EDDHA & EDTA Chelates
High-stability chelated micronutrients for agriculture — EDDHA-Fe 6% with o,o-4.8% isomer content for calcareous and alkaline soils, plus a full EDTA series (Fe / Zn / Mn / Cu / Ca / Mg).
The Problem
Iron deficiency in
high-pH soils
In calcareous and alkaline soils (pH > 7), iron applied as inorganic salts (e.g. ferrous sulfate) rapidly converts to insoluble forms that crops cannot absorb. Chlorosis in fruit trees, vines and horticultural crops is the visible symptom.
Chelation keeps iron and other micronutrients in solution and available to the plant. The strength of the chelate determines how well it holds at high pH:
| Chelate type | Stability range | Best suited for |
|---|---|---|
| EDTA-Fe (13%) | Stable up to ~pH 6.5 | Acidic–neutral soils, foliar, hydroponics |
| EDDHA-Fe 6% (o,o 4.8%) | Stable up to pH 9–11 | Calcareous / alkaline soils, fruit trees |
Chelation
Keeps metals in solution
Uptake
Available to leaf & root
Alkaline soils
Holds at high pH
Stability at a glance
pH 4
EDTA-Fe
holdsup to ~6.5
EDDHA-Fe
holdsup to 9–11
pH 11
EDDHA-Fe 6%
Flagship chelate
Full TDS with model number, complete indicators and packing available on request.
| Item | Spec |
|---|---|
| Fe chelated | 6% 【待确认】 |
| o,o-EDDHA isomer | 4.8% 【待确认】 |
| Appearance | 【待确认】 |
| Solubility | 【待确认】 |
| pH / moisture / particle size | 【待确认】 |
EDTA Series
The full micronutrient set
Content values follow industry-typical framework — confirmed per company TDS before order.
| Product | Content | Form |
|---|---|---|
| EDTA-Fe | Fe 13% | Powder / micro-granule |
| EDTA-Zn | Zn 15% | Powder |
| EDTA-Mn | Mn 13% | Powder |
| EDTA-Cu | Cu 15% | Powder |
| EDTA-Ca | Ca 10% | Powder |
| EDTA-Mg | Mg 6% | Powder |
Why Amino Acids
Right chelate,
right program
EDDHA-Fe: soil application / fertigation around the root zone; fruit trees & vines 10–30 g per tree per application【剂量待确认】. EDTA series: foliar, fertigation and hydroponic programs.
Tell us your soil pH and crop
