10 Best High Nitrogen Fertilizer 2026 in the United States

The Burpee Organic Blood Meal Fertilizer is a high-nitrogen fertilizer, boasting a 12-0-0 formulation, making it an excellent choice for promoting vigorous growth in green garden vegetables and leafy greens like tomatoes, spinach, and broccoli. This fertilizer is particularly well-suited for organic gardening, being OMRI Listed for organic use, and it supports soil health by encouraging beneficial soil microorganisms.

Additionally, the blood meal serves as a natural pest deterrent, repelling animals such as deer, rabbits, and moles, which is a bonus for gardeners dealing with these issues. Users must carefully follow the application instructions to avoid over-fertilization, which can harm plants. While the product's form as a blood meal ensures a potent nitrogen boost, it might not be suitable for those seeking a balanced nutrient mix, as it lacks phosphorus and potassium.

Moreover, some users might find the smell of blood meal unpleasant during application. Despite these minor drawbacks, the product maintains its reliability and effectiveness for most gardeners seeking a robust organic nitrogen source.

The Maximum Green & Growth High Nitrogen 28-0-0 NPK Liquid Fertilizer is designed to enhance lawn growth and color, making it an ideal choice for anyone looking to improve their grass health. With a high nitrogen content of 28%, it significantly supports the formation of chlorophyll, leading to a greener and more vigorous lawn. The fertilizer’s formulation includes both quick-release (70%) and slow-release (30%) nitrogen, ensuring immediate results and prolonged feeding between applications.

This dual-release mechanism is beneficial for consistent lawn maintenance and addressing nitrogen deficiencies effectively. The product is versatile, suitable for all types of grass, including Bermuda, St. Augustine, and Kentucky Bluegrass, and can be used on a variety of plants such as ornamentals, garden plants, and young trees. Its liquid form allows for easy application, and it can be integrated into existing fertilizer programs to enhance their effectiveness.

While the product is manufactured in the USA, the concentrated formula requires careful handling and precise measurement to avoid over-application. This product is synthetic, which may not appeal to those seeking organic gardening solutions. The Maximum Green & Growth High Nitrogen Fertilizer is excellent for quick greening and dense lawn development but should be used as part of a comprehensive lawn care program for the best results.

The Urea Fertilizer 46-0-0 from Easy Peasy is a high-nitrogen granular fertilizer, perfect for those seeking a robust nitrogen boost for their plants. With a nitrogen content of 46%, this product is among the highest concentration fertilizers available, making it a potent choice for promoting vigorous plant growth, especially in nitrogen-deficient soils. The fast-acting formula ensures that nutrients are quickly absorbed by plants, providing timely nourishment. This is especially beneficial for gardeners who want noticeable results in a shorter time frame.

The fertilizer's granule form makes it easy to apply, as you simply follow the package instructions, and it covers about 100 square feet per pint. Its versatility means it can be used across various plant types, from lawns to vegetable gardens, making it a flexible option for diverse gardening needs.

A significant advantage of this fertilizer is its cost-effectiveness. Due to its concentrated formula, only a small amount is required, offering great value for both hobbyist gardeners and professional landscapers looking to optimize their budget. On the downside, the product lacks additional nutrients, which means you might need to supplement it with other fertilizers to provide a balanced diet for your plants. Additionally, being a synthetic fertilizer, it may not be ideal for those looking for organic gardening solutions. Users should also be cautious with application, as excessive use could harm plants due to its high nitrogen content. This product is best suited for gardeners and landscapers who require a strong, fast-acting nitrogen source and who are comfortable using synthetic fertilizers. It's a practical choice for those focused on efficiency and cost savings, rather than an organic approach.