10 Best Liquid Lawn Fertilizers 2025 in the United States

Miracle-Gro Indoor Plant Food is a convenient liquid fertilizer designed specifically for indoor plants. Each pack contains two 8 oz. bottles, making it easy to handle and store. A key benefit is its instant nutrient release, which helps plants thrive quickly. It's versatile and can be used on a wide range of indoor plants, including houseplants, vegetables, and flowers. The fertilizer can be directly applied to the soil or mixed with water, offering flexibility in application methods.

The product is tailored for indoor use only, so it may not be suitable for larger outdoor lawn areas. Additionally, the coverage area is limited to pot size, which might not be ideal for users looking to fertilize extensive garden spaces. Miracle-Gro Indoor Plant Food is best for those with indoor plants seeking a simple and effective solution to boost plant health.

PetraMax Neighbor’s Envy Grass Fertilizer offers a comprehensive solution for lawn care enthusiasts. This 7-in-1 formula combines essential nutrients such as nitrogen, iron, potassium, and additional ingredients like humic acid and sea kelp, which help promote deep green color, strong roots, and lawn health. The product’s high nitrogen content (19%) ensures rapid grass growth and the iron component (2.5%) contributes to a rich, dark green hue. The added humic acid enriches the soil, enhancing its fertility. Sea kelp and sulfur in the mix contribute to drought resistance and improved soil health respectively, making your lawn more resilient to stress and environmental changes.

One gallon of this liquid concentrate can cover up to 16,000 square feet, making it quite economical for larger lawns. The ease of application is another standout feature, as it can be sprayed using a PetraTools sprayer or a hose-end applicator, showing visible results within 7-14 days. This fertilizer is suitable for various grass types including Bermuda, Fescue, Kentucky Bluegrass, Zoysia, and St. Augustine, and its non-toxic formula ensures safety for pets and children.

However, the product does weigh 9.5 pounds and might be slightly cumbersome to handle for some users. It is also worth noting that its effectiveness largely depends on proper application. Developed by PetraMax in the USA, it comes with a 100% satisfaction guarantee, which offers peace of mind for the buyers. This product is ideal for those looking for an all-in-one solution to maintain a lush, green, and healthy lawn.

The Sunday Green Machine Fertilizer is a liquid lawn fertilizer designed to make lawn care easy and effective. Its N-P-K ratio is 22-0-3, meaning it provides a strong dose of nitrogen for greening and growth, some potassium for overall lawn health, but no phosphorus. This is good for established lawns that don’t need phosphorus, but might not be ideal if your soil is phosphorus-deficient. The fertilizer includes helpful extras like seaweed and iron, which support deeper roots and improve resistance to stress or injury.

Application is simple and user-friendly thanks to the universal sprayer attachment that connects directly to your hose, letting you cover up to 10,000 square feet in about 15 minutes without any mixing or complicated steps. The liquid form allows nutrients to be absorbed quickly, which is great for faster results compared to granular fertilizers that release nutrients slowly. However, since it’s a fast-release fertilizer, you’ll need to reapply it every 4 to 6 weeks during the growing season for best results. It’s recommended for use when temperatures are between 60 and 89°F and to avoid fertilizing late in the year to prevent damaging your lawn.

This two-pack size provides plenty of product for medium to large lawns, but if you have a very large area or need a slow-release option, you might look for other fertilizers. This product is well suited for homeowners seeking a straightforward, quick-application fertilizer that promotes lush green growth with some added natural ingredients, especially if you want to avoid harsh chemicals.