Best Ferrous Sulphate For Lawns for Different Lawn Sizes

#1 · Best Overall

1. Hi-Yield Iron Sulfate 4 lb

• Form: Granules

Best for: Spreader-Ready Four-Pound Bag.

Why it ranks #1: Its directions give a specific lawn rate of 4 pounds per 1,000 square feet, recommend spreading granules, and say to water in after application.

Hi-Yield gives a concrete lawn rate of 4 pounds per 1,000 square feet, making its four-pound granular product straightforward to size for a defined turf area. The directions call for a hand or power-operated gravity or rotary spreader, then watering in after application.

The label ties the four-pound quantity to treatment of up to 1,000 square feet, so lawn owners can match the package to that stated area. Granules can go through a hand or power-operated gravity or rotary spreader, offering familiar application options. The product is recommended for preventing and correcting iron-deficiency chlorosis and also aids in creating acid soil conditions. Applying in cool morning hours is recommended, making timing part of the routine rather than an optional detail.

Skip it if you want a two-bag supply for up to 2,000 square feet; Factory Hardware Store's Hi-Yield Iron Sulfate 2-pack lists that total coverage.

Choose Hi-Yield when a four-pound bag and explicit spreader rate match a lawn of up to 1,000 square feet. Plan to water in and follow the recommendation to apply during cool morning hours.

Listed on Amazon as: Hi-Yield (32340) Iron sulfate, 4 lbs

#2 · Lawn Coverage Pick

2. Hi-Yield Iron Sulfate 3.25 lb

• Form: Granules
• Weight: 3 lb

Best for: Chlorosis Care With Magnesium.

Why it ranks #2: The granular product lists up to 1,000 square feet of coverage and recommends monthly application as needed, giving lawn owners useful coverage guidance.

Hi-Yield's 34340-1 listing adds a soluble magnesium source to iron sulfate, a specific distinction for buyers addressing plant chlorosis. It is a granular supplement for lawns, shrubs, flowers, and gardens, with additional directions covering foliage sprays and soil treatments for broader plant-care routines.

The verified product facts say readily available magnesium aids in correcting plant chlorosis, complementing the listing's iron-sulfate purpose of preventing or correcting yellowing. Application can be monthly as needed and may be either a foliage spray or a soil treatment. For a spray, the directions specify 2 tablespoons per gallon of water and soaking the plant thoroughly. The listing also identifies palms and white hydrangea blooms as uses, extending its relevance beyond turf while making it a more plant-specific choice.

Skip it if you want a lawn-focused 4-pound bag with a stated turf rate; Hi-Yield Iron Sulfate 4 lbs specifies 4 pounds per 1,000 square feet.

Choose this Hi-Yield option if chlorosis treatment across lawns and ornamental plants, including palms or hydrangeas, fits your needs. Its magnesium and spray directions add flexibility, while a lawn-only buyer may prefer a simpler turf-rate listing.

Listed on Amazon as: Hi-Yield (34340-1) Iron Sulfate, 3.25 lbs

#3 · Multi-Bag Option

3. Hi-Yield Iron Sulfate 2 Pack

• Form: Granules
• Weight: 3.3 lb

Best for: Two-Bag Seasonal Lawn Supply.

Why it ranks #3: Two 3.25-pound bags are listed, with each covering up to 1,000 square feet, for a stated total coverage of up to 2,000 square feet.

This Factory Hardware Store bundle pairs two 3.25-pound Hi-Yield Iron Sulfate bags, with stated total coverage of up to 2,000 square feet. That quantity supports multiple applications or a larger lawn-and-garden routine, while the granular format can be spread by hand or with common lawn spreaders.

Each bag is listed to cover up to 1,000 square feet, so the pair gives a stated total of up to 2,000 square feet across lawns, shrubs, flowers, and garden beds. Granules spread with common lawn spreaders or by hand, letting buyers use equipment for broad turf areas and target smaller spaces manually. The description emphasizes supporting green color and plant appearance. The bundle's two-bag quantity is useful for repeated work, but actual coverage depends on treating areas within the stated per-bag limit.

