10 Best High Nitrogen Fertilizer 2025 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 Miracle-Gro Shake 'n Feed Extended Boost is a granular fertilizer known for its long-lasting feeding capability, providing nutrients to plants for up to six months. This makes it highly convenient, as it reduces the frequency of applications. It is versatile and can be used with a wide variety of plants, including flowers, vegetables, and container plants. Additionally, it works through mulch, making it an excellent choice for garden beds and areas with mulch coverings.

One of the strengths of this product is its ease of use; simply shake it over the desired area and water to activate the feeding process. A 3 lb. container covers up to 111 sq. ft., making it suitable for both small and medium-sized gardens.

It is important to note that this is a synthetic fertilizer, which might not be suitable for those looking for organic options. Additionally, while it includes essential nutrients for root development and plant growth, users seeking a high-nitrogen content specifically might need to check if the 5:5:10 ratio meets their specific needs. This product is ideal for gardeners looking for a low-maintenance, long-lasting solution to plant feeding.

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.