Chelated Iron DTPA Fertilizer
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Chelated Iron DTPA Fertilizer
Premium chelated iron DTPA 11% for superior performance in alkaline soils up to pH 7.5. This advanced formulation outperforms EDTA chelates in challenging conditions, preventing and correcting iron chlorosis for vibrant, healthy plants. 100% water-soluble for soil, foliar, and hydroponic applications.
Chlorosis Correction Timeline
Day 1
💧
Apply & Absorb
Day 3-5
🌱
Color Change
Day 7-10
🌿
Green Returns
Week 2-3
💚
Full Recovery
Perfect For These Applications
Foliar Spray
1-2 tsp/gallon
Soil Drench
1-2 tbsp/gallon
Alkaline Soil
2-4 lbs/acre
Hydroponics
2-3 ppm Fe
Common Iron Deficiency Problems? We've Got Solutions
😟 Yellow leaves with green veins?
✅ 11% chelated iron restores chlorophyll fast
😟 EDTA failing in alkaline soil?
✅ DTPA stable up to pH 7.5 where EDTA fails
😟 Poor growth and weak plants?
✅ Essential for photosynthesis and energy
😟 Alkaline irrigation water?
✅ DTPA resists bicarbonate precipitation
🔬 Superior pH Stability
DTPA chelation maintains iron availability in soils up to pH 7.5, outperforming EDTA in alkaline conditions
⚡ 11% Chelated Iron
Optimal concentration for rapid chlorosis correction with lower application rates
💧 100% Soluble
Completely dissolves for soil, foliar, fertigation, and hydroponic applications
🔬 Chelate pH Stability Comparison
Choose EDTA for acidic soils (pH < 6.5), DTPA for neutral to moderately alkaline (pH 6.5-7.5), and EDDHA for very alkaline soils (pH > 7.5).
⚠️ Important Application Guidelines
- Apply early morning or evening for foliar spray
- Adjust spray water pH to 6.0-6.5 if alkaline
- Add surfactant for better foliar coverage
- Don't mix with copper or zinc without jar testing first
- Store in cool, dry place away from moisture
Compatibility Guide:
- ✅ Compatible: Calcium nitrate, MAP, MKP, most NPK fertilizers
- ⚠️ Test first: Copper, zinc, and manganese chelates
- ❌ Avoid mixing: High phosphate concentrations in concentrate form
Quick Dosage Guide
Select an application type above
Features & Quality Guarantee
- 11% Chelated Iron: Optimal concentration for efficiency
- DTPA Technology: Superior stability pH 4.0-7.5
- 100% Water Soluble: No residue, complete dissolution
- Extended Availability: Remains active longer than sulfates
- No Soil Tie-Up: Protected from precipitation
- Tank Mix Compatible: Works with most fertilizers (jar test first)
- Professional Grade: Commercial grower quality
- CDFA Registered: California Department of Food & Agriculture
- Made in USA: Manufactured in-house at our California facility
- Heavy Metal Tested: Third-party tested for purity
- 90-Day Guarantee: Full refund if not satisfied
Application Rates & Timing
For severe deficiencies, increase frequency rather than concentration. Always test spray on a few leaves first.
