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 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 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.