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

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  • 20% Soluble Iron Plus 12% Sulfur: Single-ingredient ferrous sulfate heptahydrate (FeSO4-7H2O) delivers iron in the Fe2+ form plants take up directly, supporting chlorophyll production and green, vigorous foliage
  • Supports Plants Showing Yellowing Leaves: Formulated to feed plants exhibiting interveinal yellowing (chlorosis) between the veins of new growth, helping restore healthy green color as fresh leaves emerge
  • Fully Water Soluble for Flexible Feeding: Dissolves completely for foliar spray, soil drench, or broadcast application, giving you versatile options for gardens, beds, trees, shrubs, and ornamentals
  • Helps Lower Soil pH in Alkaline Ground: As it reacts in the soil, ferrous sulfate releases acidity that can help reduce pH over time, making iron and other nutrients more available to acid-loving plants like blueberries, azaleas, and gardenias
  • Made in California Since 1989: Manufactured and packaged by a family-owned company in Madera, California, and tested by a third-party laboratory for iron content and heavy metals
UPC701748874129
CoverageMedium
Item FormPowder
Unit Count16 Ounce
Item Weight16 ounces
Part NumberTRTAZI11A
ManufacturerGreenway Biotech, Inc.
Mixing Ratio1:0:0
Model NumberTRTAZ11A
Liquid Volume473.18 ml
Target Specieslawn, organic, plant growth
Number of Items1
Specific Uses For ProductLawn,Organic,Plant Growth
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Greenway Biotech Ferrous Sulfate Heptahydrate

As one of the 17 essential plant elements, iron is commonly applied in various lawn, turf and landscape settings. Often, Ferrous Sulfate fertilizer is used to correct Chlorosis (yellowing of the leaves). In the plant, iron plays a role in photosynthetic electron transport, respiration, chlorophyll formation, and numerous enzymatic reactions. Due to its use in chlorophyll formation and photosynthesis, Iron (Fe) is often applied to enhance greening without increasing plant growth.

  • Promotes healthy growth in plants & energy transfers
  • Part of the Enzyme System Needed for Plant Respiration
  • Required for the Formation of Some Proteins as well in Photosynthesis.
  • This product is used in agricultural, lawn and garden and turf management industries.

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Greenway Biotech Ferrous Sulfate Application Rates

Flowers & Vegetables

  • 1/4 to 1/2 lb. per 100 square feet.
  • 1/2 to 1 cup per 100 square feet.

Trees & Shrubs

  • 1/2 to 1 lb. per 100 square feet.
  • 1 to 2 cups per 100 square feet.

*Large Trees:

  • 1/2 cup per 1 inch of diameter.
  • 2 cups per 3 gallons of water for 1000 square feet.

Foliar Application

  • 1 to 2 tbsp. per gallon of water
  • 5 to 8 lb. per 100 gallons of water.

Benefits of Ferrous Sulfate

  • Water Soluble
  • Essential for chlorophyll production.
  • Promotes energy transfers.
  • Required in photosynthesis.
  • Part of the enzyme system needed for plant respiration.
  • Required for the formation of some proteins.
  • Promotes healthy growth in plants.
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How to Apply Greenway Biotech Ferrous Sulfate as a Side Dressing

Pour Ferrous Sulfate onto surface of soil according to the application rate for your type of plant.

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How to Use Greenway Biotech Ferrous Sulfate as a Side Dressing

Mix Ferrous Sulfate thoroughly into soil.

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How to Use Greenway Biotech Ferrous Sulfate as a Side Dressing

Water product thoroughly into soil.

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How to Use Greenway Biotech Ferrous Sulfate for Liquid/Foliar Application

Dissolve Ferrous Sulfate in water according to application rate.

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How to Use Greenway Biotech Ferrous Sulfate for Liquid/Foliar Application

Liquid Application: Pour the Ferrous Sulfate fertilizer solution onto the soil.

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How to Use Greenway Biotech Ferrous Sulfate for Liquid/Foliar Application

Foliar Application: Spray Ferrous Sulfate solution onto plant approximately 6-8 inches from the leaves.

Note: We recommend applying fertilizer early in the morning or late in the afternoon to avoid burning plants.Do not apply when temperatures outside exceed 65 degrees Fahrenheit.

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How to Use Greenway Biotech Ferrous Sulfate for Liquid/Foliar Application

Water plants thoroughly after application

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Application Rates for Ferrous Sulfate to Lower Soil pH

After testing your soil pH level, use the following table to determine how much Dolomite to add to your soil to increase alkalinity.

Our Core Values

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Quality Control

We register all of our products through the California Department of Food and Agriculture (CDFA), ensuring the top quality possible.

CDFA is the highest regulated government agency and we not only meet their requirements, but exceed them. The heavy metal content of our products are either at zero or fall below amounts allowed by CDFA.

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SBA-Certified 8(a) Firm and Minority Owned

We take pride in knowing we are a certified and minority owned small business.

Innovation is not exclusive to just one particular individual, but comes from those of all walks of life and we demonstrate this on a daily basis.

Our small business background is key to the trust we've built with our customers over the years and allows us to remain transparent while embracing community values.

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Sustainability

We understand that we only have one Earth and it's up to us to take care of it!

We're doing our part by offering heavy metal free fertilizers that feed your plants the nutrients they need without harming the environment.

We even carry fertilizers suitable for Hydroponics to encourage fellow gardeners to practice cultivation methods that reduce water usage.

Meanwhile, our high quality, natural supplements encourage a shift away from synthetic medicine and towards a more holistic approach for personal wellness.

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Charitable Contributions

There's no better feeling than giving back to one's community and we decided the best way to do this was by creating our very own non-profit organization, Greenway Foundation.

One percent of all our sales are donated to Greenway Foundation to supply our students with adequate gardening supplies and inspire them to make healthy lifestyle choices by learning basic gardening practices.

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