Best Iron Sulfate Garden Fertilizers of 2026

The Miracle-Gro All Purpose Fertilizer is designed to nourish a wide variety of plants, whether indoors or outdoors. It supports the growth of everything from roses and flowers to vegetables and trees, making it a versatile choice for any gardener. The formula is packed with essential nutrients like nitrogen, phosphorus, and potassium, which are crucial for healthy plant development. When you use this fertilizer, you'll notice your plants growing bigger and more vibrant quickly. Application is simple too—just mix the recommended amount with water, making it easy to feed your plants regularly and keep them thriving.

Miracle-Gro Shake 'n Feed All Purpose Plant Food is a powder-formulated garden fertilizer, that provides essential nutrients for productive plants. It contains vital micronutrients and natural ingredients, such as kelp, earthworm castings, feather meal, and bone meal. These ingredients feed the microbes in the soil, which support root strength, development, and increase water efficiency. This fertilizer can be used in both ground and containers, feeds up to 3 months, and won't burn plants when used as directed.

Enhance your gardening experience with Fox Farm Big Bloom Liquid Concentrate Fertilizer. Made in the USA, this fertilizer comes in a compact package, with a length of 4.064 cm, a width of 6.35 cm, and a height of 20.066 cm. It falls under the garden fertilizers category, making it an ideal choice for gardening enthusiasts who want to take good care of their plants.

Farmer's Secret Revitalizer is an organic soil microbe booster that feeds the soil, not just the plants. By stimulating microbial activity in your soil, it enhances the success rate of all plant types. This liquid compost soil is like a fast-track to composting. For optimal results, apply monthly during the growing season, particularly in spring and fall. Free from synthetic chemicals, its main ingredient is activated humics from organic sources. With a concentrated formula that requires dilution at a 1 oz to 1 gallon ratio, applying it to your soil is a breeze. Farmer's Secret Revitalizer is a product made with pride in Kentucky, crafted based on the knowledge of award-winning farmers.

Scotts Turf Builder Lawn Food is designed to feed and strengthen grass, improve root growth, and enhance the lawn's ability to absorb water and nutrients. This grass fertilizer can be applied to both wet and dry lawns and works on any grass type. Each 12.5 lb. bag can cover up to 5,000 sq. ft.

GARDENWISE Liquid Fertilizer is a comprehensive plant nutrition solution, offering a balanced blend of Nitrogen, Phosphorus, and Potassium for lush foliage, root development, and overall plant health. It's suitable for all gardens, including vegetables, lawns, indoor plants, and flowers. Enriched with seaweed extract, it promotes growth and enhances root systems. The 6% Chelated Iron combats chlorosis efficiently, ensuring vibrant greenery without the need for separate supplements. Its easy-to-use formula simplifies gardening for beginners and professionals alike.

Scotts Green Max Lawn Food is a powerful lawn fertilizer enriched with iron to promote deep greening in just 3 days. The 5% iron content enhances the greening process rapidly. This product is suitable for all grass types throughout the year. It won't leave stains on your driveway or other surfaces if used correctly. Each 16.67 lb. bag covers 5,000 sq. ft., providing ample nourishment for your lawn.

Farmer's Secret Fruit & Bloom Booster is a root and foliar plant food made for a variety of fruits. It is designed with classic nutrients such as nitrogen, zinc, and iron to strengthen roots, increase yield, and encourage strong growth. It can be used in both soil and hydroponic kits, and is perfect for winterizing. Simply dilute and spray the solution as soon as your plants begin to fruit, and continue using biweekly or monthly depending on the needs of your fruit.