Greenway Biotech Ferrous Sulfate
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
at
Greenway Biotech
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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.
pH Adjustment Efficacy
Effectively lowers soil alkalinity to support acid-loving plant health.
Solubility Performance
Fully dissolves in water, preventing clogged sprayers and uneven application.
Moss Control Potency
Aggressively targets and suppresses lawn moss without damaging surrounding grass.
Application Versatility
Adapts seamlessly to both foliar sprays and direct soil drenching.
Nutrient Concentration
High-purity formula packs significant iron and sulfur in every scoop.
Key Specs
Iron Content
20%
Sulfur Content
12%
Solubility
100% Water-soluble
Form
Powder
Certification
CDFA Registered
Origin
Made in Madera, California
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