Iron Sulfate 20 (50 lb)

A robust iron fertilizer, this iron sulfate 20 for plants is a high-quality, water-soluble formulation of ferrous sulfate for plants, also known as ferrous sulfate fertilizer. Perfect for addressing iron and sulfur deficiencies in gardens, lawns, and crops—especially in high pH soils.

Key Features: 

• Guaranteed Analysis: 20% Iron (Fe), 11% Sulfur
• Comes as a 50 lb bag—ideal bulk packaging for use across larger areas
• Increases availability of iron to support chlorophyll production and proper photosynthesis, helping correct iron chlorosis
• Helps acidify alkaline soils, aiding acid-loving species like azaleas, rhododendrons, and blueberries
• Contains sulfur, a critical secondary nutrient for protein and amino acid synthesis
• Effective as a moss control agent for turf—promotes a lush, moss-free lawn when applied properly

Application & Usage:

• Use Rate: Broadcast at 20–100 lb/acre, based on soil needs
• Methods of Application:
  • Soil Amendment: Apply directly to soil or planting holes
  • Foliar Spray: Dissolve in water for quicker uptake
  • Lawn Moss Control: Spread over affected areas and water in to activate
• Note: Avoid contact with porous surfaces (concrete, wood, metal) as the product can stain when wet
• Tip: Always perform a soil test to determine precise needs before applying

Benefits at a Glance:

• Supplies essential iron and sulfur for vibrant plant health
• Provides a reliable source of iron sulfate fertilizer for varied uses—from lawns to orchards
• Enhances nutrient uptake and improves soil structure
• Convenient bulk-sized iron sulfate for sale in a 50 lb format

Technical Note for Agricultural Use:

This product contains ferrous sulfate heptahydrate and is compatible with most fertilizers. Always conduct a soil test and compatibility check before mixing with other inputs. Ideal for both soil and foliar applications. Handle with protective gear and avoid direct contact with porous materials.

Looking for more options that enrich soil with essential nutrients? Browse our full range of iron fertilizer products and fertilizers with sulfur.

⚠ Warning: This product or its packaging has a CA Prop 65 Warning

California Proposition 65 WARNING: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm; for more information, visit www.P65Warnings.ca.gov.

Compare this product with additional nutrient-specific fertilizers selected for garden and farm fertility programs.