How EDDHA Fe 6% Chelated Iron Solves Iron Deficiency in Plants

Introduction to EDDHA Fe 6%
EDDHA Fe 6% is a highly effective iron chelate fertilizer used to correct and prevent iron deficiency (chlorosis) in plants, especially in alkaline and calcareous soils. The chelating agent EDDHA (ethylenediamine-N,N′-bis(2-hydroxyphenylacetic acid)) ensures maximum stability and iron availability over a wide pH range, making it one of the most reliable iron fertilizers for agriculture and horticulture.

Chemical Structure and Chelation Stability
EDDHA Fe 6% consists of 6% water-soluble iron (Fe), fully chelated with the EDDHA molecule. Its strongest isomer, ortho-ortho, is highly stable even in pH levels from 4 to 11. This allows iron to remain soluble and bioavailable in soils where traditional iron sources like ferrous sulfate quickly become inactive due to precipitation.

Function and Importance in Plant Growth
Iron is essential for chlorophyll synthesis and overall plant metabolism. Without sufficient iron, plants suffer from interveinal chlorosis, especially in young leaves. EDDHA Fe 6% rapidly corrects these symptoms and promotes healthy, green, and vigorous plant growth. It supports key physiological processes, including photosynthesis, respiration, and nitrogen assimilation.

Applications in Agriculture and Horticulture
EDDHA Fe 6% is widely used on crops sensitive to iron deficiency, including citrus, grapes, berries, ornamentals, soybean, corn, and vegetables like lettuce and tomato. It can be applied via soil drenching, fertigation, or drip irrigation systems. It is especially effective in high-pH soils where other iron sources fail to perform.

Key Benefits of EDDHA Fe 6%

• High iron availability: Works even in calcareous and alkaline soils.

• Fast correction of chlorosis: Quickly improves plant appearance and health.

• Long-lasting effect: Chelation prevents iron from binding with soil particles.

• Compatible with fertigation systems: Easily soluble and stable in irrigation water.

Usage and Dosage Guidelines
Typical dosage ranges from 1–5 kg per hectare, depending on crop type and deficiency severity. For localized treatment, 5–10 grams per plant is often sufficient. It's advisable to apply early in the growing season and repeat based on symptoms or as per soil test results. Always follow product label and regional agricultural guidelines.

Environmental and Safety Aspects
EDDHA Fe 6% is environmentally friendly and safe for soil and groundwater. It is non-toxic to humans and animals when used correctly. However, as with any agricultural input, protective gloves and proper storage are recommended.

FAQ About EDDHA Fe 6%

Q1: Why choose EDDHA Fe over EDTA or DTPA chelates?
EDDHA Fe remains stable at higher pH levels (up to 11), while EDTA and DTPA lose effectiveness above pH 6.5–7.5. This makes EDDHA ideal for alkaline soils.

Q2: What is the difference between ortho-ortho and ortho-para isomers?
The ortho-ortho isomer provides the highest stability and efficiency in chelation. Products with high ortho-ortho content are more effective in challenging soil conditions.

Q3: Can I use EDDHA Fe 6% with other fertilizers?
Yes, it is compatible with most water-soluble fertilizers and micronutrients. However, avoid mixing with phosphates in concentrated form to prevent precipitation.

Q4: How fast does it work?
Visible improvement in leaf color can be seen within 5–10 days after application, depending on the severity of deficiency and environmental conditions.

Q5: Is EDDHA Fe 6% safe for hydroponic systems?
Yes, it can be used in hydroponic systems, especially when the nutrient solution pH is above 6.5, where traditional iron sources are less effective.