• Wear chemical-resistant gloves when measuring or mixing
• Wear eye protection (safety glasses or goggles) to prevent dust contact
• Use a dust mask or N95 respirator in poorly ventilated areas when handling dry powder
• Wash hands thoroughly with soap and water after handling
• Change contaminated clothing before re-entering living areas

• Store in a cool, dry place in the original sealed container
• EDTA iron powder is hygroscopic — moisture causes caking. Keep tightly sealed when not in use
• Keep away from direct sunlight and heat sources above 85°F
• Store away from children and pets
• Do not store near food, feed, or drinking water

• Never apply foliar sprays when temperatures exceed 85°F — risk of leaf burn
• Do not apply to stressed or drought-wilted plants — water before and after application
• High concentrations may cause temporary leaf discoloration in sensitive plants — test first
• Avoid direct contact with eyes, skin, or clothing during mixing
• Do not allow solution to enter storm drains, waterways, or drainage ditches
• EDTA is not effective above pH 7.0 — verify soil pH before application to ensure results

• 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. Seek attention if irritation develops
• Ingestion: Do not induce vomiting. Rinse mouth with water. Contact Poison Control (1-800-222-1222) or seek medical attention immediately
• Inhalation: Move to fresh air. Seek medical attention if coughing, dizziness, or breathing difficulty persists

Refer to the Safety Data Sheet (SDS) for complete safety information.

Iron EDTA uses ethylenediaminetetraacetic acid (EDTA) to form a protective "cage" around iron ions. This chelation prevents iron from reacting with calcium, phosphates, and carbonates in the soil — reactions that quickly render unchelated iron insoluble and unavailable to plants. The chelated iron molecule stays dissolved in soil water until a plant root releases a natural acid that exchanges the iron from the chelate for uptake. EDTA chelation is effective in soils with pH between 4.0 and 7.0 — the range covering most home gardens, raised beds, and hydroponic systems. Learn more about essential micronutrients and how chelation works.

Choose EDTA when your soil or media pH is between 4.0 and 7.0 — this is the most common range for home gardens, lawns, and container plants. EDTA is the most cost-effective chelate and carries the highest iron concentration (13%). If your soil pH is 7.0–7.5, switch to Iron DTPA 11%. For very alkaline soils above pH 7.5 — common in parts of the Southwest and on calcareous soils — use Iron EDDHA, the only chelate stable enough for that range. When in doubt, test your soil pH first with a digital meter or test kit.

Foliar applications typically show the first signs of greening in 3–5 days, with significant visible improvement in 7–14 days. New growth will emerge green, though severely chlorotic older leaves may not fully recover — the recovery indicator to watch is new leaf color. Soil applications take 2–3 weeks for visible results but provide longer-lasting correction (3–4 weeks). For severe chlorosis, apply foliar spray weekly until new growth is consistently green, then reduce to monthly maintenance. Results vary with temperature, application method, and how long the deficiency has persisted.

Use the stock solution method for accurate dosing: Dissolve 2 oz (57g) in 1 gallon of water to make a concentrate of approximately 1,900 ppm Fe. Then add 1–2 teaspoons of this stock per 10 gallons of reservoir water to achieve 2–5 ppm Fe in the nutrient solution. This eliminates the guesswork of measuring tiny powder quantities. Maintain your reservoir pH at 5.5–6.5 — EDTA begins to break down above pH 7.0. If your system tends to run higher, consider Iron DTPA for more consistent results. See our complete guide to hydroponic fertilizers.

Yes, when used as directed. Iron EDTA is widely used in commercial vegetable and fruit production and is approved for use on edible crops. Our product is independently tested for heavy metal content. Apply to the root zone rather than directly onto edible portions close to harvest. Follow all label directions and observe pre-harvest intervals where specified.

Iron sulfate requires very acidic conditions (below pH 6.0) to remain plant-available. In neutral or slightly alkaline soils — extremely common in many parts of the country, especially in the West — iron sulfate oxidizes and precipitates within hours of application. Chelated Iron EDTA solves this by protecting the iron from that reaction, keeping it available for uptake through the full pH 4.0–7.0 range. If your soil pH is above 7.0, neither iron sulfate nor EDTA will work well — you'll need Iron DTPA or Iron EDDHA. Read: Sulfate vs. Chelated Fertilizers — Key Differences Explained.

Yes. Iron EDTA is compatible with most NPK fertilizers, calcium nitrate, magnesium sulfate, and most micronutrient solutions in dilute form. Use caution when mixing with copper or zinc chelates in concentrated stock solutions — jar test first. Avoid combining with high-phosphate concentrates in stock solutions, as precipitation can occur. Always make final dilute working solutions before mixing, and use within 24 hours of preparation.

Every batch of Chelated Iron EDTA 13% is independently tested for heavy metal content and verified for iron concentration before packaging. We maintain complete product documentation including Safety Data Sheets and CDFA registration certificates, available upon request.

90-day money-back guarantee. Not fully satisfied with your results? Return for a full refund, no questions asked. We've stood behind this policy since 1989. Visit our Returns & Shipping page for details.

• Precision chelated formulation reduces total product needed per application versus non-chelated alternatives
• Recyclable packaging — resealable bags minimize product waste
• No unnecessary fillers, carriers, or additives
• Packaged in our Madera, CA facility in the heart of the San Joaquin Valley

Family-owned since 1989, Greenway Biotech has packaged and distributed premium fertilizers from California for over 35 years. Our Madera, CA facility is located in the heart of the San Joaquin Valley — surrounded by the agricultural customers whose needs drive our product standards. We serve both commercial growers and serious home gardeners.