Skip it if you need a single four-pound bag with an explicit lawn rate; Hi-Yield Iron Sulfate 4 lbs lists 4 pounds per 1,000 square feet.

This two-bag bundle fits homeowners treating up to 2,000 square feet across turf and garden areas, especially when hand spreading or a common spreader suits the job. Keep each bag's stated 1,000-square-foot coverage in mind.

Listed on Amazon as: Hi-Yield Iron Sulfate for Lawns & Gardens 3.25 lb – Granular Soil Supplement – Supports Green Color & Soil Conditioning – 1,000 sq ft Coverage (2 Pack)

#4 · Lawn-Rate Directions

4. OULLYY Ferrous Sulfate Granules

• Form: Granules

Best for: Water-Diluted Lawn Feeding.

Why it ranks #4: Its dry-application directions specifically address lawns and say to broadcast evenly, though the supplied lawn-rate detail is cut off.

OULLYY combines 20% iron with 12% sulfur in water-soluble ferrous sulfate heptahydrate, giving lawn and garden owners a mixable option for root watering. Its directions also describe dry lawn application, so it can suit buyers choosing between a diluted soil treatment and broadcasting granules.

For watering soil, the supplied directions call for diluting the product with clean water at 1:500 and applying directly to plant roots about every 30 days. The separate dry-use directions give a lawn broadcast rate of 2 pounds per 1,000 square feet, allowing a lawn owner to follow a spread-and-water-in workflow instead. The 20% iron and 12% sulfur composition adds a stated nutrient profile, while the 1-pound quantity suits a defined treatment area rather than large-scale stockpiling.

Skip it if you need to treat more than 500 square feet at the listed lawn rate; Hi-Yield Iron Sulfate 4 lbs covers up to 1,000 square feet.

Choose OULLYY if a 1-pound quantity, root-watering option, and stated lawn broadcast rate fit your routine. Its directions distinguish diluted root watering from dry lawn use, so follow the method and rate appropriate to the treatment.

Listed on Amazon as: Ferrous Sulfate Fertilizer for Plants, Ferrous Sulfate Heptahydrate Granules 20% Iron (Fe) – Plant Food to Help Greener Grass, Lawn, shrubs, Trees and Gardens (1 Pound)

#5 · 20% Iron Granules

5. GRANDAN Ferrous Sulfate Granules

• Form: Granules
• Weight: 0.45 kg

Best for: Easy-Storage Granule Lawn Care.

Why it ranks #5: The one-pound heptahydrate granules contain 20% iron and 12% sulfur and are described for organic lawn use and soil conditioning.

GRANDAN specifies 3/16-inch ferrous sulfate heptahydrate granules with 20% iron and 12% sulfur, combining a defined particle size with a nutrient profile. The listing says the material is stable and easy to store, which suits buyers who want a granular soil amendment for lawn and plant care.

The 3/16-inch granules give the product a specified physical form, while the water-soluble description supports use as a soil amendment rather than limiting it to dry placement. Its 20% iron and 12% sulfur are identified alongside the stated role of lowering pH in highly alkaline soils, helping plants obtain nutrients. The one-pound quantity is manageable for household lawn and garden use. The listing also associates iron with chlorophyll production and treatment of iron deficiency.

Skip it if you need a larger stated lawn coverage area from one purchase; Hi-Yield Iron Sulfate 4 lbs lists treatment up to 1,000 square feet.

GRANDAN fits buyers wanting a one-pound granular soil amendment with specified iron and sulfur content and an easy-to-store claim. Its alkaline-soil conditioning use is relevant, but the supplied details give no lawn application rate.

Listed on Amazon as: GRANDAN Ferrous Sulfate Heptahydrate 1 Lb – 3/16 Inch FeSO47H2O Granules – 20% Iron (Fe) Stable and Easy to Store – Organic Lawn Fertilizer for Vegetables and Plant Growth

#6

6. Greenway Biotech Ferrous Sulfate

• Form: Powder
• Weight: 16 oz

Best for: Soluble Iron For Turf Care.

