• Guaranteed Analysis
Total Nitrogen (N) 15%
Nitrate nitrogen (N-NO3) 10.9%
Ammoniacal nitrogen (N-NH4) 4.1%
Available Phosphate (P205) 3%
Soluble Potash (K20) 25%
Magnesium (Mg) 3.4%
Water soluble 3.4%
Sulfur (S) 4.4%
Iron (Fe) 0.15%
Manganese (Mn) 0.04%
Chelated by EDTA 0.04%
Boron (B) 0.02%
Copper (Cu) 0.019%
Water soluble 0.019%
Molybdenum (Mo) 0.0070%
Zinc (Zn) 0.037%
Chelated by EDTA 0.037%

Product Code


Peters Professional® Peat-Lite 15-3-25 Flowering Crop Special + black Iron

15-3-25 Flowering Crop Special + black Iron


  • Advantages
  • Directions for use
  • Suggested Application Rates

New extra-iron formula for plants like petunias that thrive in growing media with lower pH.

  • B (Base) formulation can be used alone or rotated with a C (Customizing) component
  • Effective for all Water Types
  • Contains Iron HBED, DTPA, EDTA with extra magnesium plus a full range of essential micronutrients
  • Contains elevated levels of Magnesium to improve the Calcium/Magnesium ratio in hard water environments
Directions for use
  • Verify your product analysis and rate for your plants in your production system. For further guidance contact your local ICL Specialty Fertilizer Territory Manager or call ICL Specialty Fertilizer Customer Service at 800-492-8255.
  • Rate tables are printed on bag labels and can be found on product information sheets as well as on www.icl-sf.com.
  • Irrigation frequency and volume should be adjusted during the crop production cycle according to crop type, environmental conditions and desired soluble salt levels.
  • Constant feeding with your irrigation is our normal recommendation for feeding with water soluble fertilizers.
  • A product trial is recommended before adopting a new fertilizer program or making full-scale changes to standard cultural practices. Test several rates on representative plant types.
  • Product storage: Store in a clean, cool, dry place.  Re-seal opened bags by folding top down and securing.
Suggested Application Rates


Weight (In Ounces) Of Product Needed To Mix One U.S. Gallon Of Concentrate

Target Fertilizer
Concentration (ppm N)
After Dilution

Injector Ratios

EC mmhos/cm of
Target Feed Rate After Dilution

1:15 1:100 1:200
50 0.7 4.5 9.0 0.49
100 1.4 9.0 18.0 0.98
200 2.7 18.0 36.0 1.96
300 4.1 27.0 ***



Gallons Of Water Required To Dissolve One 25 Lb Bag Of Fertilizer

Target Fertilizer Concentration
(ppm N) After Dilution

Injector Ratios
1:100 1:200
50 592.6 44.4
100 296.3 22.2
200 148.1 11.1
300 98.8 ***

For a complete list of target concentrations (ppm N), please refer to the Product Information Sheet.

Mixing for watering cans, spray tanks (no injectors)

Amount of Fertilizer       +       Amount of water (gallons)  =       Approximate ppm N
1 tsp. 1 232
1 tbsp. 2 347
1 cup 25 445


Click for Product Sheet

Peters Professional® Flowering Crop Special with black Iron is a formulation of three chelated Irons, including black Iron. This new M-77® chelated system is specifically designed for petunias and other high Iron demanding plants.

Black Iron is the strongest iron chelate used for growing ornamentals, making iron available to plants over the widest range of pH.


Suggested period of use

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
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  • Aug
  • Sep
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