-application solution for the entire season.

Additionally, the inclusion of 5% iron helps achieve a deeper green color in the lawn. The product also contains beneficial microorganisms that help revitalize the soil, an added benefit for long-term lawn health. However, it's worth noting that this fertilizer is not available in Hawaii and South Dakota, which may limit accessibility for some users.

The granule form is simple to apply, covering up to 12,000 square feet, making it suitable for larger lawns. Potential buyers should consider the sizable package weight of 33.6 pounds, which might be cumbersome to handle for some individuals. This fertilizer appears to be a reliable choice for those needing a high-nitrogen fertilizer that is easy to use, promotes deep greening, and improves soil health over time.