Choosing the right nitrogen fertilizer is key to achieving a lush, green lawn. This guide compares five highly-rated options available on Amazon, focusing on nitrogen content, release type, and suitability for different grass types and climates. Each product section includes practical usage notes and references to the listed features to help you pick a fertilizer that fits your lawn’s needs and your maintenance schedule.
| Product | Brand | N-P-K | Key Benefit |
|---|---|---|---|
| Milorganite Lawn and Garden Nitrogen Fertilizer 6-4-0 | Milorganite | 6-4-0 | Low-salt formula protects plants; iron enrichment for lasting green |
| Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 (32 oz) | Simple Lawn Solutions | 28-0-0 | Attached sprayer for easy, even application; quick and slow release mix |
| Scotts Green Max Lawn Food with Iron | Scotts | — | Dual-action iron formula for rapid greening |
| Petramax Liquid Nitrogen Fertilizer 28-0-0 | Petra | 28-0-0 | Liquid, quick and slow release blend for fast green and ongoing feed |
| Jonathan Green Veri-Green Nitrogen Lawn Fertilizer 29-0-3 | Jonathan Green | 29-0-3 | Iron-enhanced for deep green; long-lasting feeding up to 3 months |
Note: All products listed are designed to help improve lawn color and growth with varying nitrogen sources and release profiles. Availability and packaging may change; check current product pages for up-to-date details and application directions.
Milorganite Lawn and Garden Nitrogen Fertilizer 6-4-0
Product overview: Milorganite is a 6-4-0 nitrogen fertilizer derived from recycled organic material. Its low-salt formula is designed to protect plants from dehydration and stress, making it suitable for use in hot weather and across a variety of settings, including both lawns and edible gardens. The fertilizer is enriched with naturally occurring iron to promote a lasting, vibrant green without staining sidewalks or concrete.
Key features: Safe for roots and broad use; reduces plant stress; iron-rich for deep green color; non-staining, low-salt formulation. This product supports steady root growth and durable lawn health, particularly in heat and drought stress. For best results, apply according to package directions and water in to help the nutrients reach the root zone.
Usage notes: Milorganite is typically broadcast applied to established lawns. Because it’s organic and slow-release, expectations should focus on steady, long-term greening rather than immediate coloration. Suitable for lawns with sensitive plants or near walkways where staining is a concern.
Maximum Green & Growth Fertilizer High Nitrogen 28-0-0
Product overview: This liquid lawn fertilizer is a high-nitrogen 28-0-0 formula designed for quick green-up, with an attached sprayer for convenient, even application. It is suitable for all grass types and is engineered to provide a blend of quick-release and slow-release nitrogen to sustain growth between applications.
Key features: Attached sprayer for precise dosing; covers large areas up to 3,200 square feet with the sprayer; 70% quick-release nitrogen for rapid results and 30% slow-release nitrogen for ongoing feeding. It supports lush growth and strong chlorophyll production, ideal for early-season and mid-season maintenance.
Usage notes: Follow the included instructions for dilution ratios and application timing. Avoid applying under extreme heat or drought conditions unless your lawn is under adequate irrigation. This product is well-suited for homeowners seeking quick, noticeable greening and robust growth when used as part of a regular lawn care program.
Scotts Green Max Lawn Food with Iron
Product overview: Scotts Green Max is a dual-action fertilizer that feeds lawns while delivering iron to accelerate greening. The added iron supports color development and helps to produce a deep, vibrant green in a short period, making it popular for rapid improvements in curb appeal.
Key features: Contains iron to enhance greening; suitable for any grass type in spring, summer, or fall; provides balanced feeding to promote root health and resilience. The iron component can help reduce the time needed to achieve a visibly greener lawn after application.
Usage notes: Water after application if recommended by the product label. Align feeding with your grass type, climate, and irrigation schedule to optimize color and growth. This product is best used as part of a broader lawn care plan that includes proper mowing and irrigation.
Petramax Liquid Nitrogen Fertilizer 28-0-0
Product overview: Petra’s liquid 28-0-0 nitrogen fertilizer uses a mix designed for quick green-up with both fast-acting and slow-release components. The liquid format allows easier foliar and root uptake, enabling rapid response in greener grass and robust growth over time.
Key features: 70% quick-release nitrogen for rapid greening and 30% slow-release nitrogen for sustained feeding; compatible with all grass types; easy spray application for large areas and spot treatments.
Usage notes: Apply according to label directions and calibrate equipment to ensure even distribution. Avoid over-application that could lead to burning or nutrient runoff. This product supports short-term color gains and long-term lawn vigor when used within a regular fertilization program.
Jonathan Green Veri-Green Nitrogen Lawn Fertilizer 29-0-3
Product overview: Veri-Green is a 29-0-3 nitrogen lawn fertilizer designed for quick greening with added iron. The formulation emphasizes rapid color development while offering a gradual nutrient release for ongoing lawn health, helping to protect against drought stress through improved root vigor.
Key features: Iron-enhanced deep green color; gradual feeding for up to 3 months; suitable for all grass types; performance is optimized in moderate climate conditions.
Usage notes: Apply during active growth periods and avoid application during extreme heat or drought without adequate irrigation. This product is positioned for steady color enhancement and sustained growth, making it a strong option for lawns needing consistent color and vigor over a growing season.
Buying Guide
When selecting a nitrogen fertilizer for your lawn, consider these factors to match products to your needs:
- Nitrogen content and release type: Higher nitrogen levels (e.g., 28-0-0 or 29-0-3) deliver faster greening, but quick-release nitrogen can cause rapid growth spikes. A mix of quick-release and slow-release nitrogen provides faster color with sustained feeding.
- Form factor: Granular fertilizers are slow-release and easy to apply with spreaders, while liquid formulas offer rapid uptake and convenient spray application for larger areas or spot treatments.
- Iron content: Iron accelerates greening and contributes to a deeper color, but verify that the product’s iron component does not stain surfaces when used as directed.
- Soil and climate considerations: In hot climates, low-salt formulas reduce the risk of dehydration. In drought-prone regions, products with slower nitrogen release can help maintain color between applications.
- Safety and compatibility: Check for safe-use guidance near edible gardens, pet areas, or children’s spaces. Organic or recycled-content fertilizers may offer different environmental benefits and application considerations.
- Application timing: Align feeding with grass type (warm-season vs. cool-season), season, and irrigation schedule. Avoid applying during heat stress or drought without adequate water.
- Coverage and efficiency: Look at coverage per container and per sprayer if included. Hose-end sprayers and attached sprayers simplify even application and can improve efficiency for larger lawns.
These options reflect a range of common lawn care needs, from rapid greening to steady long-term growth. For best results, combine fertilizer use with proper mowing height, irrigation practices, and seasonal lawn maintenance routines. Always follow the product label for application rates and safety guidelines to protect your lawn and the surrounding environment.