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 Urea Fertilizer 46-0-0 by Cz Garden is a high-nitrogen fertilizer designed to promote lush growth across a wide range of plants, including indoor flowers, garden vegetables, green lawns, and citrus trees. The key strength of this product is its high nitrogen content (46%), which is essential for vigorous leaf growth and overall plant health. This makes it an excellent choice for those looking to improve the foliage of their plants quickly and effectively.

The granules' water-soluble nature ensures that the nitrogen is readily available for the plants to absorb, providing fast results. Additionally, the fertilizer comes in a convenient resealable pouch that makes it easy to store and use as needed without wastage. Another unique feature is its application for tie-dye projects, showcasing its versatility beyond just plant nourishment.

However, it's important to note that this fertilizer is synthetic, which might not appeal to those strictly seeking organic options. Furthermore, it does not contain additional nutrients that some plants might require for balanced growth, so combining it with other fertilizers might be necessary for some users. While its high efficiency makes it suitable for boosting plant health, users should follow the instructions carefully to avoid over-fertilization, which can harm plants. The Urea Fertilizer 46-0-0 is well-suited for gardeners looking for a powerful, versatile nitrogen boost for their plants.

Supply Solutions Urea 46-0-0 is a synthetic, granular fertilizer with a high nitrogen content of 46%, which is excellent for promoting lush, green growth in lawns, gardens, and various crops. Its pure urea formulation makes it very effective for quickly supplying nitrogen, a vital nutrient that helps plants develop strong stems, vibrant foliage, and higher yields of flowers, fruits, and vegetables.

The product is versatile, suitable for many types of plants and growing methods, making it a convenient choice for both home gardeners and professional growers. However, it does not contain additional nutrients like phosphorus or potassium, so it might need to be paired with other fertilizers for balanced soil nutrition. Also, since it is synthetic and releases nitrogen relatively quickly, there is a need to apply it carefully to avoid overfeeding plants or causing nitrogen runoff.

The granule form is easy to spread, but because it is not organic, it may not appeal to those looking for natural gardening solutions. This fertilizer is a strong option when the main goal is to boost nitrogen levels efficiently and support vigorous plant growth, especially for leafy results and improved harvests.