Boca Hydro Chelated Iron EDDHA 6% Water Soluble Micronutrient

Boca Hydro Chelated Iron EDDHA 6%

For Alkaline and Calcareous Soils – Maximum Iron Availability

Product Description:
Boca Hydro EDDHA Iron 6% is a high-efficiency iron fertilizer specifically formulated for use in alkaline soils and high pH conditions (up to 9.5), where traditional chelates like EDTA or DTPA are ineffective. Featuring 4.8% ortho-ortho isomer, this premium EDDHA chelate ensures superior iron stability and long-lasting plant availability across a wide range of crops.

Ideal for correcting and preventing iron chlorosis in vegetables, citrus, ornamentals, turf, trees, hydroponics, and high-pH irrigation water systems.

Highly stable up to pH 9.5
4.8% ortho-ortho EDDHA isomer
Fully water soluble and safe for all irrigation systems
Suitable for organic-style growing systems (non-synthetic carrier)

Stock Solution (Liquid Concentrate)
Add 200 grams of Boca Hydro EDDHA 6% to 1 gallon of distilled water.
This produces a stock solution with 1.56 grams dry per fl oz or 93.6 ppm Fe per fl oz

1 teaspoon ≈ 4.4 grams
1 tablespoon ≈ 13 grams
1 teaspoon stock solution = 5ml

Foliar
Maintenance 0.25-0.5 grams per gallon. (1 tsp concentrate) 
Deficiency Repair 0.75 grams per gallon. (2 tsp concentrate) 
Surfactant recommended

Pots and Containers
Small Pots  0.5-1 gram per gallon (1-2 tsp concentrate)
Medium Pots 1.5-2 grams per gallon (2-3 tsp concentrate)
Large plants 3 grams per gallon (1-2 tbsp concentrate)

Hydroponics (Use concentrate)
Seedlings 2-3ppm 0.12-0.18 grams per gallon. (1/4 tsp or 1.2ml)
Veg / Flower 3-4ppm 0.18-0.25 grams per gallon. (1/3-1/2 tsp or 1.6-2.1ml)
Heavy Feeding  (Large plants only) 4-5ppm 0.31 grams per gallon. (3/4 tsp or 2.6ml)

Fertigation
2 ppm = 12.6 grams in 1 gallon
3 ppm = 18.9 grams in 1 gallon
4 ppm = 25.2 grams in 1 gallon
5 ppm = 31.5 grams in 1 gallon
Inject at 1:100

Drench (5 gallons of water)
Maintenance    5 grams (2-4 tbsp concentrate)
Heavy Feeding 10  grams (2 tbsp concentrate)
Deficiency Repair 15-20 grams (3-4 tbsp concentrate)

Aquaponics and planted tank Dosing

Iron EDDHA 6% is the preferred, highly stable iron chelate for aquaponics, especially at pH levels over 6.5, keeping iron available to plants without harming fish. 

Standard dosing is 20–30 grams per 1,000 liters (approx. 264 gallons) of system water every 3–4 weeks, or until the light red,tea-colored tint fades. 

Aim for 1-2 ppm iron concentration. 

Target Iron Concentration: 1.0–3.0 mg/L (ppm).

Alternative Small Scale Dose: 1 teaspoon per 100 gallons (378 liters) to start, then test.

Coloration: EDDHA imparts a deep red/purple color to the water, which is normal.

Application Method: Pre-dissolve the powder in a container of water before adding it to the sump tank to ensure even distribution.

System pH: EDDHA is superior for high pH systems (up to pH 10), remaining available where other chelates (like EDTA) fail. Our product will not lower or increase ph.

Observation: Monitor plants for chlorosis (yellowing between leaf veins) in young leaves, which signifies a need for more iron. 

It is recommended to use an iron test kit to maintain a stable, optimal level of 1-3 ppm. 

1ppm Iron in 50 Gallons = 3.15g   ( 0.063 grams (63 mg) Iron EDDHA per gallon )
2ppm Iron in 50 Gallons = 6.30g   ( 0.126 grams (126 mg) Iron EDDHA per gallon )

Normal Systems should be dosed 1ppm once per week.
Deficient Systems should be dosed 2ppm once, then 1ppm next week.

Important Aquaponics Notes ⚠️

EDDHA is stable at high pH, but:

Can stain tanks/media

Persists longer than DTPA

If system pH is below 7.2, DTPA would normally be preferred

Safe for fish at these levels, but don’t stack doses

⚠️ Compatibility & Notes

Ideal pH range for EDDHA 4.5-10

Guaranteed Analysis CAS # 16455-61-1
Iron(EDDHA)................................6%