🌱 Soil Application
| Plant Type | Rate | Frequency |
|---|---|---|
| Houseplants (6" pot) | 1-2 tsp per pot | Every 4-6 weeks |
| Garden Vegetables | 1-2 tbsp/gallon | Every 3-4 weeks |
| Shrubs | 2-4 tbsp per plant | 2-3 times/year |
| Trees | 1/4-1 cup per tree | 2 times/year |
| Field Crops | 2-4 lbs/acre | As needed |
🍃 Foliar Application
| Purpose | Rate | Coverage |
|---|---|---|
| Prevention | 1 tsp/gallon | Monthly |
| Mild Chlorosis | 2 tsp/gallon | Every 2 weeks |
| Severe Deficiency | 1 tbsp/gallon | Weekly until corrected |
| Commercial | 1-2 lbs/100 gal | Full coverage |
💧 Hydroponics/Fertigation
Stock Solution Method (Recommended):
Direct measurement of powder for hydroponics can lead to overdosing. Use the stock solution approach:
- Make concentrate: Dissolve 2 oz (57g) in 1 gallon of water → ~1,650 ppm Fe stock
- Add 1-2 tsp stock solution per 10 gallons reservoir water
- Target: 2-3 ppm Fe (never exceed 5 ppm)
- Test with EC meter and adjust as needed
| Crop Type | Target ppm Fe | Notes |
|---|---|---|
| Leafy Greens | 2-3 ppm | Lower end of range |
| Tomatoes/Peppers | 2-4 ppm | Increase at fruiting |
| Strawberries | 3-4 ppm | Critical for flavor |
| Herbs | 2-3 ppm | Standard range |
🌾 High-Risk Crops (Alkaline Soils)
| Crop Type | Sensitivity | Special Notes |
|---|---|---|
| Citrus | Very High | Apply before spring flush |
| Roses | High | Monthly during growing season |
| Pin Oak | Very High | Inject or deep root feed |
| Berries | High | Critical at fruit set |
| Tomatoes | Moderate | Apply at first flower |
Chelated Iron DTPA Calculator
Compare Iron Chelates – Which One to Choose?
| Feature | Iron DTPA | Iron EDTA | Iron EDDHA | Iron Sulfate |
|---|---|---|---|---|
| Iron % | 11% | 13% | 6% | 20% |
| pH Stability | 4.0-7.5 | 4.0-6.5 | 4.0-9.0 | Below 6.0 |
| Water Solubility | 100% | 100% | 100% | Moderate |
| Best For | Alkaline soils | Acidic soils | Very alkaline | Acidic only |
| Cost | Moderate | Low | High | Very Low |
| Longevity | Long | Medium | Very Long | Short |
Quick Reference Guide
📋 Application Quick Reference
Foliar:
1-2 tsp/gallon
Spray weekly if deficient
1-2 tsp/gallon
Spray weekly if deficient
Soil Drench:
1-2 tbsp/gallon
Every 3-4 weeks
1-2 tbsp/gallon
Every 3-4 weeks
Field Crops:
2-4 lbs/acre
As needed
2-4 lbs/acre
As needed
Hydroponics:
Stock solution method
Target 2-3 ppm Fe
Stock solution method
Target 2-3 ppm Fe
Documents
Frequently Asked Questions
What is chelated iron DTPA and why is it better than EDTA?
Iron DTPA uses Diethylenetriaminepentaacetic acid chelation, providing stability up to pH 7.5 versus EDTA's pH 6.5 limit. This makes DTPA ideal for moderately alkaline soils common in Western states. It's 3-5x more effective than iron sulfate and remains available even with alkaline irrigation water.
When should I use DTPA instead of EDTA?
Use DTPA when: soil pH is above 6.5, irrigation water is alkaline (contains bicarbonates), you're in areas with naturally high pH soils, or EDTA products have failed to correct chlorosis. DTPA is the sweet spot between EDTA (pH 6.5) and expensive EDDHA (pH 9.0).
How do I apply iron DTPA for best results?
Foliar spray gives fastest results (7-10 days): Mix 1-2 tsp/gallon for prevention, 1 tbsp/gallon for severe deficiency. Apply early morning or evening. Soil drench lasts longer: Apply 1-2 tbsp/gallon around root zone. Best to combine both methods for immediate and sustained control.
Which plants need iron DTPA most?
High-risk plants include: citrus (very susceptible), roses, pin oaks, azaleas, berries, petunias, and many vegetables. Any plant grown with alkaline irrigation water needs regular iron DTPA, as bicarbonates continuously raise soil pH and lock up iron.
How fast will I see results?
Foliar applications show greening in 7-10 days. Soil applications take 2-3 weeks but last 4-6 weeks. For severe chlorosis, use foliar for quick correction plus soil application for sustained control. Continue applications until new growth is fully green.
What's the best way to use this for hydroponics?
Use the stock solution method: Dissolve 2 oz (57g) in 1 gallon of water to make a concentrate (~1,650 ppm Fe). Then add 1-2 teaspoons of this stock per 10 gallons of reservoir water to achieve 2-3 ppm. This prevents overdosing since direct powder measurement is impractical for the small amounts needed.