Why it ranks #6: This one-pound powder lists 20% soluble iron and 12% sulfur, with lawns among its stated uses, but no lawn-specific application rate is supplied.

Greenway Biotech specifies ferrous sulfate heptahydrate with 20% soluble iron and 12% sulfur, and identifies iron in the Fe2+ form that plants take up directly. That composition makes it a focused choice for lawn owners treating iron-related yellowing while also feeding trees, shrubs, vegetables, and acid-loving plants.

The product links Fe2+ iron to chlorophyll production and green, vigorous foliage, while its description identifies interveinal yellowing on new growth as a target symptom. Because the powder is fully water soluble, it offers flexible feeding rather than a granule-only application workflow. The 16-ounce quantity provides a pound of product for mixed lawn and landscape use. Handling calls for protective gloves and eyewear, an important part of preparation before measuring or mixing the powder.

Skip it if you prefer ready-to-broadcast granules and no powder-handling precautions; Hi-Yield Iron Sulfate 4 lbs is a granular lawn option.

Greenway Biotech suits lawn and landscape owners seeking soluble Fe2+ iron for chlorosis symptoms across several plant types. Choose it if powder mixing fits your routine, and account for the listed protective-glove and eyewear precautions.

Listed on Amazon as: Greenway Biotech Ferrous Sulfate 20% Iron Fe Fertilizer, Water Soluble Plant Food with Sulfur for Lawns Trees Shrubs Vegetables and Acid-Loving Plants, Powder Soil Amendment 1 LB

#7

7. Eyaeyao Ferrous Sulfate Granules

• Form: Granules

Best for: Compact Granule Lawn Treatment.

Why it ranks #7: Its title identifies granular iron sulfate for lawns and turf, but the supplied details do not state iron percentage, package coverage, or application directions.

Eyaeyao offers 20% iron ferrous sulfate granules labeled as a soil acidifier for lawns and plants, pairing a granular form with a stated lawn use. The listing also targets iron deficiency and yellowing, making it a compact option for buyers seeking a turf-focused supplement.

The title connects the granules with soil acidification and correcting iron deficiency, so the product is framed for lawns and other plants rather than as a general-purpose chemical. Its granular form supports spreading onto soil, while the listed 20% iron concentration identifies its nutrient content. The 8-ounce package is a small quantity for limited areas or a targeted treatment. However, the supplied product information does not give a lawn rate or detailed application directions, so those specifics are not established here.

Skip it if you need to treat a broad lawn at a stated rate; Hi-Yield Iron Sulfate 4 lbs lists coverage up to 1,000 square feet.

Eyaeyao may suit a small lawn or targeted plant treatment when granular form and a 20% iron label meet your needs. The 8-ounce quantity is the key boundary, and no lawn application rate is provided.

Listed on Amazon as: Ferrous Sulfate Granules 20% Iron, Soil Acidifier for Lawns & Plants | Fast Greening for Grass, Turf, Shrubs, Trees, Flowers & Gardens | Corrects Iron Deficiency & Yellowing (8 oz)

#8

8. Alpha Chemicals Ferrous Sulfate

• Form: Powder

Best for: Very Soluble Heptahydrate Powder.

Why it ranks #8: The one-pound, very soluble heptahydrate powder contains 20% iron, but its description emphasizes broad uses rather than lawn directions or coverage.

Alpha Chemicals identifies its ferrous sulfate as the very soluble heptahydrate form with 20% iron, giving buyers a clearly specified powder for dissolving into a treatment mixture. Its listed uses span water treatment, moss control, and animal feed supplements, so it suits shoppers seeking a broadly usable compound.

