Chelated Copper EDTA Fertilizer - 14% Cu
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Chelated Copper EDTA Fertilizer
Premium chelated copper with 14% Cu-EDTA for superior bioavailability. EDTA chelation ensures stability across pH 4–9, delivering 3–5× better absorption than copper sulfate. CDFA registered, independently tested for heavy metals.
Ideal Applications
FEATURES
🛡️ 14% Chelated Copper
High copper concentration means lower application rates and more efficient correction of deficiencies compared to dilute copper sources.
⚡ EDTA Chelation Technology
Ethylenediaminetetraacetic acid protects copper ions from soil tie-up, maintaining plant availability across pH 4–9 where copper sulfate fails above 6.5.
💧 100% Water Soluble
Dissolves completely with zero residue for soil drench, foliar spray, fertigation, and hydroponic applications without clogging equipment.
🔬 3–5× Better Absorption
EDTA chelation delivers dramatically superior bioavailability versus copper sulfate because chelated copper enters root cells with less metabolic energy.
🌿 Essential Enzyme Activator
Copper activates over 30 plant enzymes involved in photosynthesis, respiration, lignin biosynthesis, and phenol metabolism critical for healthy growth.
🌾 Strengthens Cell Walls
Promotes lignification for stronger stems, reducing lodging in grain crops and improving structural integrity in trees and vines.
🧪 Tank Mix Compatible
EDTA chelation prevents precipitation with phosphates and carbonates, allowing safe mixing with most fertilizers and crop protection products.
📋 CDFA Registered
Registered with the California Department of Food and Agriculture and manufactured at our California facility with strict quality controls.
🔍 Tested for Heavy Metals
Every batch undergoes independent third-party laboratory testing for heavy metal content, with results consistently well below required regulatory limits.
🌱 Multi-Application Versatility
Effective for soil broadcast, banding, foliar spray, drip fertigation, hydroponic reservoirs, and individual tree treatment — one product for every growing method.
DERIVED FROM
This single-ingredient chelated micronutrient is manufactured from high-purity raw materials chosen for maximum solubility and plant uptake.
Active Ingredient
Related Copper Sources
SCIENCE BEHIND THE FORMULA
14% Cu-EDTA: Engineered for Maximum Plant Availability
Copper is an essential micronutrient required in small but critical amounts for photosynthesis, enzyme activation, and structural integrity. The EDTA chelation shell keeps copper soluble and plant-available even in high-pH soils where unchelated copper precipitates as insoluble hydroxides and carbonates.
🔗 Copper (Cu) — 14%
The sole active nutrient, delivered at the highest commercially practical EDTA-chelated concentration. Copper is immobile in plants, so continuous availability from the root zone is essential for new growth.
🧬 EDTA Chelation Agent
The synthetic chelator forms a stable six-coordinate complex with Cu²⁺, preventing fixation by soil carbonates, phosphates, and organic matter while allowing controlled release at root surfaces.
Why Chelated Copper?
🌿 Chlorophyll Production
Copper is essential for plastocyanin — a protein in the electron transport chain that drives photosynthesis. Deficient plants show characteristic pale young leaves because chlorophyll synthesis stalls.
🏗️ Lignin Biosynthesis
Copper-containing laccase enzymes polymerize lignin, the structural polymer that stiffens cell walls. Without adequate copper, stems weaken and crops are prone to lodging.
🛡️ Disease Resistance
Copper activates polyphenol oxidase and other defense enzymes. Adequate copper nutrition reduces susceptibility to fungal and bacterial pathogens by strengthening physical and chemical barriers.
🌸 Pollen Viability
Copper plays a critical role in pollen development and grain fill. Deficiency causes delayed flowering, poor pollination, and significant yield reduction in grain and fruit crops.
APPLICATION RATES & DIRECTIONS
Always conduct soil or tissue tests to determine actual copper needs before application. Below are general guidelines for Chelated Copper EDTA 14%.
