10 Best Organic Lawn Fertilizer 2025 in the United States

The O.M. Scott & Sons Natural Grass Food is a notable option for those seeking an organic lawn fertilizer. One of its major strengths is the use of premium nutrient sources derived from nature, which supports healthy grass growth from the roots up. It's designed to provide continuous feeding for up to 10 weeks, which means less frequent application is needed, making it more convenient for busy homeowners. Additionally, it's safe for people and pets when used as directed, making it a family-friendly option.

This product is suitable for all grass types and covers up to 2,000 square feet, ensuring broad usability and efficiency. The packaging is also environmentally friendly, being recyclable which adds to its appeal for eco-conscious consumers. If you're looking for an organic fertilizer that is easy to use, environmentally friendly, and well-reviewed, this could be a good match for your lawn care needs.

Jobe's Organics Granular All Purpose Fertilizer is a versatile choice for organic gardening, designed to nourish various plants including vegetables, flowers, shrubs, and trees. The 16-pound bag is easy to manage and contains granules with a balanced NPK ratio of 4-4-4, which is beneficial for promoting healthy plant growth and vibrant foliage. One of the product's standout features is its organic composition, free from synthetic chemicals and OMRI listed for organic gardening, reassuring users of its environmentally-friendly nature.

The fertilizer is designed to minimize wasteful runoff, mess, and odors, making it a convenient choice for gardeners who want to maintain a tidy workspace. Its granular form allows for straightforward application every 2-3 weeks during the growing season, ensuring plants receive consistent nourishment without the risk of over-fertilization.

In terms of microbial content, the product is formulated to support soil health, aiding in root development, plant growth, and soil conditioning. This can be particularly useful for gardeners dealing with pest resistance and drought conditions. The simplicity of a 4-4-4 mixing ratio may not cater to specific nutrient needs for certain plant types that require varying levels of nitrogen, phosphorus, or potassium. Also, while the resealable packaging is convenient, its size and weight might be cumbersome for those with limited storage space.

Jobe's Organics Fertilizer performs well in adhering to organic gardening standards, offering an accessible solution for maintaining plant health while being mindful of the environment.

Milorganite Recycled Lawn and Garden Nitrogen Fertilizer is a standout choice for those seeking an organic solution for their lawn and garden needs. Its low-salt formula protects plants from stress and ensures it's safe to use even during hot conditions. The nutrient source is primarily recycled organic material, which is excellent for the environment as it repurposes waste into a valuable product.

With the inclusion of naturally occurring iron, it helps lawns achieve a deep green color without staining nearby surfaces, which is a great bonus for maintaining the aesthetics of your garden paths or driveways. The granular form of this fertilizer makes it easy to apply evenly, aiding in consistent growth and reducing the risk of patchy areas. Each application lasts up to 10 weeks, meaning less frequent feedings and healthier soil over time.

However, one potential downside is the weight and size of the product, as the 32-pound bag might be cumbersome for some users to handle. Additionally, while it covers a substantial area of 2500 square feet, larger lawns may require multiple bags, potentially increasing costs. This fertilizer is well-suited for a variety of uses, including lawns, edible gardens, and houseplants, making it versatile for different gardening needs.