The 20% iron specification gives the powder a defined nutrient concentration, while the very soluble heptahydrate form supports dissolving it for applications that call for a solution. The listing also names water treatment, moss control, and animal feed supplements among its uses, signaling a broader-purpose material rather than a lawn-only fertilizer. It comes in a bottle and is listed as one pound. No lawn application rate or lawn-specific directions are supplied, so turf treatment requires guidance beyond the provided product facts.

Skip it if you want a listed turf rate and spreader instructions; Hi-Yield Iron Sulfate 4 lbs specifies a lawn rate per 1,000 square feet.

This Alpha Chemicals powder fits buyers who value a very soluble heptahydrate form and also need a broadly listed compound. For lawn treatment, choose it only if you already have suitable application guidance, since none is supplied here.

Listed on Amazon as: Ferrous Sulfate Heptahydrate – FeSO47H2O – 20% Iron – Very Soluble – 1 Pound

#9

9. xixisusu Ferrous Sulfate Powder

• Form: Powder
• Weight: 8 oz

Best for: Yellow-Leaf Iron Supplement.

Why it ranks #9: This eight-ounce powder is presented for plants, trees, lawns, and shrubs, but supplied details omit iron percentage and lawn application guidance.

Xixisusu presents concentrated ferrous sulfate powder for plants showing yellow leaves, including lawns, trees, shrubs, and houseplants. The product description emphasizes readily available iron and fast action, making it a focused option for buyers addressing suspected iron deficiency across mixed planting areas.

The powder is described as a source of essential iron intended to combat yellowing leaves and restore green color. Its listed uses span lawns, trees, shrubs, and houseplants, so one product can serve several plant settings rather than only a turf area. The description also identifies acid-loving plants as a fit. At 8 ounces, it is a small quantity for buyers who want a supplemental iron treatment, though the supplied details do not give a lawn application rate or mixing directions.

Skip it if you need a stated lawn rate or application method; Hi-Yield Iron Sulfate 4 lbs lists a rate for 1,000 square feet.

Consider this 8-ounce powder when yellowing leaves and a multi-plant iron supplement are the priority. It suits buyers who can follow their own product-specific application guidance; the supplied details do not provide a lawn rate or mixing instructions.

Listed on Amazon as: Iron Sulfate for Plants – Ferrous Sulfate Powder to Correct Chlorosis & Yellow Leaves, Fast-Acting Iron for Plants, Trees, Lawns & Shrubs – Essential Nutrient Supplement (8 oz)

#10

10. USEDGDIG Ferrous Sulfate Powder

• Form: Powder
• Weight: 1.6 oz

Best for: Resealable Water-Soluble Powder.

Why it ranks #10: The one-pound product lists 20% iron and 12% sulfur but focuses on indoor and outdoor garden plants, with no stated lawn use or lawn directions.

USEDGDIG specifies a resealable bag for its water-soluble ferrous sulfate heptahydrate powder, giving buyers a way to store remaining product for future use. The formula lists 20% iron and 12% sulfur and is presented for indoor and outdoor plants, vegetables, and flower gardens.

The powder is described as 100% water soluble, supporting preparation as a dissolved fertilizer for garden plants. Its stated 20% iron and 12% sulfur provide a defined nutrient profile, and the description connects the product with chlorophyll formation and greener leaves when foliage yellows. The resealable bag is intended to store leftovers for future use, which suits intermittent treatments. Although it can serve indoor and outdoor plants, the supplied information does not provide a lawn-specific application rate.

Skip it if you need a stated turf rate and spreader directions; Hi-Yield Iron Sulfate 4 lbs lists both for lawn application.

USEDGDIG suits buyers wanting a resealable, water-soluble powder for intermittent indoor or outdoor plant care. Its stated nutrient profile is clear, but lawn owners should note that the supplied details do not specify a turf application rate.

Listed on Amazon as: USEDDIG 1 LB Ferrous Sulfate Heptahydrate Fertilizer- 20% Iron (Fe), 12% Sulfur, Indoor/Outdoor Soil Acidifier for Plants Vegetables and Flower Gardens