10 Best Garden Fertilizers 2025 in the United States

The Scotts Turf Builder Weed & Feed3 is a combination lawn fertilizer and weed killer designed for those who want to maintain a healthy, weed-free lawn. One of its main strengths is its dual functionality; it not only fertilizes the lawn but also controls more than 50 types of common weeds, including dandelions and clover. This makes it particularly suitable for homeowners dealing with persistent weed issues.

The product’s coverage of 5,000 sq. ft. is substantial, meaning it can handle medium to large lawns with ease. It is also compatible with various grass types like Bahiagrass, Bermudagrass, Bluegrass, Centipedegrass, Fescue, Ryegrass, and Zoysiagrass, which adds to its versatility. However, it's important to note that this product is not available in Florida, so residents there will need an alternative solution.

The application requires the lawn to be wet and the temperature to be between 60°F and 90°F, which may require some planning. Being a synthetic fertilizer, it might not appeal to those looking for an organic option. Scotts Turf Builder Weed & Feed3 is a reliable and effective choice for users who prioritize convenience and the dual action of weed control and fertilization.

Osmocote Smart-Release Plant Food Plus is a versatile fertilizer suitable for both indoor and outdoor plants, including those in containers and in-ground gardens. It contains 11 essential nutrients, ensuring comprehensive nourishment for a wide range of plant types. With an N-P-K ratio of 15-9-12, it provides a balanced mix of nitrogen, phosphorus, and potassium, promoting healthy growth and development.

One of its standout features is its gradual release formula, feeding plants for up to 6 months, which reduces the frequency of reapplication and maintenance effort. This product is easy to use; simply sprinkle the granules and mix them into the soil, then water regularly. An 8 lb. container can cover around 300 sq. ft., making it economical for larger gardens. Although it is a synthetic fertilizer, it is fortified with secondary nutrients beneficial for plant health.

Some users might prefer organic options, which this product is not. It works best when mixed into the top 1-3 inches of soil, which might be a bit of extra work for some. In summary, Osmocote Smart-Release Plant Food Plus is a reliable choice for gardeners looking for a long-lasting, comprehensive fertilizer for a variety of plants.

The Osmocote 14-14-14 Classic Slow Release Fertilizer is a balanced fertilizer with equal parts nitrogen, phosphorus, and potassium (14-14-14), making it a versatile option for general landscape use. Its slow-release formula is designed to feed plants gradually over 3 to 4 months, which helps reduce the need for frequent applications and lowers the risk of burning plants. The product comes in a large 50-pound bag, suitable for covering substantial garden or lawn areas.

This fertilizer is synthetic, which often means consistent nutrient content and predictable performance, but it does not contain organic matter that some gardeners prefer for improving soil health. It does not specify additional micronutrients, which are important elements that help plants thrive beyond the main N-P-K nutrients. Soil pH compatibility is not detailed, so it is best used on soils that are already close to neutral or slightly acidic or alkaline, as extreme pH levels might affect nutrient uptake.

Application is straightforward as a powder, typically spread around plants or incorporated into the soil. Due to its slow-release properties, it is especially suitable for gardeners wanting low-maintenance feeding over a few months without repeated fertilizer treatments. For those seeking organic options or fertilizers tailored for specific soil conditions, alternative products might be preferred. Osmocote 14-14-14 serves as a reliable choice for general landscape feeding with its balanced nutrients and slow-release convenience.