• Wear chemical-resistant gloves when handling powder or concentrated solutions
• Wear safety glasses or goggles to protect eyes from dust and splashing
• Use a dust mask or N95 respirator when working with dry powder in enclosed spaces
• Wear long sleeves to minimize skin contact
• Wash hands and exposed skin thoroughly with soap and water after handling

• Store in a cool, dry location in the original sealed container
• Keep away from direct sunlight, heat sources, and moisture — product is hygroscopic and will absorb humidity if left open
• Reseal bag tightly after each use; consider transferring to an airtight container after opening
• Keep out of reach of children and pets
• Do not store near food, feed, or potable water supplies

• Do not mix with high-phosphate concentrates — iron can precipitate as iron phosphate in concentrated solutions
• Jar test before tank mixing with copper, zinc, or manganese chelates
• Adjust foliar spray water to pH 6.0–6.5 for optimal iron stability in solution
• Avoid foliar application during peak heat or direct sunlight to prevent leaf burn
• Do not exceed recommended rates — excess chelated iron can interfere with uptake of manganese and zinc
• Rinse spray equipment thoroughly after use

• Eye contact: Flush immediately with clean water for 15 minutes, holding eyelids open. Seek medical attention if irritation or redness persists.
• Skin contact: Wash affected area with soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
• Ingestion: Do not induce vomiting. Rinse mouth with water. Contact Poison Control (1-800-222-1222) or seek immediate medical attention.
• Inhalation: Move to fresh air immediately. If breathing is difficult or symptoms persist, seek medical attention.

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

Iron DTPA uses Diethylenetriaminepentaacetic acid chelation, which binds iron through five coordination sites compared to EDTA's four. This stronger binding maintains iron solubility up to pH 7.5 versus EDTA's limit of pH 6.5. In practice, this means iron DTPA continues delivering available iron in the neutral-to-moderately-alkaline soil conditions common throughout California and the Western US, where EDTA-chelated products become ineffective. If your soil pH is consistently above 6.5, DTPA is the appropriate choice.

The primary signal is interveinal chlorosis — leaves that turn yellow between the veins while the veins themselves stay green — appearing on young leaves first. Iron deficiency is most common in plants growing in alkaline soils (pH above 6.5) or irrigated with high-bicarbonate water. If a soil test confirms adequate total iron but plants still show chlorosis, the iron is present but unavailable due to pH — that's exactly when chelated iron DTPA is needed. If soil pH is below 6.5, Chelated Iron EDTA 13% is a more economical option.

Foliar applications typically show early greening in 7–10 days, with more complete recovery in new growth within 2–3 weeks. Note that older, severely chlorotic leaves often will not regreen — recovery is most visible in new foliage emerging after treatment. Soil drench applications take longer to show results (2–3 weeks) but provide sustained availability for 4–6 weeks. For fastest correction of severe chlorosis, combine a foliar spray for immediate uptake with a soil drench for ongoing availability.

Use the stock solution method to avoid the precision challenges of weighing very small powder amounts. Dissolve 2 oz (57g) in 1 gallon of water to create a ~1,650 ppm Fe concentrate, then dose 1–2 teaspoons of this stock per 10 gallons of reservoir water to target 2–3 ppm Fe in the final solution. Always keep your iron stock tank separate from concentrated calcium or phosphate solutions — mixing these in concentrate form can cause precipitation. Test your reservoir with a ppm meter weekly and replenish as needed.

Yes, with some precautions. Chelated iron DTPA mixes cleanly with calcium nitrate, MAP, MKP, potassium sulfate, and most NPK fertilizers. Always add iron chelate to water first, then add other fertilizers — never add to a concentrated solution. Avoid mixing with high-phosphate concentrates, as iron can form iron phosphate precipitate in concentrated form. If mixing with other micronutrient chelates (copper, zinc, manganese), perform a jar test first: mix small amounts in the same proportions as your intended application and observe for 30 minutes before proceeding.

Plants with the highest iron demand and sensitivity to soil pH include citrus (particularly in Arizona and California), roses, pin oaks, azaleas, rhododendrons, gardenias, petunias, and most berry crops. Hydrangeas, blueberries, and stone fruits are also frequently affected. Any plant grown with alkaline irrigation water is at ongoing risk, since bicarbonates continuously raise rhizosphere pH and reduce iron availability even in soils that test adequate. Preventive DTPA applications before spring growth flush are especially effective for citrus and ornamental trees.

Every batch of Chelated Iron DTPA is independently tested for heavy metal content and verified against label specifications for iron percentage and chelation integrity. Our CDFA registration requires ongoing compliance with California's fertilizer material standards — ensuring you receive a consistent, accurately labeled product.

We stand behind every product we make. If you're not satisfied with your Chelated Iron DTPA for any reason within 90 days of purchase, contact us for a full refund — no questions asked. See our returns policy for details.

Greenway Biotech, Inc. has been producing and distributing specialty fertilizers from California for over 35 years. We manufacture our chelated micronutrients in-house at our Madera, CA facility — giving us direct control over quality at every step from raw materials to final packaging.