19-11-21 Multi-Purpose with Black Iron

Contains three chelated irons, including black iron—the most effective for growing ornamentals

19

N

11

P2O5

21

K2O
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Peters Excel pHLow 19-11-21 Multi-Purpose is a versatile, multi-use formulation that provides the nutrition plants need to thrive while effectively managing irrigation water alkalinity.

  • Base formulation—can be used alone or rotated with a customizing component
  • No filler substances
  • Effective for water types 2, 3 and 4
  • Elevated levels of chelated trace elements ensure robust growth and rich color
  • Contains NPK, magnesium and micronutrients
  • Developed for peat-based cultures (pot plants, bedding plants, and container nursery stock)
  • Exclusive M-77® with black iron chelating formula for fast, efficient nutrient uptake

Concentration (ppm N) fertilizerAverage alkalinity reduction (ppm total alkalinity)
10020
20040
30050
40070

 

 

Mix ratios (non-injector)

Fertilizer + Water (gallons) = Approx. N (ppm)
FertilizerWater (gallons) Approx. N (ppm)
1 tsp. (level)1283
1 tbsp. (level)2425
1 cup (level)25544
1 pound100228

 

 

Product properties

Potential acidity378.71 lbs. calcium carbonate equivalent per ton
Conductivity (100 ppm N)0.75 mmhos/cm.
Maximum solubility4.5 lbs./gal.
Derived from: Monopotassium Phosphate, Phosphoric Acid, Potassium Nitrate, Ammonium Nitrate, Magnesium Sulfate, Sodium Molybdate, Iron DTPA, Iron EDTA, Zinc EDTA, Copper EDTA, Manganese EDTA, Boric Acid, Iron HBED

 

 

Weight (oz.) of product needed to mix one gallon of concentrate

Target concentration (N/ppm) after dilutionEC (mmhos/cm.) of target feed rate after dilution
Injector ratios
1:151:1001:1281:2001:300
250.31.82.33.65.30.19
500.53.64.67.110.70.38
750.85.36.810.716.00.56
1001.17.19.114.321.40.75
1251.38.911.417.826.70.94
1501.610.713.721.432.11.13
1751.912.516.024.937.41.31
2002.114.318.228.542.81.50
2502.717.822.835.653.41.88
3003.221.427.442.864.12.25
3503.724.931.949.9EMS2.63
4004.328.536.557.0EMS3.00
4504.832.141.064.1EMS3.38
5005.335.645.671.3EMS3.75
6006.442.854.7EMSEMS4.50
EMS = exceeds maximum solubility

 

 

Gallons of water needed to dissolve one 25 lb. bag of fertilizer

Target concentration (N/ppm) after dilutionEC (mmhos/cm.) of target feed rate after dilution
Injector ratios
1:151:1001:1281:2001:300
251497.1224.6175.4112.374.90.19
50748.5112.387.756.137.40.38
75499.074.958.537.425.00.56
100374.356.143.928.118.70.75
125299.444.935.122.515.00.94
150249.537.429.218.712.51.13
175213.932.125.116.010.71.31
200187.128.121.914.09.41.50
250149.722.517.511.27.51.88
300124.818.714.69.46.22.25
350106.916.012.58.0EMS2.63
40093.614.011.07.0EMS3.00
45083.212.59.76.2EMS3.38
50074.911.28.85.6EMS3.75
60062.49.47.3EMSEMS4.50
EMS = exceeds maximum solubility

1
Consult rate tables printed on bag labels.
2
Verify product analysis and rate for plants in your production system (for assistance, contact your regional ICL Territory Manager or for testing, call the ICL Lab at 877-467-8522).
3
Irrigation frequency and volume should be adjusted during the crop production cycle according to crop type, environmental conditions, and desired soluble salt levels.
4
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).
5
Store in a clean, cool, dry place.

Brand details

This product is part of the Peters Excel pHLow portfolio

The acidifying action of Excel pHLow stabilizes pH levels in all types of growing media.

Learn more about Peters Excel pHLow

Can be used together with

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