Soil Application
| Crop Type | Rate | Notes |
|---|---|---|
| Vegetables | 2–4 lbs/acre | Apply pre-plant or side-dress |
| Field Crops | 2–4 lbs/acre | Broadcast or band |
| Trees & Vines | 2–5 lbs/acre | Apply to root zone |
| Turf | 0.5 lb/1,000 sq ft | Water in thoroughly |
Foliar Application
| Crop | Rate | Notes |
|---|---|---|
| Citrus/Nuts (hardy) | 1–1.5 lbs/acre | 25+ gal water/acre |
| Trees/Vines | 0.75–1.5 lbs/acre | 25+ gal water/acre |
| Vegetables (sensitive) | 0.5–1 lb/acre | Use lower rate to avoid phytotoxicity |
| Turf | 1 tbsp/1,000 sq ft | Thorough coverage |
Hydroponics & Fertigation
| Step | Instructions |
|---|---|
| 1. Make Stock Solution | Dissolve ½ cup (115g) in 1 gallon of water — creates ~4,250 ppm Cu concentrate |
| 2. Apply to Reservoir | Use ½–1 teaspoon of stock per 100 gallons — achieves 0.05–0.10 ppm Cu |
| 3. For Higher Rates | Use 1½ teaspoons per 100 gallons — achieves ~0.15 ppm Cu |
Target ranges: 0.05 ppm (maintenance) · 0.10 ppm (standard) · 0.15–0.20 ppm (deficiency correction)
Individual Trees
| Tree Size | Rate per Inch | Annual Maximum |
|---|---|---|
| Young (1–3″) | 0.5 oz/inch | 2 oz total |
| Medium (4–8″) | 1 oz/inch | 8 oz total |
| Large (9″+) | 1.5–2 oz/inch | 20 oz total |
HOW TO USE
Soil & Container Growing
- Determine copper needs through soil or tissue analysis
- Calculate the correct rate based on crop type and area (see Application Rates or use the calculator)
- For broadcast: spread evenly across the soil surface and incorporate lightly
- For banding: apply in a band 2–3 inches to the side and below the seed row
- Water thoroughly after application to move copper into the root zone
Foliar Spray
- Dissolve the measured amount in the required volume of water (minimum 25 gallons per acre)
- Spray early morning or late evening to minimize leaf burn risk
- Ensure thorough, uniform coverage of all foliage
- Do not apply during bloom on sensitive crops
- Repeat every 2–3 weeks if deficiency symptoms persist
Hydroponic Systems
- Prepare a stock solution: dissolve ½ cup (115g) in 1 gallon of clean water
- Add ½–1 teaspoon of stock solution per 100 gallons of reservoir water
- Test copper levels with a reliable meter or test kit — target 0.05–0.10 ppm for most crops
- Increase to 1½ teaspoons per 100 gallons only for confirmed deficiency correction (0.15 ppm)
- Monitor closely — copper toxicity occurs at relatively low concentrations
Mixing Instructions
- Fill tank 2/3 with water before adding any products
- Add Chelated Copper EDTA and agitate until fully dissolved
- Continue filling while agitating
- Add other products last if tank mixing
Pro Tip: Stock Solution for Precision Dosing
For hydroponic and fertigation applications, always pre-mix a concentrated stock solution (½ cup / 115g per gallon of water = ~4,250 ppm). This eliminates the need to weigh sub-gram amounts of dry powder — a single measured teaspoon of stock solution delivers a precise, consistent copper dose every time.
When Chelated Copper EDTA Is the Right Choice
- Soil pH is above 6.5 and copper sulfate precipitates before reaching the root zone
- You need precise dosing for hydroponics or recirculating fertigation systems
- You're correcting active deficiency symptoms on new growth (chlorosis, tip dieback, twisted leaves)
- You want a single copper source compatible with foliar, soil, and drip irrigation programs
When to Consider Other Options
- Soil pH is consistently below 6.5 and you need a low-cost copper source — Copper Sulfate is an economical alternative
- You need copper for algae control, moss treatment, or fungal disease suppression — Copper Sulfate is more appropriate for these uses
- You are in certified organic production — EDTA is a synthetic chelant and is not OMRI-approved; consult your certifier for approved copper sources
CHELATED COPPER CALCULATOR
SAFETY & HANDLING
Personal Protective Equipment (PPE)
- Wear chemical-resistant gloves and safety goggles when handling dry powder or concentrated solutions
- Avoid inhaling dust — use in well-ventilated areas or wear a NIOSH-approved dust mask when measuring
- Wash hands and exposed skin thoroughly after handling
- Remove and wash contaminated clothing before reuse
Storage Guidelines
- Store in a cool, dry place in the original sealed container
- Product is hygroscopic — it will absorb moisture from the air if exposed
- Keep out of direct sunlight and away from heat sources
- Keep away from children, pets, and livestock (especially sheep)
Application Precautions
- Always conduct a soil or tissue test before application — copper accumulates in soil and excess is toxic
- Do not exceed recommended rates — copper toxicity is difficult to reverse
- Avoid application during bloom on sensitive crops
- Perform a jar test before tank mixing with new products
- Do not mix with highly alkaline products (pH >10) or high-calcium solutions
- Do not apply in areas where sheep graze — copper is highly toxic to sheep
First Aid
- Eye contact: Flush with clean water for 15 minutes. Remove contact lenses if present. Seek medical attention if irritation persists
- Skin contact: Wash affected area thoroughly with soap and water
- Ingestion: Do not induce vomiting. Contact Poison Control (1-800-222-1222) or seek medical attention immediately
- Inhalation: Move to fresh air immediately. Seek medical attention if breathing difficulty persists
Refer to the Safety Data Sheet (SDS) for complete safety information.
COMPLETE YOUR SYSTEM
Copper works alongside other essential micronutrients for complete plant nutrition. These complementary products address the full spectrum of trace element needs.
Chelated Iron EDTA 13%
Corrects iron chlorosis — interveinal yellowing on new growth. Essential partner for complete micronutrient programs.
Chelated Manganese EDTA
Activates photosynthesis enzymes and supports chloroplast function. Critical for soybeans, palms, and pecans.
