Greenway Biotech Ferrous Sulfate
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Greenway Biotech

Greenway Biotech Ferrous Sulfate

4.6

Best high purity iron supplement for organic gardening enthusiasts.

This high-purity mineral supplement provides a rapid solution for iron deficiency in alkaline soils. By delivering iron in a directly absorbable form, it quickly corrects yellowing leaves while simultaneously lowering soil pH to support long-term plant health.

$19.99

In stock

at

Greenway Biotech

Fertilizer Form Water Soluble Powder
Granular
Water Soluble Powder
Plant Type Application Lawn, Vegetables, Flowers, Trees & Shrubs

Who it's for

  • Gardeners needing a fast-acting solution for yellowing leaves
  • Growers cultivating acid-loving plants in alkaline soil
  • Homeowners seeking a lush, moss-free lawn

Who should skip it

  • Users with decorative hardscaping near their application areas
  • Inexperienced gardeners who may struggle with precise dosage
  • People living in humid climates with limited dry storage

Performance breakdown

Chlorosis Correction Speed

Rapidly reverses yellowing leaves by delivering highly bioavailable iron.

Excellent

pH Adjustment Efficacy

Effectively lowers soil alkalinity to support acid-loving plant health.

Excellent

Solubility Performance

Fully dissolves in water, preventing clogged sprayers and uneven application.

Excellent

Moss Control Potency

Aggressively targets and suppresses lawn moss without damaging surrounding grass.

Excellent

Application Versatility

Adapts seamlessly to both foliar sprays and direct soil drenching.

Excellent

Nutrient Concentration

High-purity formula packs significant iron and sulfur in every scoop.

Excellent

Key Specs

Iron Content

20%

Sulfur Content

12%

Solubility

100% Water-soluble

Form

Powder

Certification

CDFA Registered

Origin

Made in Madera, California

Know before you buy

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Greenway Biotech Ferrous Sulfate

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Greenway Biotech
Greenway Biotech
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$19.99
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