Chelated Zinc EDTA
Drives auxin production and protein synthesis. Prevents stunted growth and small leaves in corn, pecans, and citrus.
Boric Acid (17% Boron)
Essential for cell wall formation, pollination, and fruit set. Critical micronutrient often deficient in sandy and alkaline soils.
Sodium Molybdate (39% Mo)
Enables nitrogen fixation in legumes and activates nitrate reductase. Required in trace amounts for all crops.
Copper Sulfate Crystals
Non-chelated copper alternative for algae control, moss treatment, and acidic soil applications where chelation is unnecessary.
FREQUENTLY ASKED QUESTIONS
What is chelated copper EDTA?
Chelated copper EDTA is copper bonded with EDTA (ethylenediaminetetraacetic acid), creating a protected form that remains available to plants across pH 4–9. The chelation shell prevents copper from reacting with soil carbonates, phosphates, and organic matter — delivering 3–5× more effective absorption than unchelated copper sulfate. For a deeper comparison, see our article on Sulfate vs Chelated Fertilizers: Key Differences and Garden Benefits Explained.
How do I know if my plants need copper?
Copper is immobile in plants, so symptoms appear on new and young growth first while older leaves remain green. Look for: young leaves turning pale green or yellow (chlorosis), twisted or malformed new growth, dieback of growing tips, weak stems, delayed maturity, and increased disease susceptibility. Soil tests below 0.2 ppm or tissue tests below 5 ppm indicate deficiency. For a visual guide to identifying micronutrient problems, see our guide to Essential Micronutrients: Boost Your Garden Soil for Healthier Plants.
Why is EDTA chelation better than copper sulfate?
EDTA chelation provides pH stability across 4–9 (vs. 6.5 for sulfate), prevents precipitation with phosphates in the soil solution, delivers 3–5× better plant absorption, maintains longer availability in the root zone, offers superior tank mix compatibility, and carries lower phytotoxicity risk than sulfate forms.
What's the application rate for hydroponics?
Use the stock solution method: dissolve ½ cup (115g) in 1 gallon of water, then add ½–1 teaspoon of this concentrate per 100 gallons of reservoir water to achieve 0.05–0.10 ppm copper. Direct measurement of dry powder is impractical because the amounts needed are extremely small (less than 0.3 grams per 100 gallons). Use the calculator on this page for precise dosing.
Can I mix it with other fertilizers?
Yes — EDTA chelation makes this product compatible with most fertilizers. Always jar test new combinations first. Fill your tank 2/3 with water, dissolve the copper EDTA first, then add other products. Do not mix with highly alkaline products (pH >10) or high-calcium solutions, as these can destabilize the chelate.
Is this product safe for all livestock?
No — copper is highly toxic to sheep. Do not apply in areas where sheep graze, and prevent runoff into sheep pastures. Cattle and other livestock have higher copper tolerance but should not have direct access to treated areas until product is watered in and dry.
Is this product organic?
EDTA is a synthetic chelating agent, so this product is not OMRI-listed for certified organic production. For organic operations, consider copper sulfate (with restrictions) or other approved copper sources. This product is excellent for conventional, hydroponic, and IPM programs.
What role does copper play in plant health?
Copper is essential for photosynthesis (plastocyanin protein), lignin biosynthesis (strong cell walls), enzyme activation (over 30 copper-dependent enzymes), pollen viability, and disease resistance. Despite being needed in small amounts, even mild copper deficiency significantly reduces crop quality and yield. Learn more in our article on 7 Ways Copper Sulfate Boosts Garden Health and Productivity.
GROW WITH CONFIDENCE
When you choose Greenway Biotech, you're choosing a company with over 35 years of experience in plant nutrition and a commitment to quality at every step.
Product Quality Guaranteed
- Manufactured at our California facility from high-purity raw materials
- Every batch independently tested by third-party laboratories for purity and potency
- Registered with the California Department of Food and Agriculture (CDFA)
- Rigorously tested for heavy metal content with results consistently well below required limits
- 14% guaranteed copper analysis verified by independent laboratory assay
Hassle-Free Return Policy
If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund. No questions asked.
Environmental Responsibility
We're committed to sustainable agricultural practices, including:
- Recyclable packaging materials
- Precise chelated formulation reduces environmental impact by requiring lower application rates than unchelated copper
- Support for integrated pest management (IPM) practices
- Promoting efficient nutrient delivery to minimize runoff
Charitable Contributions
1% of all profits go to our foundation, focused on improving educational opportunities for children in agricultural communities.
DOCUMENTS
DISCOVER MORE
- Sulfate vs Chelated Fertilizers — Learn the key differences in bioavailability, pH stability, and when to use each form
- Essential Micronutrients — Comprehensive guide to copper, iron, zinc, manganese, boron, and molybdenum in plant health
- 7 Ways Copper Sulfate Boosts Garden Health — Explore copper's role as a fungicide, bactericide, soil amendment, and more
HAVE QUESTIONS?
Check out our full FAQ page or contact our experts for personalized advice.